Liu Shimin, Liang Hua, Zong Haohua, Yang Hesen, Chen Jie, Zhang Dongsheng, Su Zhi, Kong Weiliang
National Key Lab of Aerospace Power System and Plasma Technology, Air Force Engineering University, Xi'an, People's Republic of China.
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, People's Republic of China.
Sci Prog. 2023 Oct-Dec;106(4):368504231216832. doi: 10.1177/00368504231216832.
Adverse pressure gradients can cause severe flow separation within typical S-shaped inlets. This results in a total pressure distortion at the aerodynamic interface plane (AIP). The expansive bending pipe, where flow separation also occurs due to the adverse pressure gradient, is the basis for investigations into S-shaped inlets. In this study, surface dielectric barrier discharge (SDBD) plasma actuators are used to moderate the total pressure distortion in the AIP of an expansive bending pipe under a 10 m/s incoming flow. Also, the influences of actuation voltage amplitude and pulsed frequency on the total pressure distortion of the AIP are investigated under two plasma actuation modes, nanosecond pulsed SDBD and alternating current (AC) SDBD. Under optimal actuation parameters, the nanosecond pulsed SDBD and the AC-SDBD can reduce the distortion index by 14.93% and 32.22%, respectively. The results demonstrate the effectiveness of SDBD plasma actuators in suppressing flow separation within expansive bending pipes.
不利的压力梯度会在典型的S形进气道内导致严重的气流分离。这会在气动界面平面（AIP）产生总压畸变。膨胀弯管由于不利的压力梯度也会发生气流分离，是研究S形进气道的基础。在本研究中，使用表面介质阻挡放电（SDBD）等离子体致动器来减轻在10 m/s来流条件下膨胀弯管气动界面平面的总压畸变。此外，在纳秒脉冲SDBD和交流电（AC）SDBD这两种等离子体致动模式下，研究了致动电压幅值和脉冲频率对气动界面平面总压畸变的影响。在最佳致动参数下，纳秒脉冲SDBD和交流SDBD可分别将畸变指数降低14.93%和32.22%。结果证明了SDBD等离子体致动器在抑制膨胀弯管内气流分离方面的有效性。
