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为揭示等离子体气动激励抑制高负荷压气机叶栅流动分离的作用效果和主要影响因素,在不同流场和激励条件下开展了等离子体流动控制的实验研究,介绍介质阻挡放电等离子体的产生原理与放电图像,利用栅后压力分布分析研究叶栅内部流场结构以及等离子体激励的变化规律和主要影响因素。结果表明:等离子体气动激励抑制附面层流动分离的作用效果随气流速度的增大逐渐下降,在攻角为2°时最佳,然后随攻角的增大激励效果显著下降;激励器电极的放电位置至关重要,在靠近角区分离线的起点时的激励效果明显强于其他位置;对等离子体气动激励的作用方式进行优化,变定常激励为非定常激励,使其与分离区的时间尺度实现最佳的耦合,是提高等离子体流动控制效果的一个重要途径。
In order to reveal the effect and the main influencing factors of the plasma aerodynamic excitation to suppress the flow separation of high load compressor cascade, the experimental research of plasma flow control under different flow field and excitation conditions is introduced. The generation principle of dielectric barrier discharge plasma And discharge images, the pressure distribution inside the cascade was used to analyze the flow field structure and the variation of plasma excitation and the main influential factors. The results show that the effect of the plasma aerodynamic excitation to inhibit the flow separation of the laminates gradually decreases with the increase of the air velocity and is best when the angle of attack is 2 °. Then the excitation effect of the plasma decreases with the increase of the angle of attack. Of the discharge location is crucial, near the corner of the starting point of the separation line when the excitation effect is significantly stronger than other locations; the role of the plasma aerodynamic excitation optimization, variable constant excitation for unsteady excitation, and its separation zone time Achieving optimal coupling on the scale is an important way to improve plasma flow control.