应用等离子体激励器抑制串列双圆柱噪声的数值仿真研究  

Numerical Simulation Study on Plasma Noise Control of Cylinders in a Tandem Configuration

作　　者：施傲 曹琦[1] 燕群[1] 刘兴强[1] 赵越 Shi Ao;Cao Qi;Yan Qun;Liu Xingqiang;Zhao Yue(Aircraft Strength Research Institute,Xi’an 710065,China)

机构地区：[1]中国飞机强度研究所,陕西西安710065

出　　处：《航空科学技术》2023年第4期21-30,共10页Aeronautical Science & Technology

摘　　要：针对等离子体激励下的串列双圆柱绕流噪声抑制问题,通过将等离子体体积力模型、脱落涡模拟、声比拟理论等技术相结合的数值模拟方法,研究不同来流速度下等离子体激励器安装位置对双圆柱分离流形态控制与远场噪声抑制效果的影响。结果表明,当所施加的等离子体激励位于圆柱流动分离点附近时,控制措施可有效减小分离涡尺度和湍流强度,并显著降低远场监测点的总声压级。随着来流速度增大,等离子体激励器的降噪效果增强,同时最优安装位置前移。当来流速度达到55m/s时获得最优降噪效果,其远场监测点声压级频谱峰值和总声压级分别降低11.5dB和8.3dB。而随着来流速度的进一步增大,等离子体激励器的降噪效果逐渐减弱。所得结果对于等离子体流动控制抑制串列圆柱噪声的实际应用有一定指导意义。Focusing on tandem cylinder noise suppression via plasma actuator,the influence of flow velocity and plasma applying positions on flow separation control and far field noise reduction is studied by combining plasma body-force model,detached eddy simulation and acoustic analogy theory.The results show that when plasma actuator is applied near the separation position of front cylinder,the turbulence intensity and far-field total sound pressure level can be effectively reduced.As flow velocity increases,the effect of plasma noise control is enhanced,and the optimal position of plasma actuator moves forward.When the flow velocity comes to 55m/s,a significant noise suppression is observed.The tonal peak of sound pressure level spectra and total sound pressure level decreases by 11.5dB and 8.3dB,respectively.With further increase of flow velocity,the effect of plasma noise control becomes weakened.

关 键 词：串列圆柱 等离子体 主动流动控制 数值模拟 气动噪声 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]