Numerical Modeling for Auto-Ignition and Combustion Processes of Fuel Sprays in High-Pressure Environment

2001 ◽  
Author(s):  
Yongwook Yu ◽  
Seong-Ku Kim ◽  
Yong-Mo Kim
Keyword(s):  
High Pressure ◽  
Numerical Modeling ◽  
Fuel Sprays ◽  
Auto Ignition ◽  
Ignition And Combustion ◽  
Combustion Processes ◽  
High Pressure Environment

Spark-Ignition and Combustion Characteristics of High-Pressure Hydrogen and Natural-Gas Intermittent Jets

2008 ◽  
Vol 130 (6) ◽  
Author(s):  
Ali Mohammadi ◽  
Masahiro Shioji ◽  
Yuki Matsui ◽  
Rintaro Kajiwara
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Ambient Pressure ◽  
Direct Injection ◽  
Injection Pressure ◽  
Spark Ignition ◽  
Constant Volume Combustion Chamber ◽  
Si Engines ◽  
Ignition And Combustion ◽  
Combustion Processes

Recently, an in-cylinder injection method has been considered for the improvement of thermal efficiency in natural-gas and hydrogen spark-ignition (SI) engines. However, the SI and combustion processes of gaseous jets are not well understood. The present study aims to provide fundamental data for the development of direct-injection SI gas engines. The ignition, combustion, and flame behavior of high-pressure and intermittent hydrogen and natural-gas jets in a constant volume combustion chamber were investigated. The effects of injection pressure, nozzle size, ambient pressure, and spark location were also investigated for various spark timings and equivalence ratios.

Modeling of Auto-Ignition and Combustion Processes for Dual-Component Fuel Spray

2011 ◽  
Vol 4 (2) ◽  
pp. 2193-2206 ◽  
Author(s):  
Yoshimitsu Kobashi ◽  
Kenta Fujimori ◽  
Hiroki Maekawa ◽  
Satoshi Kato ◽  
Daisuke Kawano ◽  
...  
Keyword(s):  
Fuel Spray ◽  
Auto Ignition ◽  
Ignition And Combustion ◽  
Combustion Processes

Auto-Ignition and Numerical Analysis on High-Pressure Combustion of Premixed Methane-Air mixtures in Highly Preheated and Diluted Environment

2021 ◽  
pp. 1-23
Author(s):  
Subrat Garnayak ◽  
Ayman M Elbaz ◽  
Olawole Kuti ◽  
Sukanta Kumar Dash ◽  
William L Roberts ◽  
...  
Keyword(s):  
High Pressure ◽  
Numerical Analysis ◽  
Auto Ignition

Thermoelastohydrodynamic Behavior of Mechanical Gas Face Seals Operating at High Pressure

2007 ◽  
Vol 129 (4) ◽  
pp. 841-850 ◽  
Author(s):  
Sébastien Thomas ◽  
Noël Brunetière ◽  
Bernard Tournerie
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
Numerical Modeling ◽  
Face Seal ◽  
Inertia Effects ◽  
Real Gas ◽  
Choked Flow ◽  
Face Seals ◽  
Mechanical Face Seal ◽  
Gas Expansion

A numerical modeling of thermoelastohydrodynamic mechanical face seal behavior is presented. The model is an axisymmetric one and it is confined to high pressure compressible flow. It takes into account the behavior of a real gas and includes thermal and inertia effects, as well as a choked flow condition. In addition, heat transfer between the fluid film and the seal faces is computed, as are the elastic and thermal distortions of the rings. In the first part of this paper, the influence of the coning angle on mechanical face seal characteristics is studied. In the second part, the influence of the solid distortions is analyzed. It is shown that face distortions strongly modify both the gap geometry and the mechanical face seal’s performance. The mechanical distortions lead to a converging gap, while the gas expansion, by cooling the fluid, creates a diverging gap.

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