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International Journal of Automotive Technology > Volume 3(1); 2002 > Article
International Journal of Automotive Technology 2002;3(1): 9-15.
PROPAGATION PROCESSES OF NEWLY DEVELOPED PLASMA JET IGNITER
Masaya Ogawa1, Hisatoshi Sasaki1, Koji Yoshida1, Hideo Shoji1, Hidenori Tanaka2
1Nihon University
2The National Defense Academy
ABSTRACT
In plasma jet ignition, combustion enhancement effects occur toward the plasma jet issuing direction. Therefore, when the igniter is attached at the center of a cylindrically shaped combustion chamber, plasma jet should issue toward the round combustion chamber wall. The plasma jet igniter that had an annular circular orifice has been developed. The purpose of this study is to elucidate the relationship between the newly developed plasma jet igniter configuration and combustion enhancement effects. In this newly developed plasma jet igniter, flame front wrinkle appears on the flame front and flame propagates rapidly. Plasma jet influences on the flame propagation for long period when the plasma jet igniter has issuing angle 90 degrees and large cavity volume, because the plasma jet only lasts several ms. However, in the early stage of combustion, flame front area of issuing angle 45 degrees is larger than that of 90 degrees, because the initial flame kernel is formed by the plasma jet.
Key Words: Plasma jet ignition, Combustion enhancement, Issuing angle
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