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Dissertations / Theses on the topic 'Combustion ratio'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Lundin, Eva. "Adaptive air-fuel ratio control for combustion engines." Thesis, Linköping University, Department of Electrical Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56651.

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<p>Around the world, vehicle emission regulations become stricter, increasing exhaust emission demands. To manage these rules and regulations, vehicle manufacturers put a lot of effort into minimizing the exhaust emissions. The three-way catalytic converter was developed, and today it is the most commonly used device to control the exhaust emissions.</p><p>To work properly the catalytic converter needs to control the air-fuel mixture with great precision. This then increases the demands on the engine management systems, causing them to become more complex. With increased complexity, the time e

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2

Brandstetter, Markus. "Robust air-fuel ratio control for combustion engines." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627144.

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3

Kirtaş, Mehmet. "Large Eddy Simulation of a High Aspect Ratio Combustor." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14134.

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The present research investigates the details of mixture preparation and combustion in a two-stroke, small-scale research engine with a numerical methodology based on large eddy simulation (LES) technique. A major motivation to study such small-scale engines is their potential use in applications requiring portable power sources with high power density. The investigated research engine has a rectangular planform with a thickness very close to quenching limits of typical hydrocarbon fuels. As such, the combustor has a high aspect ratio (defined as the ratio of surface area to volume) that makes

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4

De, Zoysa Merrenna Manula. "Neural network estimation of air-fuel ratio in internal combustion engines." Thesis, University of Brighton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399048.

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This thesis presents an investigation into a novel method of estimating the air-fuel ratio of a gasoline-fuelled spark-ignition internal combustion engine. The measurement of the air-fuel ratio is important for controlling an engine to reduce exhaust emissions. In production vehicles, the air-fuel ratio is measured using an exhaust gas analyser and the exhaust emissions are reduced by using electronically controlled three-way catalytic converters, which are expensive and subject to operationallimitations such as, requiring the engine to operate with a stoichiometric air-fuel ratio. A micro-pro

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5

Grant, Marcus Paul. "Computer control of air-gas ratio for nozzle mix systems." Thesis, Coventry University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390222.

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6

TEIXEIRA, RENATO NUNES. "INTERNAL COMBUSTION ENGINES WITH VARIABLE COMPRESSION RATIO: A THEORETICAL AND EXPERIMENTAL ANALYSIS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1992. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19099@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>É realizado um estudo teórico experimental sobre motores a combustão interna operando com taxa de compressão variável. É feita uma análise teórica sobre determinado mecanismo que permite variar a taxa de compressão. Para tal foi utilizado um programa de simulação para motores com ignição por centelha. No presente trabalho o modelo de simulação foi aprimorado, com a inclusão de previsão de detonação, de emissão de hidrocarbonetos, do cálculo da potencia de atrito, ass

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7

Alshuqaiq, Mohammad Abdullah. "An Analysis of Oil Combustion on Snow." Digital WPI, 2014. https://digitalcommons.wpi.edu/etd-theses/789.

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Several Arctic council reports conclude that oil spills are the most significant threat to the Arctic ecosystem. Some studies have shown that in-situ burning (ISB) of oil spills over water can remove more than 90% of the oil, and is the most promising technology for an efficient response to oil spills in the Arctic region. The definition of "In situ" is intentional, controlled burning of oil in place (i.e., without extracting or removing the oil first). Earlier studies [Bellino (WPI 2012), Farahani, (WPI 2014)] have investigated burning behavior of crude oil on ice, similar to what one would

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8

Kamal, Rajit. "CFD simulation of mixing in a carbon black reactor : optimum geometry and momentum ratio." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/11254.

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9

Petrolati, Andrea. "Fate of nitrogen/trace metals species during combustion and gasification of biomass." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/7011.

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This thesis focused on the fate of nitrogen and trace metals species from combustion and gasification of biomass. The effect of process parameters on the release of these species during pilot-scale combustion and gasification of biomass was investigated and the information used to identify methods for the reduction of these species. The investigation focused on Miscanthus and Dried distillers’ grains with solubles (DDGS). The pilot-scale test rigs used were a fluidised-bed combustor and a fixed-bed downdraft gasifier. The two fuels were analysed by means of proximate, ultimate and ash analysis

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10

Faulkner, Jason Christopher. "A study of ignition and flame propagation in a small, high surface-to-volume ratio combustor." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/12439.

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11

Disseau, Mael Leo David Soliman. "Development and investigation of a small, high aspect ratio, two-stroke engine." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/12485.

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12

Aivaz, Balian Razmik. "The effect of compression ratio on the performance of a direct injection diesel engine." Thesis, Brunel University, 1990. http://bura.brunel.ac.uk/handle/2438/11249.

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This thesis considers the effect of compression ratio on the performance of a direct injection diesel engine. One aspect of engine performance is considered in great detail, namely the combustion performance at increased clearance volume. This aspect was of particular interest because variable compression ratio (VCR) systems normally operate by varying the clearance volume. The investigation relied upon results obtained both from experimental and computer simulating models. The experimental tests were carried out using a single-cylinder direct-injection diesel engine, under simulated turbochar

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13

Postma, Marius. "Air-fuel ratio control in spark ignition internal combustion engines using switching LPV techniques." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/30499.

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The Three-Way Catalytic Converter (TWC) is a critical component for the mitigation of tailpipe emissions of modern Internal Combustion (IC) engines. Because the TWC operates effectively only when a stoichiometric ratio of air and fuel is combusted in the engine, accurate control of the air-fuel ratio is required. To track the desired ratio, a switching Linear Parameter Varying (LPV) air-fuel ratio feedback controller, scheduled based on engine speed and air flow, and providing guaranteed L2 performance, is introduced. The controller measures the air-fuel ratio in the exhaust flow using a Unive

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14

MacMillan, David James. "Influences on the cold start behaviour of a diesel engine at reduced compression ratio." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10759/.

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The design trend for light duty diesel engines is towards lower compression ratio and higher turbocharger boost. This can enable higher specific power and lower pollutant emissions to be achieved, but raises concerns that cold start operation might be adversely affected. This is investigated and quantified through the study of a modern light duty diesel engine at two compression ratios and temperatures down to -20ºC. Key indicators of cold start performance are the magnitude and cycle-to-cycle variation of indicated mean effective pressure. Initial studies were carried out at 300 rpm, a speed

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15

Williams, Benjamin Ashley Oliver. "Quantitative laser diagnostics for combustion." Thesis, University of Oxford, 2009. http://ora.ox.ac.uk/objects/uuid:37ea0034-03ac-4021-80e3-5d72200fbd0e.

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Quantitative Planar Laser Induced Fluorescence (QPLIF) is developed as a diagnostic technique and then applied to a prototype Jaguar optical internal combustion engine. QPLIF derives quantitative, two-dimensional, spatially-resolved measurements of fuel concentration. This work reports the first demonstration of a fully-fractionated surrogate fuel which exhibits all the characteristics of a typical gasoline. This 'pseudo' fuel, developed in association with Shell UK, is blended to accept a fluorescent tracer which may track one of the light, middle or heavy fractions of the fuel, each of diffe

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16

Stewart, Marcus Clayton. "Design and analysis of a variable-compression, ratio internal-combustion engine : the Alvar engine concept." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43419.

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17

Wirth, Douglas A. "An experimental investigation of the effect of temporal equivalence ratio fluctuations on NO_x emissions in premixed flames." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/37948.

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18

Harris, Charles G. "Development of air/fuel ratio control and secondary combustion for a commercial-scale biomass-fueled boiler." Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/76044.

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The development, testing, and modeling of a multi-fuel biomass combustion system is described. The system is developed by adding air/fuel ratio control and catalytic secondary combustion to a commercially available 150 kW biomass-fueled boiler. The basis of the air/fuel ratio control system is an inexpensive electrochemical oxygen sensor. A catalytic secondary combustion system is developed from monolithic noble metal catalytic combustor segments commonly used on domestic wood burning equipment. The development and understanding of the combustion system is supported by both experimental measur

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19

Woodbury, Simon Edward. "Application of gas chromatography combustion-isotope ratio mass spectrometry to the detection of adulteration of vegetable oils." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246268.

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20

Bilel, Gaaloul. "Modeling of internal combustion engine control processes." Master's thesis, Сумський державний університет, 2021. https://essuir.sumdu.edu.ua/handle/123456789/86782.

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The control system has been suggested to convert the nonlinear model to a linearized plant model. Therefore, we characterized the engine model based on certain aspects and analyzed it accurately to fit in the system. Simulations were performed using the PID controller to regulate and maintain the output response while rejecting any input disturbance. An engine model of a control system shows an essential role in defining the correct parameters. Hence, Idle speed control is the principal of the highest confrontations for the automotive industry and developers as they were addressing many issues

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21

Mathias, Spencer D. "Investigation of Thermoplastic Polymers and Their Blends for Use in Hybrid Rocket Combustion." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7416.

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This thesis set out to find a blend of thermoplastics that had better combustion properties than the current ABS (acrylonitrile butadiene styrene) plastic or “Lego TM plastic” used by Utah State University. The current work is in an effort to eliminate toxic propellants from small space applications. High and low density polyethylene plastics were used because they are common plastic waste items. In this way rocket fuel can be made from these items to reduce the waste found in landfills. Three plastics were considered for replacement and as mixture components with the ABS plastic, namely low a

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22

Ahuja, Vivek Hartfield Roy J. "Optimization of fuel-air mixing for a scramjet combustor geometry using CFD and a genetic algorithm." Auburn, Ala, 2008. http://hdl.handle.net/10415/1406.

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23

Shakya, Rikesh. "Mass Airflow Sensor and Flame Temperature Sensor for Efficiency Control of Combustion Systems." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1447679976.

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24

Ghomashi, Hossein. "Modelling the combustion in a dual fuel HCCI engine : investigation of knock, compression ratio, equivalence ratio and timing in a Homogeneous Charge Compression Ignition (HCCI) engine with natural gas and diesel fuels using modelling and simulation." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/7344.

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This thesis is about modelling of the combustion and emissions of dual fuel HCCI engines for design of “engine combustion system”. For modelling the combustion first the laminar flamelet model and a hybrid Lagrangian / Eulerian method are developed and implemented to provide a framework for incorporating detailed chemical kinetics. This model can be applied to an engine for the validation of the chemical kinetic mechanism. The chemical kinetics, reaction rates and their equations lead to a certain formula for which the coefficients can be obtained from different sources, such as NASA polynomia

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25

Tunestål, Per. "Estimation of the in-cylinder air/fuel ratio of an internal combustion engine by the use of pressure sensors /." Lund, 2001. http://www.lub.lu.se/luft/diss/tec432_transit.html.

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26

Rundin, Patrick. "Evaluation of a statistical method to use prior information in the estimation of combustion parameters." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6255.

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<p>Ion current sensing, where information about the combustion process in an SI-engine is gained by applying a voltage over the spark gap, is currently used to detect and avoid knock and misfire. Several researchers have pointed out that information on peak pressure location and air/fuel ratio can be gained from the ion current and have suggested several ways to estimate these parameters.</p><p>Here a simplified Bayesian approach was taken to construct a lowpass-like filter or estimator that makes use of prior information to improve estimates in crucial areas. The algorithm is computationally

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27

Meyer, Jason Andrew. "Innovations in Representation and Calibration of Residual Gas Fraction and Volumetric Efficiency in a Spark Ignited, Internal Combustion Engine." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211990310.

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28

Kim, Chung-Gong. "A crank angle resolved CIDI engine combustion model with arbitrary fuel injection for control purpose." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5num=osu1086154960.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xxiv, 266 p. : ill. (some col.). Advisor: Yann G. Guezennec, Dept. of Mechanical Engineering. Includes bibliographical references (p. 259-266).

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29

Cambridge, Shevonn Nathaniel. "The effect of compression ratio on emissions from an alcohol-fueled engine." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09122009-040220/.

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30

Nori, Venkata Narasimham. "Modeling and analysis of chemiluminescence sensing for syngas, methane and jet-A combustion." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24681.

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Thesis (Ph.D.)--Aerospace Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Seitzman, Jerry; Committee Member: Jagoda, Jechiel; Committee Member: Lieuwen, Tim; Committee Member: Menon, Suresh; Committee Member: Docquier, Nicolas; Committee Member: Huey, Gregory.

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31

Vittori, Ruggero Maria. "Experimental study on the effect of stoichiometric air/fuel ratio of three binary oxygenated fuel blends on combustion and emissions of a heavy duty Diesel engine." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18203/.

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Low Temperature Combustion (LTC) is believed to be the best solution to the Diesel NOx and soot emissions trade-off: the latest development in LTC methods is PPC (Partially Premixed Combustion) which can be considered as a combination of Homogeneous Charge Compression Ignition (HCCI) and conventional Diesel combustion. The increasing interest in high-octane alternative fuels, such as alcohols and aromatic compounds, leads to investigate their combustion behaviour, in order to develop cleaner fuels, making another small step towards new cleaner engines. In this thesis, three binary oxygenated

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32

Albayrak, Alp [Verfasser], Wolfgang [Akademischer Betreuer] Polifke, Wolfgang [Gutachter] Polifke, and Aimee S. [Gutachter] Morgans. "Time Scales of Equivalence Ratio and Inertial Waves in Unsteady Combustion Dynamics / Alp Albayrak ; Gutachter: Wolfgang Polifke, Aimee S. Morgans ; Betreuer: Wolfgang Polifke." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1184476918/34.

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33

Malfatti, Laércio. "Análise qualitativa do ciclo real e tempo de combustão em um motor padrão ASTM-CFR operando com mistura de gasolina e etanol hidratado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/19041.

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A duração da combustão tem implicação direta na determinação do trabalho negativo no ciclo motor. A duração da combustão tem relação inversa com a velocidade de propagação da chama. Assim, quanto maior a velocidade de propagação da chama, menor a duração da combustão. Além disto, a duração da combustão está relacionada com a relação volumétrica de compressão, com a razão de mistura e com o tipo de combustível, entre outros fatores. Neste sentido, quanto maior a velocidade de queima da mistura ar-combustível, menor o trabalho negativo no ciclo. Neste contexto, foram ensaiadas 3 relações de comp

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34

Jääskö, Pontus, and Petter Morén. "Internal combustion engine durability monitor : Identifying and analysing engine parameters affecting knock and lambda." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-25498.

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This study has been performed at Powertrain Engineering Sweden AB (PES), a fully owned subsidiary of Volvo Cars Group, which is constantly working to develop and improve internal combustion engines. As part of this work, durability tests are performed to analyse the impact of wear on the engines. At present, there is a strong focus on visual inspections after the engines have undergone durability tests. PES wants to develop a method where collected data from these tests can be used to explain how the phenomenon of knocking and the control of lambda changes over time. The study analyses one spe

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35

Clapperton, Allan Thomas. "Development of new techniques to measure insulin sensitivity using ¹³c-glucose, gas chromatography/combustion/isotope ratio mass spectrometry and the minimal model of glucose kinetics." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616085.

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36

Reboux, Josué. "Une nouvelle approche de la fluorescence induite par laser pour la détermination de la richesse à haute pression. Application à l'étude de la combustion dans un moteur à allumage commandé." Rouen, 1995. http://www.theses.fr/1995ROUES026.

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L'objectif de cette étude est de fournir un nouvel outil pour la mesure du rapport carburant-air (richesse) dans la chambre de combustion d'un moteur à allumage commandé. Cette méthode de diagnostic optique, basée sur une nouvelle approche de la fluorescence induite par laser, profite de l'effet des désexcitations collisionnelles non radiatives (quenching). Le toluène présent dans une faible proportion (5% dans l'iso-octane) est utilisé comme traceur pour visualiser la distribution du carburant. Un laser à excimère KRF (248 nm) bande large est utilisé pour induire la fluorescence du toluène. D

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37

Ding, Yi. "Application de la chimiluminescence de flamme et du courant d’ionisation à la surveillance de l’état de combustion pour une chaudière à gaz domestique." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC039/document.

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Les variations de la composition des gaz naturels nécessitent un system de réglage automatique de la richesse de flamme pour des chaudières domestiques à gaz. Dans ce travail,deux solutions potentielles sont étudiées, à savoir la chimiluminescence de flamme et le courant d’ionisation. Des indicateurs de richesse sont déduits des signaux de chimiluminescence obtenus expérimentalement. L’impact de l’échange de chaleur entre la flamme et le brûleur sur des signaux de chimiluminescence est ensuite étudié. Une analyse est également faite des principaux facteurs pouvant perturber la caractérisation

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38

Lezzar, Balahouane. "Contribution à l'étude de la combustion et des limites de fonctionnement dans un monocylindre à taux de compression variable alimenté au méthane, au gaz de groningue et avec un mélange méthane-éthane." Valenciennes, 1987. https://ged.uphf.fr/nuxeo/site/esupversions/0d1a9c0a-0df4-4fab-8206-316c90031798.

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39

Benzler, Thorsten [Verfasser], and Christof [Akademischer Betreuer] Schulz. "Photo-physical characterization of aromatic compounds for laser-induced fluorescence based diagnostics of fuel concentration, temperature, and equivalence ratio in practical combustion processes / Thorsten Benzler ; Betreuer: Christof Schulz." Duisburg, 2019. http://d-nb.info/1191691314/34.

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40

Cho, Ju Hyeong. "Analysis of the Wave Scattering From Turbulent Premixed Flame." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11494.

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A theoretical investigation of acoustic wave interactions with turbulent premixed flames was performed. Such interactions affect the characteristic unsteadiness of combustion processes, e.g., combustion instabilities. The small perturbation method (SPM) was utilized to evaluate the scattered fields as a result of the flame-wave interaction at the instantaneous wrinkling surface of a randomly moving turbulent flame. Stochastic analysis of ensemble-averaged net acoustic energy was conducted to examine coherent and incoherent acoustic energy amplification /damping by the interaction. Net acoustic

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41

Tea, Gabrielle [Verfasser], and Christof [Akademischer Betreuer] Schulz. "Development and exploitation of optical diagnostic techniques for simultaneous 2D temperature and equivalence ratio measurements for the understanding of combustion phenomena in reciprocating engine / Gabrielle Tea. Betreuer: Christof Schulz." Duisburg, 2015. http://d-nb.info/1066206333/34.

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42

Faust, Stephan [Verfasser], Christof [Akademischer Betreuer] Schulz, and Volker [Akademischer Betreuer] Sick. "Characterisation of organic fuel tracers for laser-based quantitative diagnostics of fuel concentration, temperature, and equivalence ratio in practical combustion processes / Stephan Martin Faust. Gutachter: Volker Sick. Betreuer: Christof Schulz." Duisburg, 2013. http://d-nb.info/1035599686/34.

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43

Bábíček, Ondřej. "Návrh řízení spalovací komory." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444302.

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The subject of the diploma thesis is research of the testing process exhaust clamps. There is a description of a testing device designed to provide simulations of the real operating conditions on an exhaust assembly. The testing device is named the Hot Gas Test Bench. The thesis solves the optimization process of the test setup by determining the optimal fuel ratio, which is given by air flow as oxidizer and flow of natural gas as fuel. The input parameters which provide flow of mentioned fluids are speeds of blowers. In diploma thesis is created a design of initialization and control process

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44

Morin, Julien. "Etudes expérimentales des réactions des radicaux OH et des atomes d’oxygène d’intérêt pour l’atmosphère et la combustion." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2034/document.

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L’objectif de ce travail consiste à étudier, d’une part, les réactions des nitrates d’alkyles avec OH qui ont un intérêt atmosphérique, et d’autre part, les réactions des radicaux OH avec les alcanes et des atomes d’oxygène avec les oléfines qui ont un intérêt pour la combustion. Toutes les réactions ont été étudiées dans des réacteurs à écoulement à basse pression, y compris le réacteur à écoulement à haute température mis en place dans le cadre de la thèse, couplés à un spectromètre de masse quadripolaire à ionisation par impact électronique. Pour les réactions OH + nitrate d’alkyle, la dépe

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45

Messedi, Nouri. "Contribution à l'étude du comportement d'un moteur à taux de compression variable alimenté au méthane." Valenciennes, 1986. https://ged.uphf.fr/nuxeo/site/esupversions/0f357994-0e2f-428c-be57-1551bb305d52.

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Une partie expérimentale étudie l'influence de la richesse du mélange carburant et des paramètres de fonctionnement d'un moteur monocylindre, quatre temps sur la combustion et les conditions d'apparition du cliquetis en faisant une comparaison méthane/super carburant. Cette étude est complétée par le développement d'un programme de calcul du cycle théorique qui permet de déterminer les pressions et températures ainsi que l'évolution des produits de combustion au cours du cycle.

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46

Costa, Fabiano Tadeu Mathias. "Estimação da relação ar-combustível utilizando o sinal de pressão no cilindro em um motor ciclo Otto a etanol." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-12022016-115907/.

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A crescente demanda de diminuição das emissões e redução do consumo dos motores de combustão interna exige a melhoria dos métodos para diagnose, em tempo real, e para melhor controle do processo de combustão. Portanto, é desejável determinar a relação ar-combustível sobre uma extensa faixa de condições de operação para obter um melhor controle do motor. Este trabalho apresenta a aplicação do Método dos Momentos para obtenção de um modelo de estimação da relação ar-combustível, através do sinal de pressão no cilindro, em um motor ciclo Otto a etanol. O modelo obtido permitirá o desenvolv

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47

Plaks, Dmitriy Vital. "Dynamics of longitudinally forced bluff body flames with varying dilatation ratios." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31767.

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Thesis (M. S.)--Aerospace Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Tim Lieuwen; Committee Member: Jeff Jagoda; Committee Member: Suresh Menon. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Parkes, Anthony Richard. "The impact of size and location of pool fires on compartment fire behaviour." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2009. http://hdl.handle.net/10092/3444.

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An understanding of compartment fire behaviour is important for fire protection engineers. For design purposes, whether to use a prescriptive code or performance based design, life safety and property protection issues are required to be assessed. The use of design fires in computer modelling is the general method to determine fire safety. However these computer models are generally limited to the input of one design fire, with consideration of the complex interaction between fuel packages and the compartment environment being simplified. Of particular interest is the Heat Release Rate, HRR, a

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Egbert, Scott Cutler. "Pressurized Combustion Product Temperature Measurement Using Integrated Spectral Band Ratios." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7535.

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With increasing global power demands, there is a growing need for the clean and efficient use of fossil fuel resources. Gas turbine engines are a commonly used means for generating power; from the propulsion of aircraft to electricity on municipal grids. Measuring the temperature within a turbine combustor or at a turbine inlet could provide numerous advantages related to engine control, durability, efficiency, and emissions and yet this relatively straightforward task has eluded turbine engine manufacturers, primarily because of the high temperatures and pressures, harsh environment, and limi

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Kapadia, Bhavin Kanaiyalal. "Development Of A Single Cylinder SI Engine For 100% Biogas Operation." Thesis, Indian Institute of Science, 2006. https://etd.iisc.ac.in/handle/2005/283.

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This work concerns a systematic study of IC engine operation with 100% biogas as fuel (as opposed to the dual-fuel mode) with particular emphasis on operational issues and the quest for high efficiency strategies. As a first step, a commercially available 1.2 kW genset engine is modified for biogas operation. The conventional premixing of air and biogas is compared with a new manifold injection strategy. The effect of biogas composition on engine performance is also studied. Results from the genset engine study indicate a very low overall efficiency of the system. This is mainly due to the

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