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Dissertations / Theses on the topic 'High pressure spray'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Demosthenous, Alexis. "Soot formation and oxidation in a high-pressure spray flame." Thesis, Queen Mary, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424461.

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2

Mühlbauer, Monika. "Modelling wall interactions of a high-pressure, hollow cone spray /." Aachen : Shaker, 2009. http://d-nb.info/998456616/04.

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3

McGlashan, Niall Ross. "Design and testing of a high pressure chamber for diesel spray studies." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/7174.

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4

Mühlbauer, Monika [Verfasser]. "Modelling wall interactions of a high-pressure, hollow cone spray / Monika Mühlbauer." Aachen : Shaker, 2009. http://d-nb.info/1161302034/34.

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5

Ramasubramanian, Chandrasekar. "Characterization of Near Field Spray for Impinging Doublets in Air Under High Pressure." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1397233377.

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6

Choi, Yong Seok. "Diesel spray characterisation in a high pressure chamber and in a single-cylinder engine." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393885.

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7

Accardo, Mario G. "Effects of high pressure water jet on aluminum surfaces prior to thermal spray coating." Master's thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-10222009-124845/.

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8

Peraza, Ávila Jesús Enrique. "Experimental study of the diesel spray behavior during the jet-wall interaction at high pressure and high temperature conditions." Doctoral thesis, Universitat Politècnica de València, 2020. http://hdl.handle.net/10251/149389.

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[EN] The potential of diesel engines in terms of robustness, efficiency and energy density has made them widely used as power generators and propulsion systems. Specifically, fuel atomization, vaporization and air-fuel mixing, have a fundamental effect on the combustion process, and consequently, a direct impact on pollutant formation, fuel consumption and noise emission. Since the combustion chamber has a limited space respect to the spray penetration, wall impingement is considered to be a common event in direct injection diesel engines, having a relevant influence in the spray evolution and

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9

Emre, Oguz. "Modeling of spray polydispersion with two-way turbulent interactions for high pressure direct injection in engines." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2014. http://www.theses.fr/2014ECAP0029/document.

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La simulation des écoulements diphasiques rencontrés dans les moteurs à combustion interne (MCI) est de grande importance pour la prédiction de la performance des moteurs et des émissions polluantes. L’injection directe du carburant liquide à l’intérieur de la chambre de combustion génère loin de l’injecteur un brouillard de gouttes polydisperses, communément appelé spray. Du point de vue de la modélisation, l’émergence des méthodes Eulériennes pour la description du spray est considérée prometteuse par la communauté scientifique. De plus, la prise en compte de la distribution en taille des go

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10

Domingo-Alvarez, Patricia. "High-pressure combustion large-eddy simulation for an a priori optical diagnostics validation." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMIR26.

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Afin de réduire la consommation spécifique et les émissions de CO₂ des moteurs aéronautiques, les industriels cherchent à augmenter la pression maximale dans le cycle thermodynamique de Brayton. Cette augmentation de pression entraîne un fort impact sur la structure de la flamme (épaisseur, vitesse, cinétique chimique) mais également sur les émissions de polluants, tels que les NOx. Les émissions de NOx peuvent être limitées en adoptant des technologies innovantes comme les chambres de combustion low-NOx. De même, la haute pression dans la chambre impacte également les propriétés radiatives de

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11

Aye, Maung Maung [Verfasser]. "Spray Combustion of Single- and Multi-component Fuels under Engine-like Conditions in a High Pressure Chamber / Maung Maung Aye." Aachen : Shaker, 2015. http://d-nb.info/1070152005/34.

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12

Nilaphai, Ob. "Vaporization and Combustion Processes of Alcohols and Acetone-Butanol-Ethanol (ABE) blended in n-Dodecane for High Pressure-High Temperature Conditions : Application to Compression Ignition Engine." Thesis, Orléans, 2018. http://www.theses.fr/2018ORLE2020/document.

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La préoccupation de plus en plus importante ces dernières décennies, liée à l’épuisement des ressources pétrolières et au réchauffement climatique par les gaz à effet de serre a accentué l’intérêt du butanol comme carburant alternatif dans le secteur des transports grâce à ses propriétés adaptées pour le moteur à allumage par compression. Cependant, le faible rendement des procédés de production et de séparation empêche encore sa commercialisation en tant que carburant. C’est pourquoi le mélange de fermentation intermédiaire de la production de butanol, Acétone-Butanol-Ethanol(ABE), est de plu

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13

Lamiel, Quentin. "Analysis of spray-wall impingement, fuel film spreading and vaporisation for reciprocating engine applications." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0092/document.

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Le transport routier est responsable d’une partie des émissions de polluants sur la planète. Conscient de ce problème, des lois sur les émissions des véhicules sont régulièrement votées afin de réduire l’impact environnemental du transport automobile. Ces lois de plus en plus restrictives ont poussé les fabricants automobiles à réduire la taille des moteurs essence et à utiliser des procédés d’injection directe afin d’augmenter le ratio puissance/volume des moteurs et réduire la consommation. Cependant avec l’utilisation de l’injection directe, de nouveaux problèmes apparaissent, notamment la

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14

Sphicas, Panagiotis. "High pressure and high temperature measurements on diesel sprays." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18063.

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Environmental, financial and legal reasons demand the development of cleaner diesel engines. Atomization, evaporation and mixing phenomena observed during injection of Diesel fuel affect the produced emissions. To study these phenomena, under engine-like conditions (50bar, 1000K), a chemically preheated constant volume chamber was built. A system of sensors, driven in real-time by a FPGA (Field Programmable Gate Array) and controlled by a Real Time Controller, was built to monitor and control the operations. A modern common rail fuel injection system (Bosch CP3) was driven by a purpose-modifie

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15

Islam, Moni. "Numerical and experimental investigations of high-pressure diesel sprays." Thesis, Imperial College London, 2002. http://hdl.handle.net/10044/1/7987.

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16

Chazelle, Téodor. "Etude expérimentale de l'injection de fluides à haute pression (supercritique) pοur une application de type moteurs-fusées". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMIR41.

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Un nombre grandissant d'applications met à profit l'injection de liquides au-dessus de leur point critique. Or, la physique de tels écoulements est mal comprise, en particulier les mécanismes régissant la transition d'une injection diphasique sous-critique à un mélange supercritique monophasique. L'objectif de ces travaux est de contribuer à la compréhension de ces phénomènes, en récoltant et analysant des données expérimentales qualitatives et quantitatives sur une injection multiespèce (éthane-azote) en conditions transcritiques et supercritiques. Pour cela, quatre diagnostics optiques sont

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17

Lacoste, Julien. "Characteristics of diesel sprays at high temperatures and pressures." Thesis, University of Brighton, 2006. https://research.brighton.ac.uk/en/studentTheses/c18efb01-4122-424b-9c08-d1aca3105421.

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A high-speed video camera was used to obtain photographs of a transient spray. The spray images were analysed to provide spray characteristics which include the spray tip penetration length, initial spray hesitation, nozzle opening time delay, hole-to-hole spray variation and spray structure. Both single and multi-hole nozzles were used to study these parameters. Fuel droplet characteristics within dense Diesel sprays were studied using Phase Doppler Anemometry (PDA) in an optical rapid compression machine. A comprehensive study of the PDA operating parameters was conducted. Additionally, the

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18

Abbas, A. J. "Descaling of petroleum production tubing utilising aerated high pressure flat fan water sprays." Thesis, University of Salford, 2014. http://usir.salford.ac.uk/33069/.

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Recent attempts to utilise solid particles in combination with high pressure water sprays has caused environmental and safety concern, in cleaning mineral and organic scale inside the Oil and Gas Production Tubing. To increase cleaning performance only high pressure aerated water sprays at high impact force instead should be used. Multi-nationals petroleum companies are facing immense challenges in removing the scale due to the decrease in cavitation bubbles along the production tubing when high pressure water sprays are applied. This has also resulted in high maintenance costs and low product

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19

Malbois, Pierre. "Analyse expérimentale par diagnostics lasers du mélange kérosène/air et de la combustion swirlée pauvre prémélangée, haute-pression issue d’un injecteur Low-NOx." Thesis, Normandie, 2017. http://www.theses.fr/2017NORMIR25/document.

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Les motoristes aéronautiques misent sur le développement de systèmes d’injection de carburant innovants pour réduire la consommation de carburant et les émissions de polluants. L’objectif de la thèse est de contribuer à l’étude expérimentale d’un injecteur « Lean Premixed » par le développement de diagnostics lasers couplant des approches basées sur la diffusion de Mie et l’émission fluorescente de traceurs. Les mesures ont été réalisées sur le banc de combustion haute pression HERON. Une approche novatrice avec l’imagerie de fluorescence du kérosène a permis d’obtenir une quantification du mé

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20

Widger, Ian Roy. "Improvements of high pressure water sprays used for coal dust extraction in mine safety." Thesis, University of Manchester, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386033.

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21

Aval, Sattar Motedayen. "A study of pulsed sprays in a high pressure and temperature gas cross flow." Thesis, University of Manchester, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333238.

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22

Thompson, Andrew P. "Effect of pressure and temperature on oil mist sprays used for blade excitation in high cycle fatigue testing." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FThompson_Andrew.pdf.

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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, June 2006.<br>Thesis Advisor(s): Raymond Shreeve. "June 2006." Includes bibliographical references (p. 131). Also available in print.

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23

Li, Qi. "Acoustic noise emitted from overhead line conductors." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/acoustic-noise-emitted-from-overhead-line-conductors(90a5c23c-a7fc-4230-bbab-16b8737b2af2).html.

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The developments of new types of conductors and increase of voltage level have driven the need to carry out research on evaluating overhead line acoustic noise. The surface potential gradient of a conductor is a critical design parameter for planning overhead lines, as it determines the level of corona loss (CL), radio interference (RI), and audible noise (AN). The majority of existing models for surface gradient calculation are based on analytical methods which restrict their application in simulating complex surface geometries. This thesis proposes a novel method which utilizes both analytic

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24

Giraldo, Valderrama Jhoan Sebastián. "Macroscopic and microscopic characterization of non-reacting diesel sprays at low and very high injection pressures." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/113643.

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En la exploración de nuevos métodos para el mejoramiento de la eficiencia y rendimiento del motor diésel, es claro que un gran esfuerzo debe estar enfocado en el proceso de inyección de combustible. La eficiencia de la combustión y las emisiones, se ven muy afectadas por el proceso de atomización, y se ha demostrado que incrementos en presiones de inyección conllevan un gran potencial para mejorar el ahorro de combustible, producir mejores mezclas de aire y combustible, y por tanto menor generación de emisiones contaminantes. Últimamente, las presiones de inyección han aumentado de alrededor d

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25

Levet, Vincent. "Development and Evaluation of Controlled-Release Cisplatin Dry Powders for Inhalation against Lung Tumours." Doctoral thesis, Universite Libre de Bruxelles, 2017. https://dipot.ulb.ac.be/dspace/bitstream/2013/249264/4/TOC.pdf.

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Lung cancer is the deadliest cancer in the world, with a global 5-year survival rate of about 15%. Despite a notable impact of the latest improvements in prevention, screening, detection and staging, the efficacy of conventional treatments is not sufficient and has reached a therapeutic plateau. These conventional treatments involve a combination of surgery, radiotherapy (RT) and chemotherapy (CT). CT is used in almost all stages: in operable and inoperable stages to limit tumour cell invasion and in latest stages as a palliative treatment. Cisplatin is one of the most frequently used and most

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26

Milea, Andrei-Silviu. "Experimental investigation of innovative Low NOx / low soot injection systems for spinning combustiοn technology using advanced laser diagnostics". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMIR43.

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Les effets anthropogéniques sur l’environnement posent un défi majeur pour l’industrie aéronautique. Des réglementations de plus en plus strictes et la nécessité de rendre le transport aérien durable orientent les recherches actuelles vers des systèmes propulsifs innovants. Dans ce contexte, Safran Helicopter Engines développe sa technologie brevetée de combustion giratoire (SCT), visant à améliorer les performances des moteurs d’hélicoptères. Déjà implémentée sur le moteur Arrano, cette technologie est davantage optimisée pour réduire significativement les émissions de NOx et de suies. Dans l

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27

Mühlbauer, Monika. "Modelling wall interactions of a high-pressure, hollow cone spray." Phd thesis, 2010. http://tuprints.ulb.tu-darmstadt.de/2019/2/DissMM_spraywall.pdf.

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Spray/wall interactions significantly influence air/fuel mixing and emissions in modern spark-ignited, direct injection engines. Yet, the complex phenomena are hardly understood - especially not with respect to the large number of parameters and the associated wide ranges occuring in an engine. Modelling spray/wall interactions thus presents a major drawback in numerical simulations done in engine development. This thesis focuses on the impact of dense, high-pressure hollow cone sprays for which existing wall interaction models are evaluated in detail and shown to fail. To the best of the auth

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28

Kumar, Sonu. "Experimental Investigation of Novel High Shear Injector at Elevated Pressure Conditions: Hydrodynamics, Spray and Combustion Characterization." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5949.

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The stringent pollution and emission norms due to the present climate change and global warming have pushed industries to meet these norms and cut down their emission levels. In the same pipeline, the aviation industries do not remain untouched. The emissions from aircraft engines burning fossil fuel, NOx, CO, unburnt hydrocarbon, etc., affect the atmosphere's upper layer temperature and air quality. These increasing number of air-transport demands and strict emission norms have forced the aviation industry to develop a next-generation aero-engine that can burn fossil fuel more efficiently and

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29

Senekal, Hendrik Johannes. "Evaluation of high pressure water spray systems as a control measure to reduce silica exposure in underground gold mines." Thesis, 2017. https://hdl.handle.net/10539/24902.

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A research report submitted to the Faculty of Health Science, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Public Health. Johannesburg, September 2017.<br>Gold mining has always played a major role in the South African economy. Unfortunately, workers’ health could be at risk as exposure to respirable quartz could cause silicosis. Silicosis has no cure or treatment and the only means to prevent silicosis is to reduce exposure to as low a level as possible. This study tested the effectiveness of a high-pressure water spray

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30

El-Hannouny, Essam M. "Spray charateristics and engine emissions from hydraulically actuated high pressure injection systems for use in an HSDI diesel engine." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.

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31

Deshmukh, Devendra. "Studies On Automization And Sprays Of Plant Oil Biofuels Using Laser-Based Diagnostics." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/2419.

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Atomization characteristics of liquid fuel sprays control combustion efficiency and emissions in engines. The present work is motivated by the need to study the atomization and spray structure of vegetable oil biofuels for which no data in the literature exists. In this work, various laser-based diagnostic techniques such as laser shadowgraphy, Particle/Droplet Image Analysis (PDIA) and Laser Sheet Dropsizing (LSD) are applied for studying atomization characteristics, tip penetration, droplet size and liquid volume fraction of Pongamia vegetable oil (SVO) and its blends with diesel. A consta

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32

Deshmukh, Devendra. "Studies On Automization And Sprays Of Plant Oil Biofuels Using Laser-Based Diagnostics." Thesis, 2011. http://etd.iisc.ernet.in/handle/2005/2419.

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Atomization characteristics of liquid fuel sprays control combustion efficiency and emissions in engines. The present work is motivated by the need to study the atomization and spray structure of vegetable oil biofuels for which no data in the literature exists. In this work, various laser-based diagnostic techniques such as laser shadowgraphy, Particle/Droplet Image Analysis (PDIA) and Laser Sheet Dropsizing (LSD) are applied for studying atomization characteristics, tip penetration, droplet size and liquid volume fraction of Pongamia vegetable oil (SVO) and its blends with diesel. A constan

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33

Ananta, Edwin [Verfasser]. "Impact of environmental factors on viability and stability and high pressure pretreatment on stress tolerance of Lactobacillus rhamnosus GG (ATCC 53103) during spray drying / vorgelegt von Edwin Ananta." 2005. http://d-nb.info/976924277/34.

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34

Su, Tzay-Fa. "An experimental study of high injection pressure diesel sprays." 1995. http://catalog.hathitrust.org/api/volumes/oclc/34316119.html.

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35

Hung, Calvin C. "Insights into droplet behavior within high pressure diesel sprays." 1998. http://catalog.hathitrust.org/api/volumes/oclc/41249979.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1998.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 179-183).

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