半封闭通道射流冲击孔流量系数的实验

Experimental investigation on discharge coefficient of jet impingement holes within semi-confined channel

对半封闭通道射流冲击孔的流量系数进行了实验研究,针对单排、双排冲击孔结构,在变化各种几何参数及流动参数的情况下,较为系统地获得了射流孔展向间距与射流孔直径之比、射流孔流向间距与射流孔直径之比、射流冲击间距与射流孔直径之比、射流孔倾角等因素对于流量系数随射流雷诺数的变化曲线.通过对比分析,讨论了各种因素对流量系数的影响.

An experimental investigation for determining the discharge coefficient of jet impingement holes within semi-enclosed channel was performed. According to the jet impingement configurations with single row or double row holes, the effects of the holes arrangement and flow parameter on the discharge coefficient were considered, such as： the span holes pitch-to-diameter ratio, the streamwise holes pitch-to-diameter ratio, the impingement distance-to-diameter ratio, the jet oblique angle and the jet Reynolds number. Comparatively, the above factors on the discharge coefficient were discussed.