Passive control of shock-boundary layer interaction in transonic axial compressor cascade flow
Passive control of shock-boundary layer interaction in transonic axial compressor cascade flow
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DOI：
10.1007/978-3-7091-9310-5_24
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
S. Yu;G. Schnerr;U. Dohrmann;O. Sadi
中科院分区：
文献类型：
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作者：
S. Yu;G. Schnerr;U. Dohrmann;O. Sadi
本文的研究对象是轴向跨/超声速压气机叶栅的通风流场。这是中国科学院工程热物理研究所和卡尔斯鲁厄大学流体力学与流体机械研究所的联合研究项目。通过对激波-边界层干扰的被动控制可以减少叶栅流中的损失。被动控制是通过在叶片吸力面激波干扰区设置一个覆盖多孔板的空腔来实现的。沿多孔表面的静压梯度沿着启动通过空腔的流动，该流动自动地平滑穿过激波的压力跳变。实验是在中国科学院叶栅风洞和中国科学院流体力学与流体机械研究所超声速风洞中安装的叶栅元件上进行的。数值结果是在卡尔斯鲁厄大学通过求解2-D雷诺平均Navier-Stokes方程的显式，时间相关的有限体积法。叶栅和叶栅元件的实验结果表明，总损失相对减少14 - 15%，等熵效率提高约2%。在定常粘性流动的数值模拟中，总损失降低了5%以上，等熵效率提高了近1%。
The object of this investigation is the ventilated flow through an axial transonic/supersonic compressor cascade. It is a joint research project between the Chinese Academy of Sciences, Institute of Engineering Thermophysics and the University of Karlsruhe (TH), Institute for Fluid Mechanics and Fluid Machinery. Losses in the cascade flow can be reduced by passive control of the shock-boundary layer interaction. The passive control is realized by a cavity covered with a porous plate which is located at the interference region of the shock at the suction side of the blade. The static pressure gradient along the porous surface initiates a flow through the cavity which smoothes the pressure jump across the shock automatically. Experiments are performed in a cascade wind tunnel of the Chinese Academy of Sciences and in a cascade element being installed in the supersonic wind tunnel of the Institute for Fluid Mechanics and Fluid Machinery. Numerical results are obtained at the University of Karlsruhe by solving the 2-D Reynolds averaged Navier-Stokes equation with an explicit, time-dependent finite volume method. Experimental results in the cascade and in the cascade element yield a relative reduction of the total loss of 14 – 15% and an improvement of the isentropic efficiency of about 2%. In the numerical simulation of stationary viscous flow the total loss reduces by more than 5% and the isentropic efficiency increases by nearly 1%.