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Tesis sobre el tema "Homogeneous combustion"

Autor: Grafiati

Publicado: 6 de septiembre de 2023

Última modificación: 25 de julio de 2025

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1

Das, Pranab. "Study of homogeneous combustion in compression ignition engines." Thesis, IIT Delhi, 2017. http://localhost:8080/iit/handle/2074/7216.

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2

Manoubi, Maha. "Combustion Characteristics for Non-homogeneous Segregated H2-Air Mixtures." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32272.

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The work presented in this thesis is an investigation of the dynamics of unconfined hydrogen-air flames in the presence of buoyant effects and the determination of an ignition criterion for flame propagation between adjacent pockets of reactive gas separated by air. The experimental work was conducted using the soap bubble technique and visualized with high speed schlieren or large scale shadowgraph systems. A study was first conducted to determine the most suitable soap solution additive among glycerol, guar and polyethylene oxide for conducting the experiments, isolating guar as the best c

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3

Kontarakis, George A. "Homogeneous charge compression ignition in four-stroke internal combustion engines." Thesis, University of Cambridge, 2001. https://www.repository.cam.ac.uk/handle/1810/272293.

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4

CCACYA, ANTHONY OSWALDO ROQUE. "EXPERIMENTAL STUDY OF HOMOGENEOUS MIXTURE COMPRESSION IGNITION IN INTERNAL COMBUSTION ENGINES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=17159@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Com o intuito de reduzir as emissões e melhorar a combustão em uma maior faixa de rotação e carga de um motor, foi proposto o estudo da combustão por compressão de misturas homogêneas (HCCI), este processo apresenta altas eficiências e baixas emissões, principalmente de NOx e fuligem. Assim, o objetivo do presente trabalho é a determinação das faixas de operação estável em um motor diesel, de alta taxa de compressão (20:1). O combustível utilizado foi gasolina tipo A, tendo em vista a sua grande produção, além das características

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5

Gidney, Jeremy. "The performance stability of a homogeneous charge lean-burn spark-ignition engine." Thesis, University of Liverpool, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303644.

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6

Castro, F. L. J. de. "A zero-dimensional model of turbulent combusition in homogeneous charge spark ignition engine." Thesis, Cranfield University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.352940.

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7

Luszcz, Pawel. "Combustion diagnostics in Homogeneous Charge Compression Ignition optical and thermal single cylinder engines." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/524/.

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The work presented in this thesis is intended to investigate the effects of fuel properties, injection strategy and timing on autoignition and combustion characteristics of a Homogeneous Charge Compression Ignition (HCCI) engine with a negative valve overlap (NVO) strategy. Conventional (pressure-transducer based) measurements and passive optical research have contributed to understanding of the chemical-physical sites of HCCI autoignition and combustion. This experimental work was undertaken on matching thermal and optical single cylinder research engines in configurations derived from a prod

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8

Alseda, Dorothée. "Contrôle de la combustion en mode HCCI (homogeneous charge compression ignition) par une formulation adaptée au carburant." Orléans, 2007. http://www.theses.fr/2007ORLE2033.

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Dans le contexte de la maîtrise des émissions de gaz à effet de serre et donc de la consommation des carburants, le moteur Diesel occupe une place privilégiée grâce à son meilleur rendement de combustion. Toutefois, les émissions de NOx et de particules sont un de ses handicaps. Pour limiter les émissions de ces polluants à l'échappement, les combustions basses températures comme la combustion HCCI (Homogeneous Charge Compression Ignition) représentent des alternatives prometteuses. La combustion HCCI est basée sur l'auto inflammation d'un mélange pauvre air/carburant dilué par de l'EGR. Les é

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9

Peucheret, Steven. "Exhaust gas reforming of natural gas to aid homogeneous charge compression ignition engine combustion." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420510.

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10

Zheng, Jincai Cernansky N. P. Miller David L. "A study of homogeneous ignition and combustion processes in CI, SI, and HCCI engine systems /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/557.

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11

Bhattacharya, Arunim. "Analysis of Homogeneous Charge Compression Ignition Engine with Emphasis on Combustion Timing and Reaction Rate." Thesis, Northern Illinois University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10639722.

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<p> HCCI engines are a class of engines which use high compression ratio to ignite a charge of air-fuel mixture, essentially eliminating the need for spark plugs. This contrasts with diesel engines (although HCCI can be used for diesel engines) where the fuel is injected near the top dead center of the compression stroke regime. Gasoline HCCI engines are of significance because, it attempts to improve the characteristics of the engine for example the thermal efficiency. High compression ratio comes with higher thermal efficiency, yet the peak temperature remains low enough to have low producti

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12

Wang, Wei. "Conditional Moment Closure Model for Ignition of Homogeneous Fuel/Air Mixtures in Internal Combustion Engines." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1577882100318004.

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13

Jewmaidang, Jirasak. "Homogeneous sulfur tri-oxide formation in gas reburning for nitrogen oxides control." Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175801641.

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14

Davidson, Jeffrey E. "Combustion Modeling of RDX, HMX and GAP with Detailed Kinetics." BYU ScholarsArchive, 1996. https://scholarsarchive.byu.edu/etd/6531.

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A one-dimensional, steady-state numerical model of the combustion of homogeneous solid propellant has been developed. The combustion processes is modeled in three regions: solid, two-phase (liquid and gas) and gas. Conservation of energy and mass equations are solved in the two-phase and gas regions and the eigenvalue of the system (the mass burning rate) is converged by matching the heat flux at the interface of these two regions. The chemical reactions of the system are modeled using a global kinetic mechanism in the two-phase region and an elementary kinetic mechanism in the gas region. The

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15

Saisirirat, Peerawat. "Etude de la combustion des mélanges hydrocarbures/alcools dans un moteur HCCI." Thesis, Orléans, 2011. http://www.theses.fr/2011ORLE2020.

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Actuellement, les principaux thèmes pour le secteur de transport sont le réchauffement global et la crise énergétique, ce qui encourage les chercheurs à développer des technologies alternatives et efficaces. Le concept ‘HCCI’ (combustion d’une charge homogène, allumée par compression) est l’une des solutions pour le moteur de véhicules. Ce mode de combustion, indépendant d’une notion de propagation de flamme, permet de réduire fortement les émissions critiques de NOX et de suies dans les gaz d'échappement. Cette combustion de type HCCI du carburant diesel se caractérise par une combustion à de

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16

Machrafi, Hatim. "Développement et validation expérimentale de schémas cinétiques pour des mélanges d'hydrocarbures pour une combustion HCCI : étude du processus d'auto-inflammation et application au moteur à combustion interne." Paris 6, 2007. http://www.theses.fr/2007PA066040.

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Une des solutions très prometteuses pour la réduction des émissions polluantes et de la consommation des moteurs à combustion interne est la mise en place de combustions alternatives pour une optimisation à la source. En particulier, de nombreuses études sont menées autour du développement d’une combustion en charge homogène par auto inflammation appelée « Homogeneous Charged Compression Ignition ». Cependant, le contrôle de ce mode de combustion nécessite une recherche avancée incluant une approche interdisciplinaire associant la chimie, la mécanique des fluides et les contraintes d’un foncti

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17

Ewald, Jens. "A level set based flamelet model for the prediction of combustion in homogeneous charge and direct injection spark ignition engines /." Göttingen : Cuvillier, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014901502&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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18

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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19

André, Mathieu. "Potentiel de la combustion HCCI et injection précoce." Phd thesis, Université d'Orléans, 2010. http://tel.archives-ouvertes.fr/tel-00597281.

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Depuis plusieurs années, l'une des problématiques sociétales est de diminuer les émissions de polluants et de gaz à effet de serre dans l'atmosphère. Le secteur du transport terrestre est directement concerné par ces considérations. Le moteur Diesel semble promis à un bel avenir grâce à son rendement supérieur à celui du moteur à allumage commandé, conduisant à de plus faibles rejets de CO2. Cependant, sa combustion génère des émissions d'oxyde d'azote (NOx) et de particules dans l'atmosphère. Les normes anti-pollution étant de plus en plus sévères et les incitations à diminuer les consommatio

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20

Ben, Houidi Moez. "Etude de l'influence des caractéristiques de carburants de synthèse sur la combustion diesel avancée homogène et partiellement homogène." Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2014. http://www.theses.fr/2014ESMA0013.

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Dans un contexte de recherche de nouveaux modes de combustion propres, la combustionhomogène à allumage par compression HCCI s’inscrit comme une stratégie prometteuse.Cependant, cette combustion est limitée par un niveau élevé de bruit. La recherche descarburants permettant de relaxer cette contrainte constitue l’objectif global de cette étude.Particulièrement, on s’intéresse ici à l’influence de l’Indice de Cétane, de la volatilité et de lacomposition chimique des carburants sur les Délais d’Auto-Inflammation et sur les vitesses decombustion globales évaluées par les taux maximaux d’accroisse

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21

Er-Raiy, Aimad. "Étude des processus élementaires impliqués en combustion à volume constant." Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2018. http://www.theses.fr/2018ESMA0019/document.

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La propagation de flammes turbulentes dans des milieux réactifs inhomogènes concerne un grand nombre d’applications pratiques, y compris celles qui reposent sur des cycles de combustion à volume constant. Les hétérogénéités de composition (richesse, température,dilution par des gaz brûlés, etc.) sont issues de plusieurs facteurs distincts tels que la dispersion du spray de gouttelettes de combustible et son évaporation, la topologie de l’écoulement ainsi que la présence éventuelle de gaz brûlés résiduels issus du cycle précédent. La structure des flammes partiellement prémélangées qui en résul

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22

Faddoul, Farhoud. "Cinetique chimique de la combustion d'un propergol homogene double-base avec et sans additif." Poitiers, 1988. http://www.theses.fr/1988POIT2322.

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Les reactions chimiques preponderantes dans differentes zones sont determinees et conduisent a la formation d'un schema global. La stoechiometrie et les parametres cinetiques sont determines et introduits dans la resolution des equations des quantites transportables dans la zone reactive. Ils conduisent a la determination numerique de la vitesse de combustion normale de ce type de propergol. Evaluation numerique de l'action des additifs de plomb sur la combustion du propergol, a differentes pressions

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23

Thein, Kévin Jean Lucien. "Evaluation of combustion concepts and scavenging configurations in a 2-Stroke compression-ignition engine for future automotive powerplants." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/164044.

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[ES] El trabajo de investigación presentado en esta tesis es el resultado de varios años dedicados al desarrollo, la implementación y la optimización de dos tecnologías combinadas: un concepto de combustión innovador y una arquitectura de motor de nuevo diseño. Esta investigacion se ha realizado en el marco de una colaboración con Renault SA, como continuación de las actividades realizadas en el proyecto europeo POWERFUL (POWERtrain for FUture Light-duty vehicles) por un lado,y en el marco del proyecto europeo REWARD (Real World Advanced technologies foR Diesel engines), devenido como continua

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24

Eslick, John. "A Dynamical Study of the Evolution of Pressure Waves Propagating through a Semi-Infinite Region of Homogeneous Gas Combustion Subject to a Time-Harmonic Signal at the Boundary." ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/1367.

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In this dissertation, the evolution of a pressure wave driven by a harmonic signal on the boundary during gas combustion is studied. The problem is modeled by a nonlinear, hyperbolic partial differential equation. Steady-state behavior is investigated using the perturbation method to ensure that enough time has passed for any transient effects to have dissipated. The zeroth, first and second-order perturbation solutions are obtained and their moduli are plotted against frequency. It is seen that the first and second-order corrections have unique maxima that shift to the right as the frequen

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25

Ibrahim, Mira. "Etude de la combustion de mélanges pauvres sur la base de biocarburant. Application par auto-allumage contrôlé par injection de particules de biomasse." Thesis, Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=http://theses-intra.upmc.fr/modules/resources/download/theses/2020SORUS088.pdf.

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La combinaison d'une technologie alternative comme l'allumage par compression de la charge (HCCI) avec une énergie renouvelable comme la biomasse est un bon compromis pour réduire les émissions polluantes à la source. L'un des problèmes majeurs de cette combustion est le contrôle du moment de l’allumage ; l'injection directe de particules solides en suspension dans le mélange réactif permet de contrôler le début de la combustion. Dans la première partie de ce travail, la combustion de la biomasse gazeuse a été étudiée expérimentalement sur une machine à compression rapide dans des conditions H

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26

Beauquel, Julien A. "Numerical investigation on the in-cylinder flow with SI and CAI valve timings." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/21548.

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The principle of controlled auto-ignition (CAI) is to mix fuel and air homogeneously before compressing the mixture to the point of auto-ignition. As ignition occurs simultaneously, CAI engines operate with lean mixtures preventing high cylinder pressures. CAI engines produce small amounts of nitrogen oxides (NOx) due to low combustion temperatures while maintaining high compression ratios and engine efficiencies. Due to simultaneous combustion and lean mixtures, CAI engines are restricted between low and mid load operations. Various strategies have been studied to improve the load limit of CA

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27

Fox, Clayton D. L. "Modeling Simplified Reaction Mechanisms using Continuous Thermodynamics for Hydrocarbon Fuels." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37554.

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Commercial fuels are mixtures with large numbers of components. Continuous thermodynamics is a technique for modelling fuel mixtures using a probability density function rather than dealing with each discreet component. The mean and standard deviation of the distribution are then used to model the chemical reactions of the mixture. This thesis develops the necessary theory to apply the technique of continuous thermodynamics to the oxidation reactions of hydrocarbon fuels. The theory is applied to three simplified models of hydrocarbon oxidation: a global one-step reaction, a two-step reaction

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28

Löbbert, Philipp. "Möglichkeiten und Grenzen der Teillaststeuerung von Ottomotoren mit vollvariablem Ventilhub." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1161694131099-10201.

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Im Rahmen dieser Arbeit werden die Potenziale zur Steigerung des Gesamtwirkungsgrads von stöchiometrisch homogen betriebenen Ottomotoren in der Teillast untersucht. Im Gegensatz zur konventionellen Laststeuerung über die Drosselklappe bezeichnet die betrachtete, drosselfreie Laststeuerung die Quantitätsregelung einzig über den Hubverlauf der Gaswechselventile. Nach einer Zusammenfassung bisheriger Untersuchungen zur drosselfreien Laststeuerung werden konkurrierende Bilanzierungsverfahren von Ladungswechsel- und Hochdruckteil von 4-Takt Verbrennungsverfahren vorgestellt. Anhand theoretischer Be

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29

Galmiche, Bénédicte. "Caractérisation expérimentale des flammes laminaires et turbulentes en expansion." Phd thesis, Université d'Orléans, 2014. http://tel.archives-ouvertes.fr/tel-01069403.

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Le moteur downsizé à allumage commandé constitue l'une des voies principales explorées par les constructeurs automobiles pour améliorer le rendement et réduire les émissions de dioxyde de carbone des motorisations essence. Il s'agit de combiner une réduction de la cylindrée avec une forte suralimentation afin d'améliorer le rendement du moteur, en particulier à faibles et moyennes charges. Leur mise au point est limitée par l'augmentation des combustions anormales, dont le contrôle par forte dilution peut également entraîner l'apparition de variabilités cycliques importantes. Actuellement, la

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30

Lin, Peng-Wu, and 林芃吾. "Numerical Analysis of Homogeneous Combustion Behaviors and Stratified Combustion Mode for Gasoline Direct Injection Engine." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/40308938997155180437.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>105<br>With the development of science and technology and the rise of environmental awareness, people request more and more on the engine performance and pollution emissions. Many scholars pointed out that the use of “gasoline direct injection technology" (Gasoline Direct Injection, GDI) will meet the demands of less fuel consumption, improve the thermal efficiency and reduce the pollution and so on. Therefore, this paper aims to analyze the fluid motion inside GDI engine by means of numerical simulation, making it possible to find out the way to improve the GDI en

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31

Li, Chih-Sheng, and 李智勝. "Effect of Intake on Combustion Characteristics of Homogeneous Charge Compression Ignition Engines." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/50270281963328521865.

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碩士<br>國立成功大學<br>系統及船舶機電工程學系碩博士班<br>94<br>The homogeneous charge compression ignition (HCCI) engine can enhance the thermal efficiency of DI engine and reduce the formulation of pollutant. Because the homogeneous charge compression ignition needs to adopt the formation of homogeneous mixture gas in the intake process, it is very important to analyzing the combustion performance of a homogeneous charge compression ignition engine with different intake premixed gas and its contents. This article is aimed at the KUBOTA RK-125 which is a single cylinder direct injection diesel engine, and carries o

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32

HONG-LIN-CHING and 洪嶙清. "Sensitivity Analysis of the Combustion timings of Homogeneous Charge Compression Ignition Engine." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/56379606017075508194.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>104<br>For the purpose of the optimal control development for a homogeneous charge compression ignition (HCCI) engine, sensitivity of the combustion timings is analyzed based on experiment data and a crank-angle-based model. The 500 c.c. single cylinder engine is equipped with an intake air heating system and an exhaust throttle. The physics-based model is first validated against the experiment data at various intake temperatures, air-to-fuel ratios (AFR) and residual gas fractions. The results show that the combustion timings are more sensitive to the in-cylinder te

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33

Herold, Randy E. "Optical investigations of the effects of stratification on homogeneous charge compression ignition combustion." 2008. http://www.library.wisc.edu/databases/connect/dissertations.html.

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34

Su, Che-Cheng, and 蘇哲正. "The Effects of Intake Manifold Gasoline Injection on the Homogeneous Characteristics of Diesel Engine Combustion." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/82505830850345592903.

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碩士<br>國立雲林科技大學<br>機械工程系碩士班<br>91<br>This research is done against the YAMAHA ME200F three cylinders direct injection diesel engine. The engine exhaust emissions, the cylinder pressure, and the heat releases characteristics are measured and analyzed to study the effects of gasoline injection in the intake manifold on the engine combustion generosity. The best fuel injection angle and the optimized 92 CPC gasoline injected rate are studied under balanced and unbalanced total fuel energy consumed in the diesel engine in order to understand this relatively homogeneous combustion phenomena. The

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35

Marriott, Craig David. "An experimental investigation of direct injection for homogeneous and fuel-stratified charge compression ignited combustion timing control." 2001. http://catalog.hathitrust.org/api/volumes/oclc/47207299.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 2001.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 208-211).

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36

WANG, HAN-YING, and 王漢英. "Combustion Characteristics Investigation and Thermal Efficiency Improvement of a Small Engine Operated with Homogeneous Charge Compression Ignition." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/c7k243.

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博士<br>國立臺北科技大學<br>機電學院機電科技博士班<br>107<br>The efficiency of an internal combustion engine is essential for automobiles and motorcycles. Several studies have demonstrated that homogeneous charge compression ignition is a promising technology for realizing high engine efficiency and low emissions. This study investigated the combustion characteristics of HCCI using a motorcycle engine with various fuels including kerosene, n-heptane, and dimethyl ether (DME) which has lower autoignition temperature and higher cetane number. The engine performance, combustion characteristics, and thermal efficiency

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37

Shields, Bradley J. "Single-Phase Turbulent Enthalpy Transport." 2014. https://scholarworks.umass.edu/masters_theses_2/113.

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Vapor generation is central to the flow dynamics within fuel injector nozzles. Because the degree of atomization affects engine emissions and spray characteristics, quantification of phase change within diesel fuel injectors is a topic of design interest. Within the nozzle, the large pressure gradient between the upstream and downstream plena induce large velocities, creating separation and further pressure drop at the inlet corner. When local pressure in the throat drops below the fluid vapor pressure, phase change can occur with sufficient time. At the elevated temperatures present in diesel

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38

Pandey, Sunil Kumar. "Exploration And Assessment of HCCI Strategies for a Multi-Cylinder Heavy-Duty Diesel Engine." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/2720.

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Homogeneous Charge Compression Ignition (HCCI) combustion is an alternative combustion mode in which the fuel is homogeneously mixed with air and is auto-ignited by compression. Due to charge homogeneity, this mode is characterized by low equivalence ratios and temperatures giving simultaneously low nitric oxide (NOx) and soot in diesel engines. The conventional problem of NOx-soot trade-off is avoided in this mode due to absence of diffusion combustion. This mode can be employed at part load conditions while maintaining conventional combustion at high load thus minimizing regulatory cycle emi

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39

Pandey, Sunil Kumar. "Exploration And Assessment of HCCI Strategies for a Multi-Cylinder Heavy-Duty Diesel Engine." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2720.

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Homogeneous Charge Compression Ignition (HCCI) combustion is an alternative combustion mode in which the fuel is homogeneously mixed with air and is auto-ignited by compression. Due to charge homogeneity, this mode is characterized by low equivalence ratios and temperatures giving simultaneously low nitric oxide (NOx) and soot in diesel engines. The conventional problem of NOx-soot trade-off is avoided in this mode due to absence of diffusion combustion. This mode can be employed at part load conditions while maintaining conventional combustion at high load thus minimizing regulatory cycle emi

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