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实验研究了非定常等离子体射流对低速单转子轴流压气机稳定工作范围的影响。实验在低速单转子轴流压气机实验台上开展,在压气机转子前缘处布置一组等离子体激励器,通过施加非定常等离子体激励,在压气机转速为1500～2400r/min下实现了压气机扩稳。实验测量表明需要协调好激励器布置位置和激励强度之间的矛盾,将激励器靠近转子前缘对叶尖泄漏流的作用更强,不过距离转子过近会造成激励器与叶片之间易于爬电,这样无法提高激励强度,反而不利于扩稳,通过反复实验,发现在转子前缘19 mm布置激励器时不会发生爬电且扩稳效果比较理想。为了对等离子体诱导射流发生的反作用力有定量认识,利用电子天平测量了不同激励电压下反作用力的大小。
The effect of unsteady plasma jet on the stable working range of low speed single rotor axial flow compressor was experimentally studied. Experiments were carried out on a low-speed single-rotor axial-flow compressor test bench. A set of plasma actuators were arranged at the front of the compressor rotor. By applying unsteady plasma excitation, the experiments were carried out at a compressor speed of 1500-2400 r / min Compressor expansion. Experimental measurements show that there is a need to coordinate the contradiction between the actuator placement and the excitation intensity. The effect of the actuator close to the rotor leading edge on the tip leakage flow is stronger, however, too close to the rotor will cause the exciter and blade to climb easily Electricity, so can not improve the excitation intensity, but not conducive to stability, through repeated experiments and found that the rotor at the front edge of 19 mm arrangement of exciter creep does not occur and the expansion of the better results. In order to have a quantitative understanding of the reaction force induced by the plasma-induced jet, the magnitude of the reaction force at different excitation voltages was measured using an electronic balance.