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Artykuły w czasopismach na temat „Spray combustion environment”

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Data publikacji: 6 września 2023

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1

Desantes, Jose M., Jose M. Garcia-Oliver, Ricardo Novella, and Leonardo Pachano. "A numerical study of the effect of nozzle diameter on diesel combustion ignition and flame stabilization." International Journal of Engine Research 21, no. 1 (2019): 101–21. http://dx.doi.org/10.1177/1468087419864203.

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The role of nozzle diameter on diesel combustion is studied by performing computational fluid dynamics calculations of Spray A and Spray D from the Engine Combustion Network. These are well-characterized single-hole sprays in a quiescent environment chamber with thermodynamic conditions representative of modern diesel engines. First, the inert spray evolution is described with the inclusion of the concept of mixing trajectories and local residence time into the analysis. Such concepts enable the quantification of the mixing rate, showing that it decreases with the increase in nozzle diameter.

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Jafarmadar, Samad, Shram Khalilarya, Sina Shafee, and Ramin Barzegar. "Modeling the effect of spray/wall impingement on combustion process and emission of DI diesel engine." Thermal Science 13, no. 3 (2009): 23–33. http://dx.doi.org/10.2298/tsci0903023j.

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This work is presented to study the effect of spray impinging on the combustion process and emissions in a direct injection diesel engine at various engine speeds. Computations are carried out using a three-dimensional modeling for sprays, spray-wall interactions, flow field, emission, and combustion process. Results indicate an increase in engine speed leads to increased spray impinging (wall film formation), turbulence intensity and average wall temperature in cylinder. The enhanced air/fuel mixing and intensified evaporation of wall film decreases soot emission by reducing the extent of the

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3

Arai, Masataka. "Interpretative Review of Diesel Spray Penetration Normalized by Length and Time of Breakup (Similarity Law of Diesel Spray and Its Application)." Energies 15, no. 13 (2022): 4926. http://dx.doi.org/10.3390/en15134926.

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Tip penetration of diesel spray is one of the most useful parameters to evaluate diesel combustion dynamics. It has strong relationships with ignition delay, premix/diffusion combustion and engine performance, including exhaust emissions. To discuss general combustion physics in various size sprays, non-dimensional expression of spray tip penetration is reviewed. Length and time of injected fuel jet breakup can be considered as characteristic length and timescale of diesel spray. Then, normalized penetration by length and time of breakup was proposed for the scaling of various diesel sprays. U

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4

Liu, Yu, Jun Li, Ying Gao, and Xin Mei Yuan. "Laser Diagnostic Investigation on the Spray and Combustion with Butanol-Biodiesel-Diesel Fuel Blends." Advanced Materials Research 443-444 (January 2012): 986–95. http://dx.doi.org/10.4028/www.scientific.net/amr.443-444.986.

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. In this paper, blends of butanol-biodiesel-diesel were tested inside a constant volume chamber to investigate liquid spray and combustion of the fuels. With high-speed camera and synchronized copper vapor laser, spray penetration during injection is recorded since it has a higher light reflectivity. Various ambient temperatures and fuel composition were investigated. There is a sudden drop in spray penetration at 800 K and 900 K, but not at 1000 K and 1200 K. When the spray penetration of the butanol-biodiesel-diesel blends is compared to that of the biodiesel-diesel blends, under non-combus

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5

Chung, Wai Tong, Peter C. Ma, and Matthias Ihme. "Examination of diesel spray combustion in supercritical ambient fluid using large-eddy simulations." International Journal of Engine Research 21, no. 1 (2019): 122–33. http://dx.doi.org/10.1177/1468087419868388.

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High-pressure conditions in diesel engines can often surpass the thermodynamic critical limit of the working fluid. Consequently, the injection of fuel at these conditions can lead to complex behaviors that remain only incompletely understood. This study is concerned with investigating the application of a diffuse-interface method in conjunction with a finite-rate chemistry model in large-eddy simulations of diesel spray injection and ignition in a supercritical ambient environment. The presented numerical approach offers the capability of simulating these complex conditions without the need f

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6

Xuan, Tiemin, Zhongcheng Sun, Peng Lu, et al. "Optical study on needle lift and its effects on reacting diesel sprays of a single-hole solenoid injector." Thermal Science, no. 00 (2020): 289. http://dx.doi.org/10.2298/tsci190925289x.

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Precise control of needle lift provides one possibility to control the Diesel spray and combustion process actively. However, most studies of needle lift focus on internal flow or near nozzle spray. Little work has been performed on its effects on reacting spray. In this work, one way to change the needle lift profile of a solenoid injector has been developed and the relationship between needle lift and reacting spray has been investigated. The needle movement was detected with an optical nozzle. In addition, the visualization of reacting sprays of the same injector equipped with a single-hole

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7

Luo, Meng, Pingping Zhu, Usman Rana, Hu Ma, Zhendong Yu, and Oskar J. Haidn. "Modeling Investigation of Liquid Oxygen Flashing Spray with CFD." Journal of Physics: Conference Series 2235, no. 1 (2022): 012061. http://dx.doi.org/10.1088/1742-6596/2235/1/012061.

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Abstract Injection of cryogenic propellants (e.g. liquid oxygen) into low-pressure environment (e.g. upper-stage rocket engine) may trigger flashing phenomenon, which severely affects the propellants’ mixing and combustion. In order to unveil the characteristics of flashing sprays, numerical models of flashing sprays were developed and validated. First, a developed model based on Adachi-correlation was employed for the flashing spray simulation. The results show good agreements with the experiments, both for the flashing spray morphology and temperature distribution. In the near-injector regio

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8

Li, Zhijie, Jie Pan, Wei Li, Xiangting Wang, Haiqiao Wei, and Jiaying Pan. "New Insights into Abnormal Combustion Phenomena Induced by Diesel Spray-Wall Impingement under Engine-Relevant Conditions." Energies 15, no. 8 (2022): 2941. http://dx.doi.org/10.3390/en15082941.

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High altitude and low temperature is the common extreme environment for internal combustion engines. Under such operating conditions, heavy-duty diesel engines often suffer from serious abnormal combustion, such as knocking combustion, which results in piston crown breakdown and cylinder head erosion. Spray-wall impingement and pool fires are considered potential causes; however, the detailed mechanism remains poorly understood owing to the lack of research data. In this study, for the first time, the destructive abnormal combustion induced by diesel spray-wall impingement was identified using

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9

Raghu, P., K. Thilagan, M. Thirumoorthy, Siddharth Lokachari, and N. Nallusamy. "Spray Characteristics of Diesel and Biodiesel in Direct Injection Diesel Engine." Advanced Materials Research 768 (September 2013): 173–79. http://dx.doi.org/10.4028/www.scientific.net/amr.768.173.

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Alternative fuels for diesel engines are becoming important due to the decrease of petroleum reservoirs and the increase of environment pollution problems. The biodiesel is technically competitive with conventional petroleum-derived diesel fuel and requires no changes in the fuel distribution system. Injection process of biodiesel influences the atomization and dispersion of fuel in the combustion chamber. In diesel Engine different tests have been performed to improve the efficiency in cycle, power, less emission, speed, etc. There are various methods of visualizing the combustion chamber in

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10

Duronio, Francesco, Angelo De De Vita, Alessandro Montanaro, and Luigi Allocca. "Experimental Investigation and Numerical CFD Assessment of a Thermodynamic Breakup Model for Superheated Sprays with Injection Pressure up to 700 Bar." Fluids 8, no. 5 (2023): 155. http://dx.doi.org/10.3390/fluids8050155.

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Among the most relevant fields of research recently investigated for improving the performance of gasoline direct injection (GDI) engines, there are ultrahigh injection pressures and the flash-boiling phenomenon. Both perform relevant roles in improving the air/fuel mixing process, reducing tailpipe emissions and implementing new combustion methods. When a high-temperature fuel is released into an environment with a pressure lower than the fuel’s saturation pressure, flash boiling occurs. Due to complex two-phase flow dynamics and quick droplet vaporization, flash boiling can significantly mod

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11

He, Zhixia, Tiemin Xuan, Yanru Xue, Qian Wang, and Liang Zhang. "A numerical study of the effects of injection rate shape on combustion and emission of diesel engines." Thermal Science 18, no. 1 (2014): 67–78. http://dx.doi.org/10.2298/tsci130810013h.

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The spray characteristics including spray droplet sizes, droplet distribution, spray tip penetration length and spray diffusion angle directly affects the mixture process of fuel and oxygen and then plays an important role for the improvement of combustion and emission performance of diesel engines. Different injection rate shapes may induce different spray characteristics and then further affect the subsequent combustion and emission performance of diesel engines. In this paper, the spray and combustion processes based on four different injection rate shapes with constant injection duration a

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12

Zhong, Shenghui, Shijie Xu, Xue-Song Bai, et al. "Combustion characteristics of n-heptane spray combustion in a low temperature reform gas/air environment." Fuel 293 (June 2021): 120377. http://dx.doi.org/10.1016/j.fuel.2021.120377.

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Wang, Tae-Joong, and Seung-Wook Baek. "Study on Vaporization and Combustion of Spray in High Pressure Environment." Transactions of the Korean Society of Mechanical Engineers B 27, no. 9 (2003): 1273–81. http://dx.doi.org/10.3795/ksme-b.2003.27.9.1273.

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14

Wang, Xian Cheng, Jun Biao Hu, Xing He, and Meng Chao Guo. "Prediction and Analysis of Combustion Chamber Thermal Load of Heavy Vehicle at Different Altitudes." Advanced Materials Research 706-708 (June 2013): 1492–95. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.1492.

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For the thermal load of a heavy vehicle is too high in plateau environment, based on Hiroyasu spray model and predictive combustion model, a turbocharged diesel engine model with environmental adaptive predictive ability was established. The experimental results of 3700m revealed that the simulation result relative errors were less than 5%. The research of combustion chamber temperature field was made. This method provides a fundamental basis for further design of the combustion chamber.

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15

Shin, Jong-Seon, Dowon Shun, Churl-Hee Cho, Yujin Choi, and Dal-Hee Bae. "The Characteristics of the After-Combustion in a Commercial CFBC Boiler Using the Solid Waste Fuel." Energies 15, no. 15 (2022): 5507. http://dx.doi.org/10.3390/en15155507.

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A CFBC (Circulating Fluidized Bed Combustor) boiler for combusted SRF (Solid Refused Fuel) is designed for solid waste combustion and power generation. The boiler consumes about 200 tons/day of SRF and generates 60 ton/h of steam or 10 MWe in electricity. The boiler is designed to burn pelletized waste fuel made of municipal solid waste collected from a town with a population of 400,000. Heat and mass balance calculations over the combustor and at each boiler section were performed and compared between the designed and measured data to analyze the boiler’s performance. After-combustion, the mo

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16

Bari, Saiful, Chi Zhang, Fahad Kafrawi, and Kang Hei Lee. "Study of Spray Behaviors to Correlate with Engine Performance and Emissions of a Diesel Engine Using Canola-Based Biodiesel." Fuels 3, no. 1 (2022): 87–112. http://dx.doi.org/10.3390/fuels3010007.

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The use of renewable biodiesel fuel in diesel engines can reduce the demand for depleting fossil fuels and reduce harmful emissions to the environment. In this research, an engine simulation is conducted using ANSYS Forte software, which allows for visualization of the spray inside the combustion chamber. The results show that biodiesel has higher liquid and vapor penetration lengths, higher droplet mass and diameter, and a longer breakup length. Molecular images of fuel molecules show that the temperature of biodiesel molecules is 141 °C lower than diesel molecules at 709 degree crank angle (

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17

FAN, XIAOFENG, and JIANGFENG WANG. "A MARKER-BASED EULERIAN-LAGRANGIAN METHOD FOR MULTIPHASE FLOW WITH SUPERSONIC COMBUSTION APPLICATIONS." International Journal of Modern Physics: Conference Series 42 (January 2016): 1660159. http://dx.doi.org/10.1142/s2010194516601599.

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The atomization of liquid fuel is a kind of intricate dynamic process from continuous phase to discrete phase. Procedures of fuel spray in supersonic flow are modeled with an Eulerian-Lagrangian computational fluid dynamics methodology. The method combines two distinct techniques and develops an integrated numerical simulation method to simulate the atomization processes. The traditional finite volume method based on stationary (Eulerian) Cartesian grid is used to resolve the flow field, and multi-component Navier-Stokes equations are adopted in present work, with accounting for the mass excha

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18

Fang, Yuwen, Xiao Ma, Yixiao Zhang, et al. "Experimental Investigation of High-Pressure Liquid Ammonia Injection under Non-Flash Boiling and Flash Boiling Conditions." Energies 16, no. 6 (2023): 2843. http://dx.doi.org/10.3390/en16062843.

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Liquid ammonia is an ideal zero-carbon fuel for internal combustion engines. High-pressure injection is a key technology in organizing ammonia combustion. Characteristics of high-pressure liquid ammonia injection is lack of research. Spray behaviors are likely to change when a high-pressure diesel injector uses liquid ammonia as its fuel. This study uses high-speed imaging with a DBI method to investigate the liquid penetration, width, and spray tip velocity of high-pressure liquid ammonia injection up to 100 MPa. Non-flash and flash boiling conditions were included in the experimental conditi

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19

Cengiz, Cengizhan, and Salih Ozen Unverdi. "A CFD Study on the Effects of Injection Timing and Spray Inclusion Angle on Performance and Emission Characteristics of a DI Diesel Engine Operating in Diffusion-Controlled and PCCI Modes of Combustion." Energies 16, no. 6 (2023): 2861. http://dx.doi.org/10.3390/en16062861.

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In three-dimensional (3D) computational fluid dynamics (CFD) simulations, the effects of injection timing and spray inclusion angle (SIA) on performance and emissions of diffusion-controlled and Premixed Charge Compression Ignition (PCCI) combustion in part load for a heavy-duty direct injection (HDDI) diesel engine are studied. The start of injection (SOI) of a 146° SIA injector is varied between −70 and −10 °crank angle (°CA) after top dead center (ATDC). For −50 °CA ATDC SOI with various SIAs between 80° and 146°, PCCI combustion reduces mono-nitrogen oxide (NOx) emissions significantly com

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20

Wang, Chengguan, Xiaozhi Qi, Tao Wang, et al. "Role of Altitude in Influencing the Spray Combustion Characteristics of a Heavy-Duty Diesel Engine in a Constant Volume Combustion Chamber. Part I: Free Diesel Jet." Energies 16, no. 12 (2023): 4832. http://dx.doi.org/10.3390/en16124832.

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Heavy-duty diesel engines operating in plateau regions experience deteriorated combustion. However, the lack of up-to-date information on the spray-combustion process limits the fundamental understanding of the role of altitude. In this work, the in-cylinder thermodynamic conditions of a real diesel engine operating under different altitudes were reproduced in a constant-volume combustion chamber (CVCC). The liquid spray, ignition, and combustion processes were visualized in detail using different optical diagnostics. Apart from predictable results, some interesting new findings were obtained

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21

Nagareddy, Shivakumar, and Kumaresan Govindasamy. "Combustion chamber geometry and fuel supply system variations on fuel economy and exhaust emissions of GDI engine with EGR." Thermal Science 26, no. 2 Part A (2022): 1207–17. http://dx.doi.org/10.2298/tsci211020358n.

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In this study, the combustion chamber geometry for spray-guided, wall-guided, and air-guided combustion strategies were fabricated. The piston crown shape and the cylinder head in each combustion chamber geometry was machined by fixing the fuel injector and spark plug at proper positions to obtain swirl, turbulence, and squish effects for better mixing of fuel with air and superior combustion of the mixture. Conducted tests on all the three modified gasoline direct injection engines with optimized exhaust gas recirculation and electronic control towards fuel injection timing, the fuel injectio

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22

Xie, Kai, Jie Zhang, Changlin Qin, Xiufeng Tan, and Yunjing Cui. "Numerical study on flame and emission characteristics of a small flue gas self-circulation diesel burner with different spray cone angles." Thermal Science, no. 00 (2021): 150. http://dx.doi.org/10.2298/tsci201229150x.

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The problems of long flame and high pollution emissions in low-power burners are of wide concern in small heating devices. To solve this problem, a small diesel burner with self-circulation flue gas was designed herein. In order to obtain a deeper scientific understanding of the flame and emission characteristics of the burner with different spray cone angles, a numerical calculation method was used to investigate them. Reasonable flow, heat transfer, and combustion models were selected, and periodic boundary conditions were used to verify the feasibility of the numerical model. The results in

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Wang, Jun, Yan Kang, Lin Yang, Xiaolu Li, and Tianhong Yan. "Study on biodiesel heat transfer through self-temperature limit injector during vehicle cold start." Thermal Science 19, no. 6 (2015): 1907–18. http://dx.doi.org/10.2298/tsci141011177w.

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A type of Self-Temperature Limit-Injector (STL- injector) is proposed to reduce the biodiesel consumption and emission in vehicle cold start process. The STL-injector is capable of fast raising fuel temperature, which helps improve the quality of diesel spray and its combustion efficiency. A STL-injector model is established with consideration of electro-mechanic coupling and fluid-structure interaction. A transient simulation is conducted using dynamic grid technology. The results show that STL-injector can effectively raise biodiesel temperature to 350K from 300K in 32 seconds. That is to sa

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24

Singh, Rahul Kumar. "Investigation of Diesel Engine Combustion Characteristics for Varying Nozzle Depth at Different Spray Angles." ECS Transactions 107, no. 1 (2022): 9265–74. http://dx.doi.org/10.1149/10701.9265ecst.

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The demand for petroleum-derived fuels is increasing every day despite their speculations about the exhaustion of petroleum fuel. Petroleum-derived fuels are classified as a suspect element for humans due to their known primary adverse effects on the environment. The concern is that the demand for petroleum fuel will rise along with the market price. Researchers around the world focus on reducing the harmful effects of petroleum fuel or finding some other substitute for petroleum fuels. A Kirloskar single cylinder diesel engine (model TV-1) was selected for simulation using commercially availa

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Ouellette, Laura, and Vladimir Razbin. "REMEDIATION OF OIL-CONTAMINATED DEBRIS USING A ROTARY KILN COMBUSTOR." International Oil Spill Conference Proceedings 1995, no. 1 (1995): 958–59. http://dx.doi.org/10.7901/2169-3358-1995-1-958.

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ABSTRACT The Emergencies Engineering Division (EED) of Environment Canada's Environmental Technology Centre has been investigating the use of combustion to remediate oil-contaminated debris resulting from marine oil spills. Rotary kiln technology was determined to be suitable for such wastes, and offers an environmentally safe solution to this problem. The debris used for these tests were oil-contaminated gravel and sorbents. The rotary kiln tests were conducted at the Energy Research Laboratory, CANMET, Natural Resources Canada between January and February 1994. The system consists of the rot

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Datta, A., and S. K. Som. "Effects of spray characteristics on combustion performance of a liquid fuel spray in a gas turbine combustor." International Journal of Energy Research 23, no. 3 (1999): 217–28. http://dx.doi.org/10.1002/(sici)1099-114x(19990310)23:3<217::aid-er473>3.0.co;2-u.

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Kim, Namsu, Kiyoung Jung, and Yongmo Kim. "Multi-environment PDF modeling for n-dodecane spray combustion processes using tabulated chemistry." Combustion and Flame 192 (June 2018): 205–20. http://dx.doi.org/10.1016/j.combustflame.2018.02.004.

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Ganji, Prabhakara, Rajesh Raju, and Srinivasa Rao. "Computational optimization of biodiesel combustion using response surface methodology." Thermal Science 21, no. 1 Part B (2017): 465–73. http://dx.doi.org/10.2298/tsci161229031g.

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The present work focuses on optimization of biodiesel combustion phenomena through parametric approach using response surface methodology. Physical properties of biodiesel play a vital role for accurate simulations of the fuel spray, atomization, combustion, and emission formation processes. Typically methyl based biodiesel consists of five main types of esters: methyl palmitate, methyl oleate, methyl stearate, methyl linoleate, and methyl linolenate in its composition. Based on the amount of methyl esters present the properties of pongamia bio-diesel and its blends were estimated. CONVERGETM

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Li, Zhipeng, Qiang Zhang, Fujun Zhang, Hongbo Liang, and Yu Zhang. "Investigation of Effect of Nozzle Numbers on Diesel Engine Performance Operated at Plateau Environment." Sustainability 15, no. 11 (2023): 8561. http://dx.doi.org/10.3390/su15118561.

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The effect of nozzle number on the combustion and emission characteristics of diesel engines operating at high altitudes was investigated in this study. A three-dimensional computational fluid dynamics model was developed to simulate the spray spatial distribution, which is closely related to the nozzle number. The intake pressure was identified as the dominant factor under varying altitudes, while the fuel mass, injection timing and temperature were maintained constant. Altitudes of 3000 m were chosen to represent typical high-altitude conditions, and sea level cases were simulated for compar

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Poursadegh, Farzad, Oleksandr Bibik, Boni Yraguen, and Caroline L. Genzale. "A multispectral, extinction-based diagnostic for drop sizing in optically dense diesel sprays." International Journal of Engine Research 21, no. 1 (2019): 15–25. http://dx.doi.org/10.1177/1468087419866034.

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Diesel sprays present a challenging environment for detailed quantitative measurement of the liquid field, and to date, there have been only a few efforts to characterize drop sizes within the family of Engine Combustion Network (ECN) diesel sprays. Drop sizing diagnostics, including optical microscopy and Ultra-Small Angle X-ray Scattering (USAXS), have been recently demonstrated in Spray A/D ECN activities, but little data exist to validate these results. This work therefore seeks to extend the available ECN data on the liquid phase field and provide a new comparative data set for assessment

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Lee, Hyungmin. "Spray, Combustion, and Air Pollutant Characteristics of JP-5 for Naval Aircraft from Experimental Single-Cylinder CRDI Diesel Engine." Energies 14, no. 9 (2021): 2362. http://dx.doi.org/10.3390/en14092362.

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This study was performed to analyze the spray, combustion, and air pollutant characteristic of JP-5 fuel for naval aircraft in a spray visualization system and a single-cylinder CRDI diesel engine that can be visualized. The analysis results of JP-5 fuel were compared with DF. The spray tip penetration of JP-5 showed diminished results as the spray developed. JP-5 had the highest ROHR and ROPR regardless of the fuel injection timings. The physicochemical characteristics of JP-5, such as its excellent vaporization and low cetane number, were analyzed to prolong the ignition delay. Overall, the

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Payri, Raul, Pedro Marti-Aldaravi, Rami Abboud, and Abian Bautista. "Numerical Analysis of GDI Flash Boiling Sprays Using Different Fuels." Energies 14, no. 18 (2021): 5925. http://dx.doi.org/10.3390/en14185925.

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Modeling the fuel injection process in modern gasoline direct injection engines plays a principal role in characterizing the in–cylinder mixture formation and subsequent combustion process. Flash boiling, which usually occurs when the fuel is injected into an ambient pressure below the saturation pressure of the liquid, is characterized by fast breakup and evaporation rates but could lead to undesired behaviors such as spray collapse, which significantly effects the mixture preparation. Four mono–component fuels have been used in this study with the aim of achieving various flashing behaviors

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Mai, Zhaoming, Yang Liu, Chenglong Tang, and Zuohua Huang. "Experimental Investigation on Auto-Ignition Characteristics of Kerosene Spray Flames." Machines 10, no. 8 (2022): 601. http://dx.doi.org/10.3390/machines10080601.

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To facilitate the better use of RP-3 kerosene in compression ignition engines, the auto-ignition behaviors of RP-3 kerosene spray were experimentally investigated in an optical rapid compression machine. Results show that most of the tests have good ignitability and combustion performance. For all the successful ignited cases, the flame kernel was found to be formed before the steep rise of pressure, which explained that image-based ignition delay time is always shorter than the pressure-based ignition delay time. The effects of ambient environment, injection pressure, and injection delay time

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Khatamnezhad, Hassan, Shahram Khalilarya, Samad Jafarmadar, and Arash Nemati. "Incorporation of EGR and split injection for reduction of nox and soot emissions in DI diesel engines." Thermal Science 15, suppl. 2 (2011): 409–27. http://dx.doi.org/10.2298/tsci100317019k.

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In this paper, reduced temperature combustion has been investigated at high load condition of a DI diesel engine. A three dimensional CFD model for flow field, spray, air-fuel mixture formation, combustion and emissions formation processes have been used to carry out the computations. The combined effect of EGR temperature and EGR rate was analyzed to choose with consideration of engine performance. Then, the influence of different injection rates and split injection was explored at a reduced temperature combustion condition by the use of EGR. The results represent sensitiveness of various inj

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Du, Wei, Qiankun Zhang, Meng Li, and Jinchi Hou. "Ignition and combustion characteristics of wall-impinged kerosene (RP-3) fuel spray with varying injection parameters." Thermal Science 24, no. 1 Part A (2020): 171–81. http://dx.doi.org/10.2298/tsci190118169d.

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The fuel quantity and injection pressure are two essential factors to optimize the injection strategy. In this paper, we focus on the investigation for the ignition and combustion characteristics of wall-impinged kerosene (RP-3) fuel spray at different injection quantities and pressures. Experiments are conducted in a constant volume combustion vessel to simulate the Diesel engine condition, adopting a single-hole nozzle with 0.22 mm. The flame images are captured using a high-speed camera, and then the behaviors of ignition and combustion are processed and analyzed. The main emphasis is place

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Xie, Kai, Xingqi Qiu, Yunjing Cui, and Jianxin Wang. "Experimental study on the effect of spray cone angle on the characteristics of horizontal jet spray flame under sub-atmospheric pressure." Thermal Science 24, no. 5 Part A (2020): 2941–52. http://dx.doi.org/10.2298/tsci181106014x.

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The burning state of a plateau environment is attracting more and more attention. In this paper, in order to have a deeper scientific understanding of diesel spray combustion and the characteristics of a flame under different spray cone angles in a plateau environment, experiments were carried out in a low pressure chamber. The flame morphology was recorded by a high speed video instrument, and the temperature change was recorded by a thermal imager and thermocouples. The MATLAB programming was used to process the video image of the flame, and the probability of its binarization was calculated

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Csemány, Dávid, and Viktor Józsa. "A Two-Parameter Corresponding States Method for Calculating the Steady-State Evaporation Rate of C2–C9 n-Alkane Droplets in Air for Elevated Pressures and Temperatures." Flow, Turbulence and Combustion 107, no. 2 (2021): 283–305. http://dx.doi.org/10.1007/s10494-020-00238-7.

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AbstractAdvanced gas turbine and internal combustion engine combustion chambers operate at highly elevated pressures and temperatures. Therefore, spray vaporization analysis cannot be limited to the atmospheric environment since evaporation strongly depends on ambient conditions. Presently, the effect of air pressure and temperature on droplet evaporation rate was investigated by using both a transient and a steady-state approach. A corresponding states model was derived for the steady-state evaporation rate for n-alkanes in the range of C2–C9 with an excellent fit quality and < 1% model un

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Liu, Fushui, Ziming Yang, Yikai Li, and Han Wu. "Experimental study on the combustion characteristics of impinging diesel spray at low temperature environment." Applied Thermal Engineering 148 (February 2019): 1233–45. http://dx.doi.org/10.1016/j.applthermaleng.2018.12.016.

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Watanabe, Hirotatsu, Yoshikazu Suwa, Yohsuke Matsushita, et al. "Spray combustion simulation including soot and NO formation." Energy Conversion and Management 48, no. 7 (2007): 2077–89. http://dx.doi.org/10.1016/j.enconman.2007.01.008.

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Mao, Jun Yuan, and Wei Gang Zheng. "Research on Laser Remelting of Plasma Sprayed Ceramic Nanometer Coatings on the Inner Wall of the Cylinder Liner." Advanced Materials Research 912-914 (April 2014): 301–4. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.301.

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The Cylinder liner is one of the working environment of the worst parts in internal combustion engine ,it is required to have good wear resistance, corrosion resistance, resistance to high temperature and high pressure shock, etc. After tests showed, better comprehensive mechanical properties of cylinder liner is got by using Plasma Spray composite ceramic nanometer coating technology, and after laser remelting treatment.

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Baek, Hyun Min, and Hyung Min Lee. "Spray Behavior, Combustion, and Emission Characteristics of Jet Propellant-5 and Biodiesel Fuels with Multiple Split Injection Strategies." Energies 15, no. 7 (2022): 2540. http://dx.doi.org/10.3390/en15072540.

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This study focuses on an analysis of the spray behavior, combustion, and emission characteristics of jet propellant-5 (JP-5) and biodiesel fuels with single-injection timing and multiple split injection strategies in a common rail direct injection (CRDI) single-cylinder diesel engine system. The analysis includes visualization of the spray and combustion. Multiple split injection strategies (e.g., double, triple, quadruple, and quintuple) were considered by equally distributing the fuel injection amount within the single-injection. Injection of biodiesel has a delayed start (0.2 ms) as well as

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Kawahara, Hideo, Konosuke Furukawa, Koichiro Ogata, Eiji Mitani, and Koji Mitani. "Experimental Study on the Stabilization Mechanism of Diffusion Flames in a Curved Impinging Spray Combustion Field in a Narrow Region." Energies 14, no. 21 (2021): 7171. http://dx.doi.org/10.3390/en14217171.

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HVAF (High Velocity Air Flame) flame spraying can generate supersonic high-temperature gas jets, enabling thermal spraying at unprecedented speeds. However, there is a problem with the energy cost of this device. This study focused on combustors that used cheap liquid fuel (kerosene) as the fuel for HVAF. In this research, we have developed a compact combustor with a narrow channel as a heat source for the HVAF heat atomizer. Using this combustor, the stability of the flame formed in the combustor, the morphology of the flame, and the temperature behavior in the combustion chamber were investi

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Ziółkowski, Paweł, Stanisław Głuch, Piotr Józef Ziółkowski, and Janusz Badur. "Compact High Efficiency and Zero-Emission Gas-Fired Power Plant with Oxy-Combustion and Carbon Capture." Energies 15, no. 7 (2022): 2590. http://dx.doi.org/10.3390/en15072590.

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Reduction of greenhouse gases emissions is a key challenge for the power generation industry, requiring the implementation of new designs and methods of electricity generation. This article presents a design solution for a novel thermodynamic cycle with two new devices—namely, a wet combustion chamber and a spray-ejector condenser. In the proposed cycle, high temperature occurs in the combustion chamber because of fuel combustion by pure oxygen. As a consequence of the chemical reaction and open water cooling, a mixture of H2O and CO2 is produced. The resulting working medium expands in one tu

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Jiang, Tsung Leo, and Huei-Huang Chiu. "Combustion of a Fuel Droplet Surrounded by Oxidizer Droplets." Journal of Heat Transfer 113, no. 4 (1991): 959–65. http://dx.doi.org/10.1115/1.2911228.

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The interaction between a burning fuel droplet and satellite oxidizer droplets is studied analytically. The effects of droplet spacing and droplet size ratio on the flame configuration of a burning fuel droplet with a satellite oxidizer droplet are analyzed in a high-temperature oxidizing environment by using the bispherical coordinate system. Three combustion modes including normal combustion, conjugate combustion, and composite combustion are identified at appropriate droplet size ratio and droplet spacing. The burning rate of the fuel droplet is found to be greater than that of an isolated

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Haq, Muteeb Ul, Ali Turab Jafry, Saad Ahmad, Taqi Ahmad Cheema, Munib Qasim Ansari, and Naseem Abbas. "Recent Advances in Fuel Additives and Their Spray Characteristics for Diesel-Based Blends." Energies 15, no. 19 (2022): 7281. http://dx.doi.org/10.3390/en15197281.

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The spray characteristics play a crucial role in determining the performance and emissions of compression ignition (CI) engines at the pre-combustion stage. With the advent of many types of alternative fuels and their blends with diesel, it is necessary to investigate the effect of fuel properties and various injection conditions to determine the penetration length, spray cone angle and spray area for a viable fuel with similar or better dispersion characteristics to diesel. Hence, this study reviews and summarizes the spray visualization techniques, along with in depth analysis of macroscopic

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Chatelier, Adrien, Benoît Fiorina, Vincent Moureau, and Nicolas Bertier. "Large Eddy Simulation of a Turbulent Spray Jet Flame Using Filtered Tabulated Chemistry." Journal of Combustion 2020 (March 19, 2020): 1–23. http://dx.doi.org/10.1155/2020/2764523.

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This work presents Large Eddy Simulations of the unconfined CORIA Rouen Spray Burner, fed with liquid n-heptane and air. Turbulent combustion modeling is based on the Filtered TAbulated Chemistry model for LES (F-TACLES) formalism, designed to capture the propagation speed of turbulent stratified flames. Initially dedicated to gaseous combustion, the filtered flamelet model is challenged for the first time in a turbulent spray flame configuration. Two meshes are employed. The finest grid, where both flame thickness and wrinkling are resolved, aims to challenge the chemistry tabulation procedur

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Boussouara, Karima, and Mahfoud Kadja. "Empirical soot formation and oxidation model." Thermal Science 13, no. 3 (2009): 35–46. http://dx.doi.org/10.2298/tsci0903035b.

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Modelling internal combustion engines can be made following different approaches, depending on the type of problem to be simulated. A diesel combustion model has been developed and implemented in a full cycle simulation of a combustion, model accounts for transient fuel spray evolution, fuel-air mixing, ignition, combustion, and soot pollutant formation. The models of turbulent combustion of diffusion flame, apply to diffusion flames, which one meets in industry, typically in the diesel engines particulate emission represents one of the most deleterious pollutants generated during diesel combu

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Guo, Genmiao, Zhixia He, Xicheng Tao, Shenxin Sun, Zhen Zhou, and Xiongbo Duan. "Optical experiments of string cavitation in diesel injector tapered nozzles." Thermal Science 24, no. 1 Part A (2020): 193–201. http://dx.doi.org/10.2298/tsci180405005g.

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Flow inside the diesel nozzle is crucial to spray, combustion, and emissions. This work aimed to improve the understanding of effects of internal fuel-flow on diesel spray, especially the special string cavitating flow. Optical experiments were employed for characterizing the formation of string cavitation inside the transparent scaled-up tapered diesel orifices. Simultaneously, the corresponding evolution of spray cone angles were obtained. Results show that there were two origins of the string cavitation, which were originated from inlet and outlet of the orifice, respectively. Moreover, the

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Liu, Yu, Jun Li, and Chao Jin. "Fuel spray and combustion characteristics of butanol blends in a constant volume combustion chamber." Energy Conversion and Management 105 (November 2015): 1059–69. http://dx.doi.org/10.1016/j.enconman.2015.08.047.

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Djamari, Djati Wibowo, Muhammad Idris, Permana Andi Paristiawan, et al. "Diesel Spray: Development of Spray in Diesel Engine." Sustainability 14, no. 23 (2022): 15902. http://dx.doi.org/10.3390/su142315902.

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Research and development in the internal combustion engine (ICE) has been growing progressively. Issues such as air pollution, fuel cost, and market competitiveness have driven the automotive industry to develop and manufacture automobiles that meet new regulation and customers’ needs. The diesel engine has some advantages over the gasoline or spark ignition engine, including higher engine efficiency, greater power output, as well as reliability. Since the early stage of the diesel engine’s development phase, the quest to obtain better atomization, proper fuel supply, and accurate timing contr

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