706 Numerical Analysis of Mixture Formation Process in Premixed Compression Ignition Engines

2000 ◽  
Vol 2000.75 (0) ◽  
pp. _7-11_-_7-12_
Author(s):  
Tomoyuki WAKISAKA ◽  
Thanh Tung NGUYEN ◽  
Shin-ichi TAKEUCHI ◽  
Yoshihiro ISSHIKI
Keyword(s):  
Numerical Analysis ◽  
Formation Process ◽  
Compression Ignition ◽  
Mixture Formation ◽  
Compression Ignition Engines

Numerical Analysis of Mixture Formation Process in a Swirl-Type Injector

2000 ◽  
Vol 2000.4 (0) ◽  
pp. 315-316
Author(s):  
Yasuo MORIYOSHI ◽  
Masahide TAKAGI ◽  
Xiao HU
Keyword(s):  
Numerical Analysis ◽  
Formation Process ◽  
Mixture Formation

Numerical Analysis of Combustion in Gasoline Compression Ignition Engines

2002 ◽  
Author(s):  
Koudai Yoshizawa ◽  
Atsushi Teraji ◽  
Eiji Aochi ◽  
Masaaki Kubo ◽  
Shuji Kimura
Keyword(s):  
Numerical Analysis ◽  
Compression Ignition ◽  
Compression Ignition Engines

scholarly journals Numerical Study on the Required Surrounding Gas Conditions for Stable Autoignition of an Ethanol Spray

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Hironori Saitoh ◽  
Koji Uchida ◽  
Norihiko Watanabe
Keyword(s):  
Formation Process ◽  
High Performance ◽  
Alternative Fuels ◽  
Fuel Injection ◽  
Numerical Study ◽  
Gas Pressure ◽  
Compression Ignition ◽  
Mixture Formation ◽  
Diesel Fuels ◽  
Heat Of Evaporation

This study deals with the development of controlled-ignition technology for high-performance compression ignition alcohol engines. Among the alcohol fuels, we focus on ethanol as it is a promising candidate of alternative fuels replacing petroleum. The objective of this study is to reveal the physical and chemical phenomena in the mixture formation process up to autoignition of an ethanol spray. In our previous numerical study, we showed the mixture formation process for gas oil and ethanol sprays in the form of spatial excess air ratio and temperature distributions inside a spray and their temporal histories from fuel injection. The results showed a good agreement with those of theoretical analysis based on the momentum theory of spray penetration. Calculation was also confirmed as reasonable by comparing to the experimental results. Through the series of our experimental and numerical studies, the reason for poor autoignition quality of an ethanol spray was revealed, that is, difficulty in simultaneous attainments of autoignition-suitable concentration and temperature in the spray mixture formation due to its fuel and thermal properties of smaller stoichiometric air-fuel ratio and much greater heat of evaporation compared to conventional diesel fuels. However, autoignition of an ethanol spray has not been obtained yet in either experiments or numerical analysis. As the next step, we numerically examined several surrounding gas pressure and temperature conditions to make clear the surrounding gas conditions enough to obtain stable autoignition. One of the commercial CFD codes CONVERGE was used in the computational calculation with the considerations of turbulence, atomization, evaporation, and detailed chemical reaction. Required surrounding gas pressure and temperature for stable autoignition with acceptable ignition delay of an ethanol spray and feasibility of the development of high-performance compression ignition alcohol engines are discussed in this paper.

scholarly journals Numerical Prediction of Mixture Formation and Combustion Processes in Premixed Compression Ignition Engines.

2003 ◽  
Vol 46 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Shin-ichi TAKEUCHI ◽  
Tomoyuki WAKISAKA ◽  
Nobusato KATO ◽  
Thanh Tung NGUYEN ◽  
Keiichi OKUDE ◽  
...  
Keyword(s):  
Numerical Prediction ◽  
Compression Ignition ◽  
Mixture Formation ◽  
Compression Ignition Engines ◽  
Combustion Processes

Effects of Injection Conditions on Mixture Formation Process in a Premixed Compression Ignition Engine

2000 ◽  
Author(s):  
Je-Hyung Lee ◽  
Shinichi Goto ◽  
Tadashi Tsurushima ◽  
Takeshi Miyamoto ◽  
Tomoyuki Wakisaka
Keyword(s):  
Formation Process ◽  
Compression Ignition ◽  
Mixture Formation ◽  
Compression Ignition Engine
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