等离子体气动激励抑制压气机叶栅角区流动分离的仿真与实验

进行了等离子体气动激励抑制低速压气机叶栅角区流动分离的数值仿真研究，并进行了实验验证。小攻角情况下，叶片吸力面角区流动分离导致显著的尾迹总压损失。来流速度为50m/s（雷诺数为223000）时，等离子体气动激励可以有效的抑制角区流动分离，降低总压损失。激励电压、频率分别为10kV和22kHz时，50%叶高处的尾迹压力分布基本不变，60%、70%叶高处的最大总压损失分别减小了13.83%和10.74%。增加激励电极组数或激励电压，可以增强抑制效果。

Computational and experimental investigation of plasma aerodynamic actuation based corner flow separation control in a compressor cascade

Plasma aerodynamic actuation based corner flow separation control in a compressor cascade was investigated both computationally and experimentally. Three dimensional corner flow separation, which forms over the suction surface and end wall corner of a compressor cascade blade passage, causes significant total pressure loss even when the incidence is 0 deg. When the free stream velocity is 50m/s(corresponding Reynolds number is 223,000), plasma aerodynamic actuation controls the corner flow separation effectively. When the actuation voltage and frequency are 10kV and 22kHz respectively, maximum relative reductions of total pressure loss coefficient at 60% and 70% blade span are 13.83% and 10.74% respectively. Increasing the actuation voltage or the number of electrode pair can enlarge the actuation strength and then improve the control effect.