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Готові списки джерел за темами / Fuel-air mixture / Статті в журналах

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Статті в журналах з теми "Fuel-air mixture"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 липня 2025

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1

Shayler, P. J., R. M. Isaacs, and T. H. Ma. "The variation of in-Cylinder Mixture Ratios during Engine Cranking at Low Ambient Temperatures." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 206, no. 1 (1992): 55–62. http://dx.doi.org/10.1243/pime_proc_1992_206_160_02.

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The development of mixture conditions in the cylinder of a fuel-injected spark ignition engine during engine cranking has been investigated at ambient temperatures down to —20°C. Mixtures near to the spark plug location were sampled and analysed to determine the air-fuel ratio and the relative proportions of light, medium and heavy components in the fuel. At low temperatures, the local air-fuel ratio varies substantially during the compression stroke, as does mixture composition. The change in mixture ratio over successive cycles of cranking depends on the fuel injected per cycle and the fuel-

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2

Cernat, A., C. Pana, N. Negurescu, and C. Nutu. "Study of the diesel fuel drop vaporization and combustion at a hydrogen-diesel fuel dual fuelled diesel engine." IOP Conference Series: Materials Science and Engineering 1311, no. 1 (2024): 012001. http://dx.doi.org/10.1088/1757-899x/1311/1/012001.

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Abstract The present paper shows the analysis of the results of the theoretical model developed by authors for diesel fuel drops vaporization study, air-diesel fuel-hydrogen mixture forming estimation and diesel fuel drops combustion in the presence of air-hydrogen mixtures set in the cylinder before the start of conventional fuel injection. The model is applied to a single cylinder diesel engine fuelled with diesel fuel and hydrogen, in dual mode by diesel gas method, at the engine speed of 900 rev/min. For a diesel fuel drop the vaporization speed, mixture formation speed, combustion speed,

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3

Raide, Veljo, Risto Ilves, and Jüri Olt. "Air-Fuel Mixture Temperatures with Light and Heavy Fuels for Effective Spark Ignition Engine Work." Advances in Military Technology 16, no. 2 (2021): 289–307. http://dx.doi.org/10.3849/aimt.01501.

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This research resulted from military interest in finding methods to provide distributed electricity generation in order to support comprehensive state defence measures. The aim of the study was to investigate the effect of a heated air-fuel mixture on the combustion process of a spark ignition (SI) engine, and to highlight the maximum temperatures to be applied to air-fuel mixtures with different fuel fractions in order to avoid any detonation of the fuel mixture in the engine. Tests were carried out with a petrol engine generator (GENSET) so that an investigation could be conducted into the e

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4

Булат, П. В., К. Н. Волков, Л. П. Грачев, И. И. Есаков та П. Б. Лавров. "Воспламенение топливной смеси с помощью многоточечного импульсного искрового разряда при различных начальных условиях". Журнал технической физики 91, № 9 (2021): 1339. http://dx.doi.org/10.21883/jtf.2021.09.51212.92-21.

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The development of efficient and reliable systems for the ignition of air/fuel mixtures is of interest for many practical applications associated with the use of combustion devices. To increase the total surface of the flame, ensure the reliability of ignition, increase the rate of combustion in the volume of the chamber and the completeness of combustion of the combustible mixture, multi-point ignition of the air/fuel mixture using several pulsed spark discharges is used. A comparison of the characteristics of combustion products in the working chamber when using different numbers of igniting

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5

Hamidi, Nurkholis. "Carbon Dioxide Effects on the Flammability Characteristics of Biogas." Applied Mechanics and Materials 493 (January 2014): 129–33. http://dx.doi.org/10.4028/www.scientific.net/amm.493.129.

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Flammability limits and flame speed of methane-carbon dioxide-air mixtures have been studied to understand the effect of carbondioxide on the flammability characteristic of biogas. The fuel of biogas discussed in this study was made by mixing gases of methane and carbon dioxide. The carbon dioxide was varied from 0% (by volume) untill reach the flammability limit of the stoikhiometri biogas-air mixtures. The observation was done using a cubic combustion bomb with the dimension of 500 mm x 200 mm x 10 mm with the initial condition being at room temperature and atmospheric pressure. The ignitor

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6

Gutarevich, Yurii, and Mykola Hora. "Improving the fuel efficiency of a spark ignition engine under full load conditions by adding nitrogen oxide to the air charge." Journal of Mechanical Engineering and Transport 19, no. 1 (2024): 39–45. http://dx.doi.org/10.31649/2413-4503-2024-19-1-39-45.

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The article presents the results of the oretical studies on the impact of methods for improving the energy characteristics on the fuel economy of a spark ignition engine with feedback and a three-way catalytic converter under full load conditions. Various methods for improving the energy characteristics of spark ignition engines to achieve high energy efficiency are known. The most commonly used method is enriching the fuel-air mixture under full load conditions. However, this method has several drawbacks, including reduced fuel economy and inefficient operation of the catalytic converter. Ano

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7

Truong, Quang Vinh, and Trung Hoc Ngo. "Calculating limiting oxygen concentration of gas mixtures." International Science Journal of Engineering & Agriculture 2, no. 2 (2023): 142–46. http://dx.doi.org/10.46299/j.isjea.20230202.13.

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The limit values for the fuel concentration in the air-flammable fuel mixture are LEL (lower explosive limit) and UEL (upper explosive limit). The addition of an inert component to the fuel / air mixture determines the increase and decrease of the LEL, until no explosion occurs. The maximum oxygen quantity of the non-combustible - air - inert fuel mixture is LOC (limited oxygen concentration), an important safety property. Investigation of a comprehensive set of data on the flammability at high temperature and ambient pressure obtained from documented sources was carried out for systems contai

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8

Alaskaree, Ekram Hadi, and Ahmed Qays Khudhair. "Investigating Heat Transfer Effects on Combustion Product Disintegration in Spark Ignition Engines." IOP Conference Series: Earth and Environmental Science 1507, no. 1 (2025): 012077. https://doi.org/10.1088/1755-1315/1507/1/012077.

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Abstract The big problem today is air pollution by car exhaust and how to reduce toxic exhaust gases This study examines the impact of varying exhaust temperatures on combustion products in spark ignition engines, focusing on heat transfer. The research analyzes air-fuel mixtures to understand how different exhaust temperatures influence the disintegration of gases. The findings highlight the importance of optimizing exhaust temperature to achieve Low-emission combustion and reduce toxic emissions. The study emphasizes that the ideal air-fuel mixture can prevent gas disintegration, while poor

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9

Asoyan, Arthur R., Igor K. Danilov, Igor A. Asoyan, and Georgy M. Polishchuk. "Hydrogen application in internal combustion engines." RUDN Journal of Engineering Researches 21, no. 1 (2020): 14–19. http://dx.doi.org/10.22363/2312-8143-2020-21-1-14-19.

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A technical solution has been proposed to reduce the consumption of basic hydrocarbon fuel, to improve the technical, economic and environmental performance of internal combustion engines by affecting the combustion process of the fuel-air mixture with a minimum effective mass fraction of hydrogen additive in the fuel-air mixture. The burning rate of hydrogen-air mixtures is an order of magnitude greater than the burning rate of similar mixtures based on gasoline or diesel fuel, compared with the former, they are favorably distinguished by their greater detonation stability. With minimal addit

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10

Okhotnikov, Mikhail, Alexandra Guzhva, and Irina Claptyuk. "FEATURES OF THE STUDY OF FIRES ASSOCIATED WITH EXPLOSIONS OF FUEL-AIR MIXTURES." Problems of risk management in the technosphere 2023, no. 4 (2024): 156–66. http://dx.doi.org/10.61260/1998-8990-2024-2023-4-156-166.

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Explosions of fuel-air mixtures and their accompanying fires are perhaps the most common emergencies. A high probability of this kind of emergency is typical for both industrial facilities and the residential sector. When studying fires associated with deflagration (explosive) gorenje fuel-air mixtures, experts often face a number of questions that are difficult to solve when using the standard methodological approach used in the study of a classic fire. The article presents an expert analysis of fires caused by the ignition (explosion) of a fuel-air mixture. The paper also presents stat

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11

Ter-Mkrtich'yan, G. G., A. S. Terenchenko, V. V. Glaviznin, N. A. Mikerin, and S. A. Shabanov. "Optimization of the gas-air path system parameters for trapping automotive fuel vapors." Trudy NAMI, no. 2 (July 4, 2022): 21–33. http://dx.doi.org/10.51187/0135-3152-2022-2-21-33.

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Introduction (statement of the problem and parameters relevance). The composition of the mixture of air and gasoline vapors differs in air and vapors ratio when purging the absorber at different time of the car operation. Therefore, the air-fuel mixture entering the engine for afterburning can create uncertainties in lambda control.The purpose of the research was to determine the main features of lambda regulation in an unstable fuel-air mixture.Methodology and research methods. An analysis of the mixed air and fuel vapor flows entering the engine during absorber purge was made. The compositio

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12

Volodymyr, Korohodskyi, Kryshtopa Sviatoslav, Migal Vasiliy, et al. "DETERMINING THE CHARACTERISTICS FOR THE RATIONAL ADJUSTING OF AN FUEL-AIR MIXTURE COMPOSITION IN A TWO-STROKE ENGINE WITH INTERNAL CARBURATION." Eastern-European Journal of Enterprise Technologies 2, no. 5 (104) (2020): 39–52. https://doi.org/10.15587/1729-4061.2020.200766.

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An operating process for engines with spark ignition and direct fuel injection engines which ensures the formation of a stratified lean fuel-air charge under the modes of partial loads and the power composition of the fuel-air mixture at high loads has been developed. The design of a two-stroke spark-ignition engine was modernized by installing a direct fuel injection system, placing the nozzle in the cylinder wall, and changing the combustion chamber shape. A procedure of adjustment of the composition of the fuel-air mixture in the cylinder of a two-stroke spark-ignition engine has been devel

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13

Frolov, Sergey M., Konstantin S. Panin, and Viktor A. Smetanyuk. "Gasification of Liquid Hydrocarbon Waste by the Ultra-Superheated Mixture of Steam and Carbon Dioxide: A Thermodynamic Study." Energies 17, no. 9 (2024): 2126. http://dx.doi.org/10.3390/en17092126.

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The thermodynamic modeling of waste oil (WO) gasification by a high-temperature gasification agent (GA) composed of an ultra-superheated H2O/CO2 mixture is carried out. The GA is assumed to be obtained by the gaseous detonation of fuel–oxidizer–diluent mixture in a pulsed detonation gun (PDG). N-hexadecane is used as a WO surrogate. Methane or the produced syngas (generally a mixture of H2, CO, CH4, CO2, etc.) is used as fuel for the PDG. Oxygen, air, or oxygen-enriched air are used as oxidizers for the PDG. Low-temperature steam is used as a diluent gas. The gasification process is assumed to

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14

Cernat, Alexandru, Constantin Pana, and Niculae Negurescu. "Aspects of in-Cylinder Mixture Formation Study for a Diesel Engine Fuelled with LPG by Diesel-Gas Method." Applied Mechanics and Materials 809-810 (November 2015): 1043–48. http://dx.doi.org/10.4028/www.scientific.net/amm.809-810.1043.

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The Liquid Petroleum Gas can be use for diesel engine fuelling with significant result in term of pollutant emissions improvement, with important reduction of nitrous oxides and smoke for a LPG dual fuelled diesel engine. Beside this the LPG fuelling affects the combustion process inside the cylinder and also the mixture forming. High degree of homogeneity of the air-LPG mixtures will accelerate the in-cylinder mixture forming between air-LPG and diesel fuel jets, since the LPG-air mixture combustion starts. The paper presents the results of a zero-dimensional, one-zone thermodynamic model dev

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15

Kessler, D. A., V. N. Gamezo, and E. S. Oran. "Gas-phase detonation propagation in mixture composition gradients." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1960 (2012): 567–96. http://dx.doi.org/10.1098/rsta.2011.0342.

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The propagation of detonations through several fuel–air mixtures with spatially varying fuel concentrations is examined numerically. The detonations propagate through two-dimensional channels, inside of which the gradient of mixture composition is oriented normal to the direction of propagation. The simulations are performed using a two-component, single-step reaction model calibrated so that one-dimensional detonation properties of model low- and high-activation-energy mixtures are similar to those observed in a typical hydrocarbon–air mixture. In the low-activation-energy mixture, the reacti

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16

Korohodskyi, Volodymyr, Andrii Rogovyi, Oleksandr Voronkov, et al. "Development of a three-zone combustion model for stratified-charge spark-ignition engine." Eastern-European Journal of Enterprise Technologies 2, no. 5 (110) (2021): 46–57. http://dx.doi.org/10.15587/1729-4061.2021.228812.

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A thermodynamic model for calculating the operating process in the cylinder of a spark-ignition engine with internal mixture formation and stratified air-fuel charge based on the volume balance method was developed. The model takes into account the change in the working fluid volume during the piston movement in the cylinder. The equation of volume balance of internal mixture formation processes during direct fuel injection into the engine cylinder was compiled. The equation takes into account the adiabatic change in the volume of the stratified air-fuel charge, consisting of fuel-air mixture

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17

Volodymyr, Korohodskyi, Rogovyi Andrii, Voronkov Oleksandr, et al. "Development of a three-zone combustion model for stratified-charge spark-ignition engine." Eastern-European Journal of Enterprise Technologies 2, no. 5 (110) (2021): 46–57. https://doi.org/10.15587/1729-4061.2021.228812.

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A thermodynamic model for calculating the operating process in the cylinder of a spark-ignition engine with internal mixture formation and stratified air-fuel charge based on the volume balance method was developed. The model takes into account the change in the working fluid volume during the piston movement in the cylinder. The equation of volume balance of internal mixture formation processes during direct fuel injection into the engine cylinder was compiled. The equation takes into account the adiabatic change in the volume of the stratified air-fuel charge, consisting of fuel-air mixture

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18

Galiev, I. R. "Patterns of lean methane-air mixtures combustion in piston engine." Vestnik Gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S. O. Makarova 16, no. 5 (2024): 784–94. https://doi.org/10.21821/2309-5180-2024-16-5-784-794.

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The article is devoted to the study of the patterns of combustion of lean methaneair mixtures in marine internal combustion engine. Literature review shows that the implementation of combustion technology for a homogeneous lean methaneair mixture will increase the compression ratio, reduce fuel consumption and improve the environmental engine performance. However due to an increase in misfires and a decrease in the speed of flame propagation, the combustion of lean methaneair mixtures remains an unresolved problem. The article studies the influence of the excess air coefficient (from 1 to 1.4)

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19

Akunov, Bakytbek. "Experimental Analysis of Long-Term Fuel Trim Performance in a Gasoline Engine Under Various Operating Conditions." International Journal of Automotive and Mechanical Engineering 21, no. 4 (2024): 11744–56. http://dx.doi.org/10.15282/ijame.21.4.2024.2.0905.

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This paper analyzes the effect of operating conditions on the enrichment of the fuel-air mixture in a car engine due to a decrease in air mass with increasing altitude above sea level. This study focuses on fuel trim, particularly long-term fuel trim, in optimizing the composition of the fuel-air mixture before it enters the engine's combustion chamber. Experimental studies were conducted on the Bishkek–Osh highway in the Kyrgyz Republic, a road characterized by flat, mountainous, and high-altitude sections with complex terrain. Based on the research objectives, experimental results were obtai

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20

OKAJIMA, Satoshi. "Measurement of burning velocity on DME fuel-air mixtures using microgravity technique." Combustion Engines 122, no. 3 (2005): 56–60. http://dx.doi.org/10.19206/ce-117400.

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Experiment has been carried out to examine the fundamental combustion characteristics of DME fuel-air mixtures using micro-gravity technique, which is achieved in freely falling chamber. The initial conditions of temperature and pressure are 293 K and 0.10 MPa, respectively and the equivalence ratio is the range from stoichiometoric proportion to near the lower flammability limit. The results obtained in the study are as follows:(1) micro-gravity technique is very useful to analyze the flame behavior even at very lean mixtures, and (2) the burning velocity of DME fuel- air mixture is nearly th

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21

Dodds, W. J., and E. E. Ekstedt. "Evaluation of Fuel Preparation Systems for Lean Premixing-Prevaporizing Combustors." Journal of Engineering for Gas Turbines and Power 108, no. 2 (1986): 391–95. http://dx.doi.org/10.1115/1.3239917.

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A series of tests was conducted to provide data for the design of premixing-prevaporizing fuel-air mixture preparation systems for aircraft gas turbine engine combustors. Fifteen configurations of four different fuel-air mixture preparation system design concepts were evaluated to determine fuel-air mixture uniformity at the system exit over a range of conditions representative of cruise operation for a modern commercial turbofan engine. Operating conditions, including pressure, temperature, fuel-air ratio, and velocity had no clear effect on mixture uniformity in systems which used low-pressu

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22

Торба, Юрій Іванович, Дмитро Вікторович Павленко та Віталій Вікторович Манжос. "Моделювання якісного складу паливно-повітряної суміші у факельному запальнику камер згоряння ГТД". Aerospace technic and technology, № 5 (6 жовтня 2021): 39–47. http://dx.doi.org/10.32620/aktt.2021.5.05.

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The qualitative composition of the fuel-air mixture, which is formed in the torch igniter of the combustion chamber of the gas turbine engine (GTE), determines the efficiency and reliability of their work. The main task of the study is to determine the qualitative composition of the fuel-air mixture near the electric spark plug of the GTE torch igniter depending on its geometric features and engine operation condition. The composition of the mixture was evaluated using analytical, experimental, and numerical methods. According to the analytical model, a significant over-enrichment of the fuel-

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23

Puškár, Michal, Jozef Živčák, Matúš Lavčák, Marieta Šoltésová, and Melichar Kopas. "Analysis of Combustion Conditions for Sustainable Dual-Fuel Mixtures." Sustainability 14, no. 21 (2022): 13962. http://dx.doi.org/10.3390/su142113962.

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The scientific contribution is focused on the analysis and optimization of combustion conditions concerning the dual-fuel mixtures. The greatest attention was paid to the temperature of intake air when a mixture of ethanol and gasoline created the applied fuel. An experimental fuel mixture was added into the intake pipe and ultra-low sulphur diesel fuel (ULSDF) was added directly into the engine cylinder using the CR (common rail) injection system. The article analysed the medium- and high-level operational engine load, whereby the engine timing parameters originally corresponded to a conventi

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24

Wierzba, I., and K. Kar. "Flame Flashback Within Turbulent Streams of Lean Homogeneous Fuel Mixtures and Air." Journal of Energy Resources Technology 114, no. 2 (1992): 142–45. http://dx.doi.org/10.1115/1.2905933.

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The flame flashback limit represents the minimum concentration of the fuel in the stream of homogeneous mixtures of fuel and air at which a flame can propagate upstream against the direction of the flow. Information about these limits is important in the assessment of the safety of operation in situations where a flowing homogeneous fuel-air mixture is present. The present work examines the flame flashback in turbulent homogeneous fuel-air streams with Reynolds number up to 16,000. The flashback limits were established for a number of common gaseous fuels, such as methane, propane, hydrogen, e

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25

Kislov, Oleh, Maya Ambrozhevich, and Mykhailo Shevchenko. "Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines." Eastern-European Journal of Enterprise Technologies 2, no. 8 (110) (2021): 23–30. http://dx.doi.org/10.15587/1729-4061.2021.229515.

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Determination of specific fuel consumption of air-breathing engines is one of the problems of modeling their performance. As a rule, the estimation error of the specific fuel consumption while calculating air-breathing engine performance is greater than that of thrust. In this work, this is substantiated by the estimation error of the fuel-air ratio, which weakly affects thrust but significantly affects the specific fuel consumption. The presence of a significant error in the fuel-air ratio is explained by the use of simplified methods, which use the dependence of enthalpy as a function of mix

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26

Oleh, Kislov, Ambrozhevich Maya, and Shevchenko Mykhailo. "Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines." Eastern-European Journal of Enterprise Technologies 2, no. 8 (110) (2021): 23–30. https://doi.org/10.15587/1729-4061.2021.229515.

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Анотація:

Determination of specific fuel consumption of air-breathing engines is one of the problems of modeling their performance. As a rule, the estimation error of the specific fuel consumption while calculating air-breathing engine performance is greater than that of thrust. In this work, this is substantiated by the estimation error of the fuel-air ratio, which weakly affects thrust but significantly affects the specific fuel consumption. The presence of a significant error in the fuel-air ratio is explained by the use of simplified methods, which use the dependence of enthalpy as a function of mix

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27

Klimov, V. N., D. Ya Dud’ev, V. Ya Sigaylo, N. I. Klimov, and Yu K. Mashkov. "Research of the operability of an air-fuel lubrication and cooling system of gas turbine engine rotor bearings." VESTNIK of Samara University. Aerospace and Mechanical Engineering 18, no. 1 (2019): 55–66. http://dx.doi.org/10.18287/2541-7533-2019-18-1-55-66.

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The article is devoted to the problem of ensuring the operability of air-fuel lubrication and cooling systems for gas turbine engine (GTE) rotor bearings. The paper considers one of the advanced designs of a GTE in which an air-fuel mixture obtained in a special mixer is fed to a bearing installed in the turbine support and then through a hollow shaft to the bearing of the compressor support and then directed to the engine input. It is difficult to implement such a GTE scheme because of the necessity to ensure the operability of bearings lubricated with an air-fuel mixture for a predetermined

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28

Green, H. G., J. H. Whitelaw, and K. Y. Wong. "Air-Fuel Mixture Characteristics of Reciprocating Engines." Combustion Science and Technology 59, no. 4-6 (1988): 225–46. http://dx.doi.org/10.1080/00102208808947098.

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29

Du, Yang, Jian Feng Gao, and Xin Sheng Jiang. "Studies of Fuel-Air Mixture Explosion Characteristics and Structure Fracture and Damage in Large-Scale Metal Oil Storage Tank." Key Engineering Materials 324-325 (November 2006): 1031–34. http://dx.doi.org/10.4028/www.scientific.net/kem.324-325.1031.

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The fuel-air mixture explosion incidents in the large-scale metal oil storage tank are frequent occurrence and rapidly extend because of the tank structure being fractured and damaged by the fuel-air mixture explosion. In this paper, the simulation experiment and numerical simulation has been carried out for the fuel-air mixture explosion in the large-scale metal storage tank. The shock waves characteristic of the explosive pressure has been studied and discussed. The fracture and damage effects caused by the shock waves characteristic to the tank structure has been analyzed and discussed too.

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30

Feng, Li Yan, Chun Hua Zhang, Jiang Ping Tian, et al. "Combustion System Optimization of a Gasoline Direct Injection Engine." Advanced Materials Research 354-355 (October 2011): 419–28. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.419.

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With the purpose of optimizing the combustion system of a homogeneous charged gasoline direct injection engine, its working process was simulated with a 3-D CFD software package. The authors investigated the influence of injection timings and combustion chamber shapes on the charge motion, fuel injection and their influence on fuel-air mixture formation. With the comparisons of fuel-air mixture quality and combustion processes between two typical injection timings, the optimal injection strategy was chosen. To further improve the mixture quality, configuration on piston crown was optimized and

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31

Wang, Dong, Yang Du, Xin Sheng Jiang, Jian Jun Liang, and Jian Zhong Zhou. "Experimental Study on Dispersion and Explosion Process of Fuel-Air Mixture in Underground Fuel Depot." Applied Mechanics and Materials 590 (June 2014): 261–65. http://dx.doi.org/10.4028/www.scientific.net/amm.590.261.

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Анотація:

In this paper, the fuel-air dispersion and explosion experimental system was designed and experimental simulation on fuel-air mixture spreading and exploding in long-narrow underground fuel depot was carried out. The special phenomena of fuel-air mixture dispersion and explosion process, the characteristic feature of the pressure curve and mechanism were analyzed. The explosion process can be divided into three stages: flame accelerating section, oscillating reaction section and wave dissipating section. And under the same initial conditions, if the ignition time advanced, there is a significa

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32

Ikpe, A. E., and I. B. Owunna. "A 3D modelling of the in-cylinder combustion dynamics of two stroke internal combustion engine in its service condition." Nigerian Journal of Technology 39, no. 1 (2020): 161–72. http://dx.doi.org/10.4314/njt.v39i1.18.

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Анотація:

In this study, a two stroke internal combustion engine was successfully modeled as a closed cycle with the intake, compression, expansion and exhaust processes considered in two strokes of the reciprocating piston. The in-cylinder combusted gases with respect to air-fuel mixture of 14.4:1 in the two stroke engine model were analyzed, showing the dynamics of the combusted gases, the flame pressure and temperature trajectories. It was observed that provided compression and expansion takes place at air-fuel mixture near ideal condition (14.7:1), the combusted gas temperature which occurred in the

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33

Gorev, V. A., and E. S. Klenov. "Self-Ignition Conditions when Mixing Combustion Products with Air-Fuel Mixture." Occupational Safety in Industry, no. 12 (December 2024): 7–12. https://doi.org/10.24000/0409-2961-2024-12-7-12.

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Анотація:

To date, the possibility of self-ignition of systems obtained due to mixing a cold air-fuel mixture with hot combustion products has been established. The topic of potential generation of such mixtures, however, is understudied. The article attempts to determine the conditions under which self-igniting systems are generated in the case considered. For the studies, a model of an ideal mixing reactor with increasing mass and temperature in the system under condition of constant pressure and mass flow of combustion products inflowing to the system has been applied. The cold air-fuel mixture is in

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34

Khalid, Amir, Christian Yohan M. Jaat, Izzuddin Zaman, B. Manshoor, and M. F. M. Ali. "Effect of Preheated Fuel on Mixture Formation of Biodiesel Spray." Applied Mechanics and Materials 393 (September 2013): 493–98. http://dx.doi.org/10.4028/www.scientific.net/amm.393.493.

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The key issue in using vegetable oil-based fuels is oxidation stability, stoichiometric point, bio-fuel composition, antioxidants on the degradation and viscosity thus influences to the different spray atomization and fuel air mixing characteristics. Purpose of this study is to investigate the effect of preheated biodiesel on fuel properties, spray characteristics and mixture formation. The detail behavior of mixture formation was investigated using the direct photography system with a digital color camera. This method can capture spray evaporation, spray length and mixture formation clearly w

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35

Zhevzhyk, Oleksandr, Iryna Potapchuk, Vadym Horiachkin, Serhii Raksha, Dmytro Bosyi, and Andrii Reznyk. "Mathematical modelling of mixture formation in the combustion chamber of a diesel engine." Technology audit and production reserves 2, no. 1(82) (2025): 63–68. https://doi.org/10.15587/2706-5448.2025.326746.

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Анотація:

The object of research is the process of fuel mixture formation in a vortex combustion chamber located in the piston of a diesel engine. Ineffective mixture formation leads to increased specific fuel consumption and harmful emissions into the atmosphere. The research addresses determining the conditions under which complete evaporation of droplets is achieved and the required ratio of the amount of fuel vapor and the available amount of air depending on the piston radius. A mathematical model was created to describe the behavior of fuel droplets under the influence of aerodynamic forces, heat

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36

Zhumagulov, Mikhail G., Maxim V. Dolgov, Askar A. Baubek, and Alexander M. Gribkov. "Comparative Analysis of Swirl Burner and Cross Jet Burner in Terms of Efficiency and Environmental Performance." Journal of Combustion 2023 (August 18, 2023): 1–18. http://dx.doi.org/10.1155/2023/1692296.

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Анотація:

The article contains a comparative analysis of two types of burners used in different methods of fuel-air mixture preparation: (1) vortex mixing and (2) mixing with transverse jets. The analysis was carried out in order to determine which one of the two burning devices is more efficient and has better environmental performance. In device no. 1, conditions for the fuel-air mixture formation are created by vortex turbulence. The basic principle lying at the core of this design is a vortex flow inside, which provokes a more intense mixing of fuel and air. Moreover, preliminary physical and therma

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37

Kakuho, A., Y. Hashizume, T. Urushihara, T. Itoh, and T. Mansion. "Infrared absorption technique for measuring local fuel concentration near the spark plug of a port injection gasoline engine." International Journal of Engine Research 10, no. 4 (2009): 265–74. http://dx.doi.org/10.1243/14680874jer03609.

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Анотація:

The mixture concentration in the vicinity of the spark plug at the time of spark ignition is a critical parameter for the performance of SI engines. Infrared absorption is often used to measure this parameter in firing cycles. Although it is well known that the mixture concentration near the spark plug is a primary factor explaining combustion stability in direct injection engines, the effect of the local mixture concentration has not been confirmed for nearly homogeneous mixtures. In this research, the mixture concentration in the vicinity of the spark plug was measured quantitatively using i

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38

Wang, T., Z. Peng, S.-L. Liu, H.-D. Xiao, and H. Zhao. "Optimization of stratification combustion in a spark ignition engine by double-pulse port fuel injection." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 221, no. 7 (2007): 845–57. http://dx.doi.org/10.1243/09544070jauto376.

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Анотація:

The potential of lean burn in a spark-ignition (SI) engine with optimized fuel injection was experimentally investigated and numerically simulated. The experiments were carried out on a production SI engine which has a port fuel injection (PFI) system. The previous port electronic fuel injection system was modified and the technique of double-pulse fuel injection (DFI) was employed. By regulating injection timings and proportions of DFI, the air-fuel mixture stratification was significantly improved and the expected lean burn was implemented. The experimental results showed that the reduction

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39

Gutarevich, Y. F., and M. D. Hora. "THE INFLUENCE OF NITROUS OXIDE ADDITION TO THE AIR CHARGE ON THE INDICATORS OF A SPARK IGNITION ENGINE UNDER FULL LOAD OPERATION." Internal Combustion Engines, no. 1 (September 2, 2024): 34–42. http://dx.doi.org/10.20998/0419-8719.2024.1.05.

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Анотація:

The article presents the methodology and research results on the influence of nitrous oxide addition to the air charge on the energy and environmental indicators, as well as the fuel economy of a spark ignition engine with feedback and a three-way catalytic converter under full load conditions. Full load engine modes are often used in conditions of intense traffic of vehicles in cities and settlement. Increasing energy indicators is relevant for sports vehicles and stationary energy installations operating at full load. When determining the most efficient method of achieving high engine energy

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40

Shilova, Alyona. "Experimental studies on the influence of fuel gas heating on emission characteristics of depleted mixture combustion." Perm National Research Polytechnic University Aerospace Engineering Bulletin, no. 79 (2024): 119–29. https://doi.org/10.15593/2224-9982/2024.79.10.

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Анотація:

This work is devoted to experimental studies of CO and NOx emission during low-temperature combustion of depleted mixture with separate feeding of components. Increasing the fuel gas temperature is one of the most effective ways to intensify mixing of fuel gas with air not only by increasing the degree of turbulisation of the mixture, but also by increasing the flow rate of fuel gas from the nozzle openings in accordance with a decrease in its density and an increase in the volumetric flow rate. The description of the scheme of the experimental stand for the study of combustion characteristics

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41

Egorushkin, E. A., A. V. Shabanov, and A. A. Shabanov. "Ignition of poor fuel-air mixtures in gasoline-driven ICEs - problems, solutions." Izvestiya MGTU MAMI 11, no. 2 (2017): 72–77. http://dx.doi.org/10.17816/2074-0530-66923.

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Анотація:

The article deals with the development of technologies in the field of improving the organization of the combustion process in internal combustion engines in order to solve the problem of protecting the environment and increasing the efficiency of fuel resources. The carried out analysis has shown the increased interest of researchers and automotive experts in the problem of ignition of poor mixtures in ICE by the method of fuel-air charge separation in the combustion chamber. The directions of intensification of combustion of poor mixtures in internal combustion engines are considered due to

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42

Wierzba, I., and G. A. Karim. "The Flammability of Fuel Mixtures in Air Containing Propane and Butane." Journal of Energy Resources Technology 111, no. 2 (1989): 100–103. http://dx.doi.org/10.1115/1.3231403.

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Анотація:

The behavior of the lean and rich flammability limits of various fuel mixture combinations involving propane, n-butane, propylene and ethylene, which feature prominently in a variety of industrial and natural fuel gases such as liquefied petroleum gases (LPGs), was examined. It was found that the lean limits of such mixtures can be predicted well by using Le Chatelier’s Rule. This rule can also predict the rich flammability limits of propane-n-butane mixtures. However, its application to calculate the rich limits of mixtures such as propane-propylene, propane-ethylene, butane-ethylene, propyle

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43

Green, R. K., and C. C. Zavier. "Charge Stratification in a Spark Ignition Engine." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 206, no. 1 (1992): 59–64. http://dx.doi.org/10.1243/pime_proc_1992_206_008_02.

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The effect of charge stratification on lean mixture combustion in a Ricardo E6 single-cylinder four-stroke reciprocating engine has been investigated. To do this, a commercially available spark plug was modified so that small amounts of pure methane gas could be injected, via the spark electrode, into a lean mixture within the combustion chamber prior to ignition. The effect on engine performance of variations in the methane injection process were analysed. The research has led to the following conclusions: 1. The lean limit of a homogeneous air-fuel mixture is extended by this relatively simp

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44

Jairam, Karthick, Feroskhan Mohammed Musthafa, Kishorre Annanth Vijayan, and Manimaran Renganathan. "Computational investigations on port injected DEE in a biogas inducted HCCI engine." International Journal for Simulation and Multidisciplinary Design Optimization 12 (2021): 9. http://dx.doi.org/10.1051/smdo/2021010.

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Анотація:

Owing to global climate change and atmospheric pollution, several automobile manufacturing companies look for homogeneously charged engines to satisfy strict emission levels. In the present work, computational fluid dynamics (CFD) investigations have been carried out to showcase the homogeneity of air-fuel mixture formation by port fuel injection and manifold fuel injection of a Biogas-Diethyl Ether (DEE) homogeneous charge compression engine (HCCI). The distributions of equivalence ratio based on fuel and the total air-fuel mixture is formulated and found to be in close agreement with the lit

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45

KOVAR, Zdenek, Celestyn SCHOLZ, Stanislav BEROUN, et al. "Hydrogen piston engines: R&D, experiences." Combustion Engines 125, no. 2 (2006): 28–36. http://dx.doi.org/10.19206/ce-117350.

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Анотація:

Results of experimental works on hydrogen testing engines are presented in the paper: mixture forming, burning of air-hydrogen mixtures with different air/fuel ratio, NOx production, power parameters. The R&D works were realized on a single cylinder test engine (both natural aspirated and supercharged) and on a turbocharged six cylinder test engine as well.

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46

Huang, Q., B. Jones, and N. J. Leighton. "Hybrid Solid State Fluidic Technique in Engine Fuel Injection Systems." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 207, no. 1 (1993): 35–41. http://dx.doi.org/10.1243/pime_proc_1993_207_157_02.

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Анотація:

This paper describes a multi-point fuel injection system utilizing fiuidic devices as fuel injector stages for spark ignition engines. The novel fuel injector unit consists of no-moving-part fluidic devices controlled by a solenoid valve interface and unique air/fuel mixing nozzles for good fuel atomization. The results of laboratory tests show that the fluidic device stage has a fast dynamic response and its on/off switching delay to the control flow signal is within 1 ms. A balanced fuel distribution at the four fluidic injector stages (for a four-cylinder engine) and well-atomized air/fuel

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47

Popa, Cătălin Mihai, Silviu Marin Nan, Mihaela Părăian, Adrian Jurca, and Florin Păun. "Aspects of laboratory tests for the determination of the minimum ignition energy of the fuel / dust mixture." MATEC Web of Conferences 342 (2021): 04004. http://dx.doi.org/10.1051/matecconf/202134204004.

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Анотація:

During the technological processes of processing, production, handling and storage of combustible dusts, complex explosive mixtures may occur, the characteristics of which, in most cases, cannot be assimilated with the existing data in the specialized literature. If these combustible dusts are mixed with air in appropriate proportions and are initiated by an efficient source of ignition, they can burn rapidly and with considerable explosive force. One of the most common sources of ignition of potentially explosive atmospheres generated by the dust / air mixture is static electricity, materiali

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48

Penkin, Aleksei L., and Sofya A. Metlyakova. "METHOD FOR INCREASING THE UNIFORMITY OF THE GAS-AIR MIXTURE IN INTERNAL COMBUSTION TRANSPORT ENGINES." International Journal of Advanced Studies 13, no. 1 (2023): 137–58. http://dx.doi.org/10.12731/2227-930x-2023-13-1-137-158.

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Анотація:

Increasing the uniformity of the gas-air mixture in gas transport engines makes it possible to ensure more complete combustion of fuel, reduce its specific fuel consumption and exhaust gas toxicity. There are known ways to increase uniformity, but there is no generalization of their principles and applicability for various engines. The article analyzes the existing methods and identifies their shortcomings. A method has been developed to increase the uniformity of the gas-air mixture in gas transport engines by controlling the position of the gas fuel jet in the incoming air stream. The depend

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49

Shypul, Olga, Vadym Garin, Vitalii Myntiuk, and Attila Egedy. "Study of Green Hydrogen-Air Mixture Formation in a Closed Chamber With a Given Composition." Hungarian Journal of Industry and Chemistry 52, no. 2 (2024): 57–62. https://doi.org/10.33927/hjic-2024-19.

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Анотація:

The subject of this study is the formation of a hydrogen-air fuel mixture with a given composition and the required degree of homogeneity in a closed chamber while taking into consideration conditions for generating hydrogen by an electrolytic method. This study includes an industrial technology fueled by combustible gases to process thermoplastic parts. The motivation behind this research is the transition to carbon-free processing technology, which would not only reduce emissions and is in line with the concept of a climate-neutral industry but also raises the level of safety with regard to

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50

Narcizo, G. G., and D. A. Miranda. "NUMERICAL ANALYSIS OF THE AIR-FUEL MIXTURE IN INDIRECT AND DIRECT INJECTION OF FOUR-STROKE ENGINES." Revista de Engenharia Térmica 18, no. 2 (2019): 89. http://dx.doi.org/10.5380/reterm.v18i2.70799.

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Анотація:

The quality of the air-fuel mixture in internal combustion engines directly affects the combustion efficiency, therefore a good design of the combustion chamber combined with the correct fuel injection system, can provide a better use of this mixture and increase the efficiency of the engine. Considering these aspects, this scholarly work presents a comparative study of the indirect injection system and direct fuel injection, analyzing the way the mixture behaves in these two conditions. For this, the Ansys Fluent simulation software was used, in which were applied computational fluid dynamics

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