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Tesis sobre el tema "Hydrogen injection"

Autor: Grafiati
Publicado: 10 de marzo de 2023
Última modificación: 31 de agosto de 2024

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1

Young, Jacob. "Hydrogen injection into diesel engines for fuel efficiency improvement." Thesis, Young, Jacob (2008) Hydrogen injection into diesel engines for fuel efficiency improvement. Masters by Coursework thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/2079/.

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The purpose of this investigation was to determine whether hydrogen injected into a diesel internal combustion engine has the potential to reduce overall fuel consumption. The most economical means of performing the required tasks was used whenever possible in an attempt to mimic a small off-grid application. The genset was a small 4kW compression ignition diesel. The electrolyzer was an off-the-shelf model designed for automotive applications. It combines hydrogen and oxygen output and is currently found from many manufacturers over the internet. It was found that the H2/02 mixture actually d
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2

Wagner, Timothy Charles. "Ignition and flameholding in supersonic flow by injection of dissociated hydrogen." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/49905.

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The objective of this research was to investigate analytically and experimentally the use of free radicals for ignition and flameholding in supersonic flows. An analytical investigation of the effects of adding small quantities of radicals to a stoichiometric mixture of hydrogen and air was performed using a finite-rate chemical kinetics code. The results of these calculations indicate that small additions of hydrogen atoms, oxygen atoms, nitrogen atoms, or hydroxyl radicals are effective in promoting ignition. These analytical results were qualitatively verified in a Mach 2 flow experiment us
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3

Cuesta, Daniel F. "Effects of hydrogen and ethylene injection schemes in a supersonic airstream." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0002725.

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4

Milne, Angela. "Marine biogeochemistry studies of iron and hydrogen peroxide using flow injection-chemiluminescence." Thesis, University of Plymouth, 2007. http://hdl.handle.net/10026.1/2007.

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Iron is an essential micronutrient for the growth of planktonic species. It is an integral element of numerous enzymes and proteins with important functions in photosynthesis and respiratory electron transport. In contrast to iron, hydrogen peroxide (H202) is ubiquitous in seawater. Phytoplankton are known to generate reactive oxygen species (ROS) such as superoxide and H202 . This production, in conjunction with membrane bound reductases, may affect an organism's ability to access nutrients such as iron. The work presented in this thesis describes the development and optimisation of sensitive
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5

Mohammad, Ahmad A. A. "Experimental investigation of in situ upgrading of heavy oil by using a hydrogen donor and catalyst during steam injection." Texas A&M University, 2008. http://hdl.handle.net/1969.1/86051.

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Experiments were conducted to investigate the feasibility of in situ upgrading of heavy oil by the use of an orgametallic catalyst and a hydrogen donor (tetralin). The experiments used a vertical injection cell into which a mixture of sand, water, and Jobo oil was thoroughly mixed and packed. Two types of runs were conducted: a run where the tetralin and catalyst were mixed within the mixture before packing into the cell, and the other was conducted by injecting a slug of the tetralin-catalyst solution before commencing with the steam injection. The Jobo oil used had an oil gravity of 12.4° AP
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6

Shigeta, Takanobu. "Luminal injection of hydrogen-rich solution attenuates intestinal ischemia-reperfusion injury in rats." Kyoto University, 2015. http://hdl.handle.net/2433/199174.

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7

Verreault, Jimmy. "Design of a Shock-Induced Combustion Experiment in an Axisymmetric Configuration with Hydrogen Injection." Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/24967/24967.pdf.

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8

Price, David. "The determination of hydrogen peroxide in sea water using flow injection with chemiluminescence detection." Thesis, University of Plymouth, 1995. http://hdl.handle.net/10026.1/1735.

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This thesis describes the design, assembly and optimisation of a flow injection-chemiluminescence (FI-CL) procedure for the determination of hydrogen peroxide (H2O2) in seawater. An overview of the biogeochemical importance of H2O2 in seawater is presented in Chapter One. The use of both flow injection and chemiluminescence based methods are also reviewed. Chapter Two describes the type of analytical instrumentation used in both flow injection and chemiluminescence methods. Each component is described and its suitability to the FI-CL method discussed. Two detection systems; photomultiplier tub
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9

Homitz, Joseph. "A Lean-Premixed Hydrogen Injector with Vane Driven Swirl for Application in Gas Turbines." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/36334.

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Hydrogen, as an alternative to conventional aviation fuels, has the potential to increase the efficiency of a gas turbine as well as reduce emissions of greenhouse gases. In addition to significantly reducing the number of pollutants due to the absence of carbon, burning hydrogen at low equivalence ratios can significantly reduce emissions of oxides of nitrogen (NOx). Because hydrogen has a wide range of flammability limits, fuel lean combustion can take place at lower equivalence ratios than those with typical hydrocarbon fuels. <p> Numerous efforts have been made to develop gas turbine fu
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10

Calisesi, Federico. "The analysis of the injection of hydrogen-oxygen mixtures in gasoline-powered internal combustion engines." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15553/.

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The effects on combustion derived by the blending of hydrogen with traditional fuels adopted for internal combustion engines have been studied. Results derived by emission tests of a gasoline-fed vehicle equipped with a system for the production of hydrogen on-board have been analysed. The energy balance for the engine was evaluated. It demonstrated the increase of fuel consumptions to perform electrolysis process on-board the vehicle. Afterwards, numerical simulations based on a detailed kinetic model have been performed to calculate pollutant emissions produced by methane and iso-octane (whi
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11

Rüscher, Claus H., Lars Schomborg, and Josef-Christian Buhl. "Thermally controlled water injection into BH 4 -sodalite for hydrogen formation investigated by IR absorption." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186744.

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12

Rüscher, Claus H., Lars Schomborg, and Josef-Christian Buhl. "Thermally controlled water injection into BH 4 -sodalite for hydrogen formation investigated by IR absorption." Diffusion fundamentals 12 (2010) 37, 2010. https://ul.qucosa.de/id/qucosa%3A13881.

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13

Gerke, Udo. "Numerical analysis of mixture formation and combustion in a hydrogen direct injection internal combustion engine." Göttingen Cuvillier, 2007. http://d-nb.info/987455966/04.

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14

Brazzale, Pietro. "Numerical and experimental study at the pilot scale of the hydrogen injection into liquid sodium by permeation through nickel membrane." Thesis, Toulouse, INPT, 2020. http://www.theses.fr/2020INPT0101.

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Dans le cadre des Réacteurs à Neutrons Rapides refroidis à Sodium (RNR-Na), le contrôle de la contamination du tritium dans les circuits sodium et la maitrise de sa diffusion dans l’atmosphère est fondamentale. Afin de piéger et récupérer le tritium, il est nécessaire de maintenir une quantité minimale d’hydrogène dissous dans le sodium liquide. L’injection d’hydrogène par perméation à travers une membrane dense de nickel a été proposée afin de fournir un apport d’hydrogène continu au flux de sodium liquide et obtenir la concentration en hydrogène souhaitée. Des membranes de nickel similaires
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15

Evans, John P. "Experimental Evaluation of the Effect of Inlet Gas Humidification on Fuel Cell Performance." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9597.

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The development and evaluation of a fuel cell test stand incorporating various methods for controlling the temperature and humidity of fuel cell reactants is described. The test stand is capable of accurately metering gas flows, controlling the temperature and humidity of the gases, and delivering the gases to the fuel cell in a safe manner. Additionally, the test stand can measure the voltage and current produced by the fuel cell during operation. Two test stands were constructed and evaluated, one using steam injection for fuel cell stacks and the other using flash evaporation for individual
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16

Rothstein, Andrew D. (Andrew David). "A study of the normal injection of hydrogen into a heated supersonic flow using planar laser-induced fluoresence." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/43249.

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17

Bonanos, Aristides Michael. "Scramjet Operability Range Studies of an Integrated Aerodynamic-Ramp-Injector/Plasma-Torch Igniter with Hydrogen and Hydrocarbon Fuels." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28847.

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An integrated aerodynamic-ramp-injector/plasma-torch-igniter of original design was tested in a Mâ = 2, unvitiated, heated flow facility arranged as a diverging duct scramjet combustor. The facility operated at a total temperature of 1000 K and total pressure of 330 kPa. Hydrogen (H2), ethylene (C2H4) and methane (CH4) were used as fuels, and a wide range of global equivalence ratios were tested. The main data obtained were wall static pressure measurements, and the presence of combustion was determined based on the pressure rises obtained. Supersonic and dual-mode combustion were achieved
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18

Feleke, Abisake. "Determination of Cholesterol in Foods by Flow Injection Analysis with Perroxyoxalate Chemiluminescence." Digital Commons @ East Tennessee State University, 2006. https://dc.etsu.edu/etd/2231.

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Cholesterol is an important biological molecule with many important functions. However, high serum cholesterol is a health hazard. Thus analysis of cholesterol is important and many analytical techniques have been developed. The objectives of the proposed research are to develop an economical, rapid method for the determination of total cholesterol with good selectivity and enhanced sensitivity. For evaluation of proposed flow injection analysis with peroxyoxalate chemiluminescence (FIA-POCL) method, figures of merit such as accuracy, precision, and linear dynamic range will be assessed. The p
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19

Kroniger, Daniel [Verfasser], Manfred Christian [Akademischer Betreuer] Wirsum, and Thomas [Akademischer Betreuer] Sattelmayer. "Prediction of NO$_\textrmx}$ emissions for a hydrogen fueled industrial gas turbine combustor with water injection / Daniel Kroniger ; Manfred Christian Wirsum, Thomas Sattelmayer." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1192308662/34.

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20

Duncan, Corey Scott. "Techno-economical modeling of a PtG plant for operational optimization in the context of gas grid injection in France." Thesis, KTH, Kemiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-288978.

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Klimatförändringar är den enskilt största utmaningen som mänskligheten står inför under 2000-talet. För att ta itu med denna utmaning förutses förnybara energikällor en stor ökning av andelen primärenergi globalt. Den naturliga variabiliteten hos sol och vind kräver att energilagring används tillsammans med dem för en energisystemövergång. Power-to-Gas (PtG) -teknologier erbjuder en attraktiv lösning genom att möjliggöra omvandling av elektrisk energi till vätgas eller metan, vilket möjliggör integration över nätverk och sektorövergripande integration. Denna avhandling undersöker lönsamheten f
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21

GOEL, PRASHANT. "Numerical modelling and analysis of combustion in DI and PFI CNG engines - A study under different EGR dilution and Hydrogen doping conditions." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2945175.

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22

Boukarkour, Youness. "Étude de systèmes électro-catalytiques pour l’amélioration des performances de véhicules à moteurs thermiques." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0081.

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Aujourd’hui, la recherche de solutions énergétiques durables est devenue une préoccupation essentielle due à la crise environnementale que nous vivons, le secteur des transports étant parmi les domaines les plus polluants en raison de l’utilisation des moteurs à combustion interne (MCI). Bien que la transition vers des moteurs électriques est en cours, elle prendra du temps, car ces équipements ne seront pas accessibles à tous et présentent également leurs propres inconvénients. Les MCI vont donc rester d’actualité pendant longtemps malgré les politiques environnementales en cours. Logikko, l’
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23

Zhang, Wei. "Development of Photochemically Initiated Direct and Indirect Luminescence Detection Methods for Liquid Chromatography (LC) and Study of Aromatic Sulfonates and Phospholipids Using Reversed Phase Ion-Pair LC-Mass Spectrometry." Miami University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=miami1068739487.

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24

MUSCOLINO, Emanuela. "Polysaccharide hydrogels for regenerative medicine applications." Doctoral thesis, Università degli Studi di Palermo, 2022. http://hdl.handle.net/10447/535885.

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25

Sykes, David Michael. "Design and Evaluation of a Lean-Premixed Hydrogen Injector with Tangential Entry in a Sector Combustor." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/31722.

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Hydrogen use in a gas turbine engine has many benefits. Chief among these is the elimination of carbon based emissions. The only products and emissions from the combustion process are water vapor and oxides of nitrogen (NOx). However due to the lower flammability limit of hydrogen, it can be burned at much lower equivalence ratios that typical hydrocarbon fuels, and thus reducing the emissions of NOx. Multiple efforts have been made for the design of premixing injectors for gaseous hydrocarbon fuels, but very few attempts have been made for hydrogen. <p> To this end a premixing hydrogen in
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26

Wang, Hua. "COMPUTATIONAL INVESTIGATION OF TRANSMURAL DIFFERENCES IN LEFT VENTRICULAR CONTRACTILITY AND HYDROGEL INJECTION TREATMENT FOR MYOCARDIAL INFARCTION." UKnowledge, 2017. http://uknowledge.uky.edu/me_etds/92.

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Heart failure (HF) is one of the leading causes of death and impacts millions of people throughout the world. Recently, injectable hydrogels have been developed as a potential new therapy to treat myocardium infarction (MI). This dissertation is focused on two main topics: 1) to gain a better understanding the transmural contractility in the healthy left ventricle (LV) wall and 2) investigate the efficacy of the hydrogel injection treatment on LV wall stress and function. The results indicate that a non-uniform distribution of myocardial contractility in the LV wall provide a better representa
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27

Pitorre, Marion. "Développement de deux plateformes pharmaceutiques gélifiées : un hydrogel de nanocapsules lipidiques et un organogel avec le même agent de réticulation." Thesis, Angers, 2017. http://www.theses.fr/2017ANGE0074/document.

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Une nouvelle plateforme hydrogel uniquement formée par l’association de nanocapsules lipidiques (NCLs) a été développée en s’inspirant de précédents travaux utilisant une gemcitabine modifiée. Afin de limiter la toxicité de l’hydrogel, la gemcitabine a été remplacée par la cytidine, rendue amphiphile par une chaîne aliphatique (Cyt-C16). Placée à l’interface huile/eau des NCLs, la Cyt-C16 permet la formation d’un réseau tridimensionnel de NCLs à l’origine de la gélification. Un plan de mélange a permis d’optimiser les procédés de formulation de 4 tailles de NCLs modèles. Les propriétés viscoél
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28

Urbahn, John A. (John Arthur). "The design and performance of a twenty barrel hydrogen pellet injector for Alcator C-Mod." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11627.

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29

Mochalskyy, Serhiy. "Modeling of the negative ion extraction from a hydrogen plasma source : application to ITER neutral beam injector." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00672140.

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The development of the negative ion source constitutes a crucial step in the construction of the neutral beam injector of ITER. To fulfil the ITER requirements in terms of heating and current drive, the negative ion source should deliver 40 A of D-. The achievement of such a source is challenging from technical and scientific points, and it requires a deeper understanding of the underlying physics. The present knowledge of the ion extraction mechanism from the negative ion source is limited due to the complexity of the problem that involves the comprehension of the behaviour of magnetized plas
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30

Wang, Hua. "Computational Investigation of Injectable Treatment Strategies for Myocardial Infarction." UKnowledge, 2014. http://uknowledge.uky.edu/me_etds/33.

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Heart failure is an important medical disease and impacts millions of people throughout the world. In order to treat this problem, biomaterial injectable treatment injected into the myocardium of the failing LV are currently being developed. Through this treatment, the biomaterial material injections can reduce wall stresses during the cardiac remodeling process. By using computational techniques to analyze the effects of a treatment involving the injection of biomaterial material into the LV after MI, the material parameters of the hydrogel injections can be optimized. The results shows that
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31

Overend, Elizabeth. "Structural design and CFD modelling of a new type of hydrogen fuel injector for internal combustion engine applications." Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/12743.

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A new type of fuel injector, incorporating a steel, annular diaphragm as the open/close device has been designed. This design would avoid sliding contact between components and exhibit low wear when metering hydrogen fuel. Further, it has been shown by simulation that the injector can a designed to withstand cyclic stresses and deliver hydrogen fuel at a rate suitable for direct injection to the cylinder of an IC engine. Investigation of the possibility of incorporating a pump in the injector unit to provide elevated pressure shows that a minimum of 3.4% of the fuel energy supplied would be re
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32

CARFAGNA, GIUSEPPE. "Integrated energy interchange platform between green system of smart housing and smart mobility." Doctoral thesis, Università degli Studi di Camerino, 2018. http://hdl.handle.net/11581/408083.

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In recent years, the need for personal urban mobility has increased a lot especially in emerging and developing countries. It becomes increasingly important to explore propulsion systems that use alternative energy sources and are related to the chain of production, storage and use of renewable energy. Several studies have been conducted in this area, but very few have achieved solutions for the interaction of the vehicle with the building by which it is parked in terms of a multi-energy exchange. Technological innovation of house plant parts, of large residences / hotels, of shelter stations
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33

Sacadura, Jean-Christian. "Etude expérimentale des flammes non-prémélangées hydrogène-oxygène. Caractérisation des champs dynamiques et scalaires." Rouen, 1997. http://www.theses.fr/1997ROUES045.

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Les flammes non-prémélangées hydrogène-oxygène stabilisées sur des injecteurs de type coaxial ont été étudiées. La technique de vélocimétrie Doppler laser a été utilisée pour caractériser les champs dynamiques. La tomographie laser a permis de visualiser la structure interne du jet d'oxygène. Les mesures des composantes de vitesse et des fluctuations associées réalisées sur trois injecteurs différents ont révélé l'existence de trois zones principales dans les flammes non-prémélangées hydrogène-oxygène : -la zone du jet d'oxygène -la zone de réaction -la zone d'expansion les effets de la tempér
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34

Colin, Pascal. "Analyse statistique d'images de fluorescence dans des jets diphasiques." Rouen, 1998. http://www.theses.fr/1998ROUES069.

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La nature quantitative, en terme de concentration locale, de la fluorescence induite par laser a permis de réaliser des études statistiques des images dans la zone de développement proche de l'injecteur de jets diphasiques coaxiaux avec ou sans combustion. Quand elle est superieure a trois diamètres d'injection, la longueur du dard liquide est gouvernée par le rapport des pressions dynamiques entre le gaz et le liquide injectes. Cependant l'étude de l'aire interfaciale du dard et l'examen des champs de vitesse instantanés du liquide montrent l'existence d'un régime avec troncature du dard. La
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35

Vandevraye, Mickael. "Microscopie et spectroscopie de photodétachement; mesure de la section efficace de photodétachement de H- à 1064 nm par observation du comportement asymptotique du régime saturé." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00932446.

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Dans cette thèse, nous initions la démonstration, à échelle réduite, de la faisabilité du photodétachement presque total, par laser, d'un jet d'ions négatifs d'hydrogène en cavité optique Fabry-Perot pour les futurs injecteurs de neutres destinés au chauffage des plasmas des réacteurs de fusion nucléaire.Nous élaborons une nouvelle méthode de mesure d'une section efficace de photodétachement, dont la connaissance à la longueur d'onde d'excitation est requise pour le dimensionnement de la cavité Fabry-Perot, basée sur l'observation de la saturation en régime d'éclairement impulsionnel. Le calcu
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36

Foster, Matthew. "Design of a hydrogen injection system for a prechamber hydrogen-fueled internal combustion engine." 2009. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=958055&T=F.

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37

Hsieh, Ming-Fong, and 謝明峰. "Experimental study of hydrogen direct injection spark ignition engine." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/61958709169998335777.

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碩士<br>逢甲大學<br>機械工程學所<br>97<br>This study chooses the hydrogen direct injection on the performance of the hydrogen engine to explore. The experiment engine adopts single cylinder and four strokes which converts gasoline fuel into hydrogen fuel. Moreover , modified on the engine, installed fuel injection systems,control systems, air intake system and power measuring device. Experimental results show that fuel injection timing in the intake stroke (270-300ObTDC) can successfully start the hydrogen engine, WOT status and hydrogen injection pressure 60bar amount maximum speed 2200rpm.That is disa
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38

謝宗燁. "Study of Combustion Effects for Hydrogen Injection in Scramjet Engine Combustor." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/89420493458057462392.

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碩士<br>逢甲大學<br>航太與系統工程學系<br>103<br>This study describes using the finite volume method to solve Reynold average Navier-Stokes Equations, in order to simulates the flow field of external intake compression ramp to the internal combustion chamber on a supersonic combustion ramjet engine(Scramjet Engine). And this thesis uses non-premixed combustion model to simulate the combustion reaction process of supersonic combustion. The operation theory of supersonic combustion ramjet engine is that in hypersonic flight conditions, air compressed by shock waves pass into the combustion chamber and prod
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39

Ya-ChuChang and 張雅筑. "Observation of Supersonic Airflow over Backward-Facing Step with Hydrogen Injection." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/75686649409884651716.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>101<br>The efficient injection, mixing and combustion process inside the combustor have been the key elements of supersonic combustion ramjet (scramjet). This study is focused on how the backward-facing step model affects the mixing efficiency of free-stream and hydrogen jet in supersonic flow and the self-ignition process. The study used the reflected shock tunnel re-equipped to double-diaphragm operation to replicate the scramjet combustor environment while the flight speed reaches Mach 6. The high enthalpy flow is provided by the impulse facility and by means
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40

Huang-JhihZhuang and 莊閎智. "Evaluation on Liquid Fueled with Hydrogen Injection Micro Turbine Engine Performance." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/13044034996328154947.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>101<br>The purpose of this research is to inject hydrogen into a turbine engine which consumes liquid fuel (JP-8) as major fuel. The turbine engine is composed with a turbocharger (TD-08) and a combustor which is designed in laboratory. In all stations there are 5 thermocouples and 4 pressure sensors installed. The exhaust extractor combines with gas analyzer which is installed outside the turbine exit. Amount of hydrogen (7.67L/min~71.8L/min)less than 6% based on total heat of fuel are injected into the combustor in order to examinate the influence of combustio
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41

Lin, Lu-Hung, and 林律宏. "A study of heat transfer models in the direct injection hydrogen engine." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/48w579.

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碩士<br>中原大學<br>機械工程研究所<br>102<br>In consideration of petroleum shortage and global warming is getting worse. Therefore, countries of the world dedicated to develop alternative fuels which applying to internal combustion engine, in order to reduce consumption of fossil fuel and emission of greenhouse gas. Hydrogen fuel has been assessed to a well potential solution on internal combustion engine all over the world. Furthermore, as hydrogen fuel is depleted, it is almost zero pollution and has higher thermal efficiency than petrol, diesel and natural gas in internal combustion engine. In this s
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42

Liou, Wei-Zan, and 劉威瓚. "Analysis of the Performance in Injection Engine with Hydrogen and Gasoline Fuels." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/16624059196044118717.

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碩士<br>中原大學<br>機械工程研究所<br>103<br>Abnormal climate changes have been noticed increasingly because of various catastrophic phenomena attributable to the intensive use of fossil fuels. Abnormal climate changes have led to the occurrence of numerous unanticipated catastrophes, which severely influence the economy and threaten people’s lives and properties. To address global warming and the greenhouse effect, this study proposes using hydrogen fuel as an alternative to fossil fuels, which can serve as an ecofriendly energy source to protect the earth’s resources and render the earth a sustainable li
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43

Belanger, Jacques. "Studies of mixing and combustion in hypervelocity flows with hot hydrogen injection." Thesis, 1993. https://thesis.library.caltech.edu/3197/1/Belanger_jj_1993.pdf.

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<p>The ability to build an air-breathing single-stage-to-orbit propulsion system requires examination of key elements such as turbulent mixing rates, especially at the "zero shear" fuel-air mixing condition, and combustion efficiency. The required data can only be obtained in experiments which simultaneously match the flight total pressure and total enthalpy as well as the fuel conditions. GALCIT, with its new free piston shock tunnel T5, has the capability to do some of these combustion experiments. But prior to these tests, it was felt that there was a need to simulate the gas dynamical proc
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44

Adolfo, Dominique. "Modelling and simulation of natural gas distribution networks in the presence of hydrogen injection." Doctoral thesis, 2020. http://hdl.handle.net/2158/1213924.

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The 2050 long-term strategy, defined by the European Commission, leads towards zero greenhouse gas emissions by 2050. Reduction of carbon dioxide emissions can be achieved substituting high carbon fossil fuels (coal and oil) with natural gas, renewable sources and green fuels. In the next years, the gas system will play a central and crucial role in the global energy market. Due to modifications of international gas trade flows and rise of demand, the existing gas infrastructures will necessarily have to be expanded, upgraded and renovated in the immediate future. Furthermore, power-to-gas tec
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45

Geh, Martin. "Development of analytical & optimization tools for double-acting hydrogen direct injection technology." Thesis, 2008. http://hdl.handle.net/1828/2495.

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One of the market leaders in hydrogen injection systems for internal combustion engines has developed double acting direct injection technology for a wide range of fuel pressures. This thesis outlines the development and validation of a solenoid model which predicts static magnetic forces as well as the development of a dynamic lift model which predicts injector motion and impact forces. The solenoid force model found that iron cobalt can be replaced by iron silicon materials as there performance is comparable. The dynamic lift model shows that the seat and stop impact forces can be calculated
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46

Chen, Jyun-Lin, and 陳鈞琳. "The Study on Using Mixed Hydrogen Fuel in Multi-point Injection SI Engine." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/01425756279638191457.

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碩士<br>大葉大學<br>車輛工程學系碩士班<br>95<br>Due to the impending depletion of fossil fuels on earth, new and alternative energy sources are important issues both for industry and household. Among the frequently addressed alternative fuel, hydrogen energy definitely deserves the most attentions. There are two problems to overcome before it can be commercially accepted：1.high cost in the production of hydrogen, 2.safety and reliability in the storage and transportation of hydrogen. Hydrogen is a secondary energy fuel. It can not be obtained directly from the planet. The industrial production of hydrogen is
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47

Biju, Kumar K. S. "Role Of Hydrogen Injection Temperature On The Combustion Instability Of Cryogenic Rocket Engine." Thesis, 2012. http://etd.iisc.ac.in/handle/2005/2297.

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Physical mechanism for high frequency instability in cryogenic engines at low hydrogen injection temperature has been a subject of debate for long time. Experimental and early developmental studies revealed no instabilities and it was only much later when liquid hydrogen at lower initial temperature (~50 to 100 K) was injected into the combustion chamber that instabilities were detected. From the compilations of the experimental data related to the instability of cryogenic engines by Hulka and Hutt, it was found that the instability was strongly connected to the temperature of hydrogen. Experi
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48

Biju, Kumar K. S. "Role Of Hydrogen Injection Temperature On The Combustion Instability Of Cryogenic Rocket Engine." Thesis, 2012. http://etd.iisc.ernet.in/handle/2005/2297.

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Physical mechanism for high frequency instability in cryogenic engines at low hydrogen injection temperature has been a subject of debate for long time. Experimental and early developmental studies revealed no instabilities and it was only much later when liquid hydrogen at lower initial temperature (~50 to 100 K) was injected into the combustion chamber that instabilities were detected. From the compilations of the experimental data related to the instability of cryogenic engines by Hulka and Hutt, it was found that the instability was strongly connected to the temperature of hydrogen. Experi
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49

"Design of a Shock-Induced Combustion Experiment in an Axisymmetric Configuration with Hydrogen Injection." Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/24967/24967.pdf.

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50

Trusca, Bogdan. "High pressure direct injection of natural gas and hydrogen fuel in a diesel engine." Thesis, 2001. http://hdl.handle.net/2429/11481.

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Emissions and performance of an HPDI single-cylinder diesel engine fueled by natural gas and by a mixture of hydrogen-natural were investigated. A DDC 1-71 engine with electronic controls was used. Natural gas or hydrogen-natural gas mixture was injected late in the compression stroke after a pilot quantity of a diesel was injected. Engine performance and emissions have been measured over a wide range of parameters: gas injection pressure, engine load, injection delay and mass flow percentages for the gaseous fuels. These results were compared with conventional diesel fueling. The purpose of
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