S弯进气道中静压场研究

本文给出了 S弯进气道出口截面上的静压场测量结果。研究表明 ,在不同的进气攻角下 ,S弯进气道出口截面上的静压是不均匀的。攻角愈大 ,静压场畸变愈严重。在进行旋流场研究中 ,如果攻角较大 ,需认真考虑以往壁面 4点线性加权平均压力场处理所带来的误差影响

INVESTIGATION OF STATIC PRESSURE FIELD IN AN S-SHAPED AIR INTAKE

The static pressure fields in an s shaped diffuser with rectangular cross section have been measured at different incidences.The results show that the static pressure field at the duct exit is non uniform.The higher the angle of attack is,the larger the distortion of the static pressure field.The pressure near the boundaries of the model is higher than that near the core,which is mainly caused by both the distorted total pressure field and the distorted flow velocity field.Further investigation on whirling flow field demonstrates that it is neccessary to take into serious consideration the deviation between the experimental measurements and the weighted averages by the use of the wall static pressures of the model at high incidence.