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Enhancement of Ignition and Burning Rate of Lean Mixtures by Pulsed Flame Jet (PFJ) 2010.08.30

Eiichi Murase(Professor)Staff information
Osamu Moriue(Associate Professor)Staff information
fig1)PFJ ignition compared with conventional ignition (Schlieren photographs)
[ 研究概要 ] For combustion in lean fuel-air mixtures, achievement of adequate reliability of ignition and sufficiently high burning rate are required. The injection of active radicals by means of PFJ (Pulsed Flame Jet) ignition system ist studied for this purpose. The PFJ igniter is of the same size and shape as the conventional spark plug, and it contains a small cavity and an orifice. Rich fuel-air mixture is injected into the cavity and ignited there by spark discharge. Thus a jet of incomplete combustion products issues from the orifice to form a turbulent jet plume consisting of large scale vortex structures where the process of combustion in the combustion chamber is initiated. [ Related Key Word ] Active Radicals | Internal Combustion Engine | Jet Ignition | Laser Induced Fluorescence | Lean Mixtures | Rapid Compression Machine [ Related URL ]  http://www.mech.kyushu-u.ac.jp/~esl/index-e.html

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