Experiment on Improving Aerodynamic Performance of NACA 0015 Airfoil by RF Dielectric Barrier Discharge

被引：0

作者：

Xie L.-K. ^{[1
]}

Liang H. ^{[1
]}

Zhao G.-Y. ^{[1
]}

Wei B. ^{[1
]}

Su Z. ^{[1
]}

Chen J. ^{[1
]}

Tian M. ^{[1
]}

机构：

[1] Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi'an

来源：

Tuijin Jishu/Journal of Propulsion Technology | 2020年 / 41卷 / 02期

关键词：

Airfoil; Dielectric barrier discharge; Duty cycle; Plasma flow control; Radio frequency;

D O I：

10.13675/j.cnki.tjjs.190010

中图分类号：

学科分类号：

摘要：

Dielectric barrier discharge (DBD) is uniform, stable, and easy to lay, and is the most common excitation method in wing/airfoil plasma flow control (PFC). RF dielectric barrier discharge excitation possesses the abilities of high frequency and large discharge power, and can produce obvious heating in the flow field, which has great application potential. RF power was supplied to drive DBD actuator to generate plasma. The body force, thermal and induced flow filed characteristics of discharge were analyzed and the experiment of RF dielectric barrier discharge for improving the aerodynamic performance of NACA 0015 airfoil was carried out. The influence law of duty cycle, modulation frequency, carrier frequency, and power supply on flow control effect was studied. The results show that the body force effect of RF plasma excitation increases with the increase of excitation voltage, and the heat generated by RF plasma excitation is transmitted into the induced flow field to accelerate the flow field. When the inflow velocity is 20m/s and Reynolds number is 3.36×105, the application of RF plasma actuation at the leading edge of the airfoil can effectively delay the 1° of the critical stall angle of attack and increase the maximum lift coefficient by 6.43%. There is still a flow control effect under the over-stall angle of attack, so that the lift coefficient is slowed down. The greater the modulation frequency, the better the control effect. There are optimal duty cycle, carrier frequency and power. The duty cycle has the most significant influence on the control effect of flow field. The optimal duty cycle, carrier frequency and power are 20%, 460kHz and 50W, respectively. RF plasma excitation improves stall flow field by body force effect, thermal effect, and induced wall jet, which greatly improves aerodynamic performance of NACA 0015 airfoil and effectively controls flow separation. © 2020, Editorial Department of Journal of Propulsion Technology. All right reserved.

引用

页码：294 / 304

页数：10

共 12 条

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