摘要
为了解不同的雷诺数和出流比情况下各种因素对压力损失系数的影响,对有侧流梯形扰流柱通道端壁的静压和压力损失系数进行了实验测量。结果表明:出流比对端壁的静压分布和压力损失有较大影响,雷诺数的影响较小。出流比不为1时,端壁表面静压沿径向变化较小,在实验段入口和出口处较大,在中间段略低;在弦向方向上,静压变化相对较为剧烈,从通道左边到右边的弦向出口,静压分布趋势是递减的,在扰流柱左边压力变化梯度较小,弦向出口附近压力变化梯度较大。出流比为1时,端壁静压的变化主要集中在弦向方向上,压力损失系数随雷诺数的增加而降低,但是变化幅度相对较小;压力损失系数随着出流比变化相对较大,压力损失系数随着出流比的增大而减小。
The effect of each parameter on distribution of static pressure and pressure loss coefficient are found out. Experiments have been carried out in trapezoidal duct with staggered pin-fin arrays. The result reveals that the ratio of lateral-to-total flow rate has a remarkable effect on distribution of static pressure and pressure loss coefficient, and Re＇s effect is small. When the ratio of lateral-to-total flow rate wasn＇t 1 （C≠1）, the variety in static pressure along radial is not remarkable, At the entrance and exit of test segment, the static pressure is higher than that at the middle. At chordwise variety in static pressure is intense. The change in static pressure is much larger at the exit than that at the left of the pin-fin. The change in static pressure of the end wall was happened along chordal direction in case of C=1. The effect of lateral-to-total flow rate on pressure loss coefficient is much higher than the Re number＇s. The pressure loss coefficient is decreased with increasing in C ration.
出处
《物理测试》
CAS
2006年第4期15-18,共4页
Physics Examination and Testing
关键词
扰流柱
静压
压力损失系数
pin-fin
static pressure
pressure loss coefficient
