等离子体合成射流激励器高速流场逆向喷流控制
收稿日期: 2022-07-09
修回日期: 2022-07-27
录用日期: 2022-08-16
网络出版日期: 2022-08-31
Reverse jet flow control by plasma synthetic jet actuator in high speed flow field
Received date: 2022-07-09
Revised date: 2022-07-27
Accepted date: 2022-08-16
Online published: 2022-08-31
激波作为伴随高速飞行存在的特殊气动现象，对飞行器的安全与性能发挥具有重要影响。有效的流动控制对改善飞行器的气动力/热环境具有重要意义。等离子体具有结构简单、质量小、频响快、激励带宽大、激励强度可调节、易于布置且无附属控制系统等优点，近年来逐渐受到关注。利用高速纹影和激光动态压力传感器技术，详细研究了等离子体合成射流逆向喷流对弓形脱体激波流动控制非定常过程。研究结果表明：等离子体合成射流具有较强的流动控制作用，控制时间超过600 μs。随着射流压力下降，调控的弓形激波呈现出短模态和长模态变化。2个模态调制过程对模型均有一定程度的减阻效果。
李铮 , 徐聪 , 张健 , 李萌萌 , 马祎蕾 , 白光辉 . 等离子体合成射流激励器高速流场逆向喷流控制[J]. 航空学报, 2022 , 43(S2) : 225 -232 . DOI: 10.7527/S1000-6893.2022.27789
As a special aerodynamic phenomenon accompanying high-speed flight， shock wave has an important impact on the safety and performance of aircraft. Effective flow control has great significance in improving the aerodynamic/thermal environment of aircraft. Plasma has attracted more and more attention in recent years because of its simple structure， small mass， fast frequency response， large excitation bandwidth， adjustable excitation intensity， easy arrangement and no auxiliary control system. In this paper， high speed schlieren and laser dynamic pressure sensor are used to study the unsteady control of bow shock by counter jet of plasma synthetic jet. The results show that plasma synthetic jet has a strong flow control effect， whose control time is more than 600 μs. With the decrease of jet pressure， the controlled bow shock presents short penetration mode and long penetration mode changes. The debugging process of the two modes has a certain degree of drag reduction effect on the model.
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