Effects of Supercharging, Swirl Strength and Fuel Injection Pressure on Development and Combustion of Diesel Spray

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  • 過給・スワール強度・燃料噴射圧力がディーゼル噴霧の発達および燃焼に及ぼす影響
  • カキュウ スワール キョウド ネンリョウ フンシャ アツリョク ガ ディーゼル フンム ノ ハッタツ オヨビ ネンショウ ニ オヨボス エイキョウ

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Abstract

Interaction of fuel spray and surrounding air plays important role to mixture formation, ignition and combustion processes in diesel combustion. Effects of supercharging, swirl strength and fuel injection pressure on development, ignition and combustion process of diesel spray were investigated by using free pisto type rapid compression machine. Detailed observation of the spray was carried out by visualization including schlieren photography and direct photography. The experiments show the results as below. There is an optimum strength in swirl for favorable mixture formation. Higher supercharging pressure makes swirl more effective. Higher injection pressure increases the amount of well-prepared mixture prior to ignition, thus it results less smoke.

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