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利用合成射流对细长旋成体大攻角非对称涡控制进行了研究,基于合成射流激励器设计了一频率高达1kHz的非定常小扰动控制机构,并将其成功应用于大攻角非对称涡主动流动控制。应用天平测力和七孔探针流场测试技术,研究了合成射流非定常小扰动电压和频率对非对称涡的控制特性和规律。结果表明,采用合成射流能够完全消除背涡的非对称性,扰动频率是影响非对称涡控制的一个关键参数,高频扰动下模型背风区非对称涡结构趋于无控制流态。且文中结果发现,当攻角α=57.5°、非定常小扰动频率fs=150Hz时,即可将非对称涡完全控制成为对称涡。
The asymmetric eddy control of slender body at high angle of attack using synthetic jet was studied. A small unsteady disturbance control mechanism with a frequency up to 1 kHz was designed based on the synthetic jet actuator. The unsymmetrical vortex control mechanism was successfully applied to asymmetric eddy at large angle of attack. Active flow control. By using balance force measurement and flow field test of seven-hole probe, the control characteristics and regularities of unsteady voltage and frequency of synthetic jet on asymmetric vortex are studied. The results show that asymmetric vortex structure can be completely eliminated by using synthetic jet. The perturbation frequency is a key parameter that affects asymmetric vortex control. The asymmetric vortex structure in the leeward area tends to uncontrolled flow under high frequency disturbance. In the paper, we find that when the angle of attack α = 57.5 ° and the unsteady small perturbation frequency fs = 150Hz, the asymmetric vortex can be completely controlled as the symmetric vortex.