Modeling Superheated Fuel Sprays And Vaporization For Gdi Engines Using Single And Multi Component Fuel Models
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Modeling Superheated Fuel Sprays And Vaporization For Gdi Engines Using Single And Multi Component Fuel Models
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Author : André Marques Gomes
language : en
Publisher:
Release Date : 2001
Modeling Superheated Fuel Sprays And Vaporization For Gdi Engines Using Single And Multi Component Fuel Models written by André Marques Gomes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
An Experimental Investigation Of A Homogeneous Charge Compression Ingnition Engine Using Low Pressure Injection And Diesel Fuel
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Author : Eric John Hruby
language : en
Publisher:
Release Date : 2003
An Experimental Investigation Of A Homogeneous Charge Compression Ingnition Engine Using Low Pressure Injection And Diesel Fuel written by Eric John Hruby and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Droplets And Sprays
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Author : Saptarshi Basu
language : en
Publisher: Springer
Release Date : 2017-12-11
Droplets And Sprays written by Saptarshi Basu and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-11 with Technology & Engineering categories.
This book focuses on droplets and sprays relevant to combustion and propulsion applications. The book includes fundamental studies on the heating, evaporation and combustion of individual droplets and basic mechanisms of spray formation. The contents also extend to the latest analytical, numerical and experimental techniques for investigating the behavior of sprays in devices like combustion engines and gas turbines. In addition, the book explores several emerging areas like interactions between sprays and flames and the dynamic characteristics of spray combustion systems on the fundamental side, as well as the development of novel fuel injectors for specific devices on the application side. Given its breadth of coverage, the book will benefit researchers and professionals alike.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2004
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Dissertations, Academic categories.
Proceedings Of The Intersociety Energy Conversion Engineering Conference
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Author :
language : en
Publisher:
Release Date : 2002
Proceedings Of The Intersociety Energy Conversion Engineering Conference written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Direct energy conversion categories.
Annual Index Abstracts Of Sae Technical Papers
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Author :
language : en
Publisher:
Release Date : 2002
Annual Index Abstracts Of Sae Technical Papers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Automobiles categories.
Cfd Modeling Of Superheated Fuel Sprays
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2019-01-13
Cfd Modeling Of Superheated Fuel Sprays written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-01-13 with Science categories.
An understanding of fuel atomization and vaporization behavior at superheat conditions is identified to be a topic of importance in the design of modern supersonic engines. As a part of the NASA aeronautics initiative, we have undertaken an assessment study to establish baseline accuracy of existing CFD models used in the evaluation of a ashing jet. In a first attempt towards attaining this goal, we have incorporated an existing superheat vaporization model into our spray solution procedure but made some improvements to combine the existing models valid at superheated conditions with the models valid at stable (non-superheat) evaporating conditions. Also, the paper reports some validation results based on the experimental data obtained from the literature for a superheated spray generated by the sudden release of pressurized R134A from a cylindrical nozzle. The predicted profiles for both gas and droplet velocities show a reasonable agreement with the measured data and exhibit a self-similar pattern similar to the correlation reported in the literature. Because of the uncertainty involved in the specification of the initial conditions, we have investigated the effect of initial droplet size distribution on the validation results. The predicted results were found to be sensitive to the initial conditions used for the droplet size specification. However, it was shown that decent droplet size comparisons could be achieved with properly selected initial conditions, For the case considered, it is reasonable to assume that the present vaporization models are capable of providing a reasonable qualitative description for the two-phase jet characteristics generated by a ashing jet. However, there remains some uncertainty with regard to the specification of certain initial spray conditions and there is a need for experimental data on separate gas and liquid temperatures in order to validate the vaporization models based on the Adachi correlation for a liquid involving R134A.
Modeling Multicomponent Fuel Sprays In Engines With Application To Diesel Cold Starting
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Author : Nabil S. Ayoub
language : en
Publisher:
Release Date : 1995
Modeling Multicomponent Fuel Sprays In Engines With Application To Diesel Cold Starting written by Nabil S. Ayoub and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Modeling Multi Component Fuel Evaporation Flame Propagation And Chemical Kinetics Processes For Gdi Engines
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Author : Shiyou Yang
language : en
Publisher:
Release Date : 2010
Modeling Multi Component Fuel Evaporation Flame Propagation And Chemical Kinetics Processes For Gdi Engines written by Shiyou Yang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Numerical Investigation Of Spray Characterization Of Heater Gdi System
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Author :
language : en
Publisher:
Release Date : 2020
Numerical Investigation Of Spray Characterization Of Heater Gdi System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Abstract : Gasoline engines require fuel enrichment at low temperature cranking (cold start) conditions for efficient engine operation. Since the amount of fuel injected is high at cold start to compensate low fuel evaporation, fuel sprays tend to impinge on the cold surfaces of the piston and cylinder walls leading to the formation of excessive unburned hydrocarbons. One of the ways to ensure reliable cold start performance and to reduce UHC emissions is to have the fuel subjected to preheating. The objective of this study is to investigate the effects of fuel preheating on Gasoline Direct Injection sprays to improve the mixture preparation during the cold start conditions. Injection of fuel sprays of neat gasoline and gasoline-ethanol blends (E10 and E85) from the heater-injector into a constant volume combustion chamber was studied. Computational Fluid Dynamics (CFD) simulations of the fuel flow through the injector were performed to understand the impact of the heater in improving the mixture preparation quality. The gasoline was modelled with 14 component surrogate fuel model to capture its physical properties and distillation characteristics. Fuel spray processes in the Constant Volume Combustion Chamber (CVCC) were simulated using an in-house CFD code, MTU-KIVA. Parametric simulations were performed at different injection pressures and at a wide range of fuel temperature ranging from -6°C to 250°C. The simulation of injector internal flow could improve the spray simulations in the CVCC by providing accurate velocity and temperature distributions of fuel sprays at the exit of individual nozzles. The results show that the injector with the preheating system performs reliably at cold start conditions to increase the fuel temperature from -6°C to 75°C in less than a second. The spray were in good agreement between the measurements and predictions. For the given operating range, the spray changes from normal evaporation to flash boiling regime. The model captures the spray collapsing behaviour for the flash boiling conditions. However, the model tends to over-predict the spray penetration for fuel temperatures in the higher range of boiling/flash boiling, regardless of the injection pressure variation.