圆喷嘴亚声速空气冲击射流壁面压力规律实验研究

Wall Pressure Distributions of Subsonic Round Air Impinging Jets

针对圆形喷嘴亚声速空气冲击射流,对多种不同工况下壁面压力分布规律进行了实验研究,实验结果表明壁面压力规律近似遵循高斯分布。为了得到精确的分布关系式,首先建立了高斯分布中压力分布半宽度与喷距的关系,在此基础上对不同工况下的高斯分布进行修正,给出修正关系式,有效地降低了单纯用高斯分布的误差。最后给出了压力分布范围与喷距的关系,为实际使用提供帮助。

Focused on the subsonic round air impinging jet, this study measures the wall pressure distributions under different working conditions. The results show that the wall pressure distributions are nearly Gaussian distributions. In order to get a precise pressure distribution relation, first this study gives the relationship between the pressure distribution half width and the impinging height. Based on this, the Gaussian distribution relation is modified under different working conditions. Modified relations largely reduce the error compared with using merely Gaussian distribution. Finally, the relationship between the wall pressure range and the impinging height is given, which is helpful in practice.