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在压气机叶栅端壁20%,40%和60%弦长处布置了3组等离子体激励器.利用微型五孔压力探针测量了施加等离子体激励前后压气机叶栅尾迹的流场.测量结果表明3组激励器同时工作时对总压损失和流动阻塞改善的效果最好.各组等离子体激励器独立工作时,20%弦长处的等离子体激励能够最有效的改善流动阻塞;60%弦长处的激励对总压损失的改善比较好;而40%弦长处的激励则会恶化总压损失.总之在叶栅端壁施加等离子体激励对端壁二次流有较明显影响,激励位置是影响作用效果的关键因素.
Three sets of plasma actuators were arranged at the 20%, 40% and 60% chord length of the compressor cascade endwall.The flow field of the compressor cascade wake before and after the plasma excitation was measured by a micro five-hole pressure probe.The measurement The results show that the three groups of stimulators work simultaneously to improve the total pressure loss and flow blocking the best effect.Each plasma actuator group work independently, 20% chord plasma excitation at the most effective way to improve the flow of obstruction; 60% The excitation at the chord length is better for the total pressure loss, while the 40% chord length will worsen the total pressure loss.In summary, the plasma excitation at the endwall of the cascade has a more significant effect on the secondary flow in the endwall, Is the key factor affecting the effect.