Flow separation control nanosecond pulse driven on swept wing with DBD plasma actuators

• Published in: 中国航空学报：英文版 2015 (2), p.368-376
• Main Author: Zhao Guangyin Li Yinghong Liang Hua Han Menghu Wu Yun
• Format: Article
• Language: English
• Subjects: DBD; 分离控制; 后掠翼; 放电等离子体; 流驱动; 空气动力学性能; 纳秒脉冲; 驱动器
• ISSN: 1000-9361

A 15° swept wing with dielectric barrier discharge plasma actuator is designed. Experimental study of flow separation control with nanosecond pulsed plasma actuation is performed at flow velocity up to 40 m/s. The effects of the actuation frequency and voltage on the aerodynamic performance of the swept wing are evaluated by the balanced force and pressure measurements in the wind tunnel. At last, the performances on separation flow control of the three types of actuators with plane and saw-toothed exposed electrodes are compared. The optimal actua- tion frequency for the flow separation control on the swept wing is detected, namely the reduced frequency is 0.775, which is different from 2-D airfoil separation control. There exists a threshold voltage for the low swept wing flow control. Before the threshold voltage, as the actuation voltage increases, the control effects become better. The maximum lift is increased by 23.1% with the drag decreased by 22.4% at 14°, compared with the base line. However, the best effects are obtained on actuator with plane exposed electrode in the low-speed experiment and the abilities of saw-toothed actuators are expected to be verified under high-speed conditions.