水素火炎ジェット点火法による燃焼制御 : ノズル部における熱流束

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  • Control of Combustion in Closed Chamber by Hydrogen Flame Jet Ignition : Heat Flux at Nozzle
  • スイソ カエン ジェット テンカホウ ニ ヨル ネンショウ セイギョ(ノズルブ ニ オケル ネツ リュウソク)

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説明

A jet ignition method by hydrogen flame jet is proposed to control the combustion of lean mixtures. Hydrogen flame jet is supplied from the cavity whose volume is less than one percent of the main chamber volume through the nozzle. It is worried that the heat loss of the jet ignition method becomes bigger than that of conventional ignition, because this method creates fast and high temperature flame jet. Especially at the nozzle, the heat loss might become bigger than other place. So the heat flux at the nozzle wasmeasured, and the relation between the jet velocity or flame temperature and heat flux were shown. The faster the flame jet is, the bigger the heat flux at the nozzle is. And the heat flux increases with the temperature of the jet. On the other hand, the total heat loss at the nozzle increases with the jet temperature, but the effect of the jet velocity on the heat loss is not so big.

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