压缩喷嘴孔径对火焰浮起长度的影响

This paper reports on the experimental investigation of the flame lift-off length for five different orifice diameters (.0.100, .0.130, .0.160, .0.190, and .0.227 mm) of a diesel injector nozzle. The flame lift-off was determined from the measurement of 308 nm OH chemiluminescence for different fuel injection pressures using commercial diesel fuel and a Common Rail fuel injection equipment of passenger car size. The fuel injection pressures were 450, 900, and 1350 bar. The experiments were conducted at air pressures of 30, 50, 70, and 90 bar and at an air temperature of 750 K in a constant pressure spray chamber. It was observed that the flame lift-off length increases with increased injection pressure and increased orifice diameter. PLIF平面激光诱导荧光火焰燃烧检测系统 汽车发动机多参量测试系统