| 摘要: |
| 设计了一种用于高超声速流动控制的等离子体直流电弧激励器，运用多物理场有限元方法对激励器的工作特性进行了数值模拟，得到了激励器准确热源分布和不同工况下电势、温度等的分布情况。其中，表面电弧激励器在电流7 A、阴阳极距离3.5 mm时在阴极表面最高能得到2.690 5×1010 W/m3的热源值。运用有限体积方法对激励器的斜坡减阻效果进行了数值模拟，得到马赫数为7时总阻力系数最多减小32%的结论。 |
| 关键词: 等离子体减阻 电弧放电 高超声速流动控制 数值模拟 |
| DOI： |
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| 基金项目: |
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| Simulation Study on Characteristics of a Plasma Arc Actuator and the Drag Reduction Effect |
| YUAN Ye,ZHAO Qing,CHEN Lunjiang,BO Yong |
| (University of Electronic Science and Technology of China, Chengdu 611731, China) |
| Abstract: |
| A plasma arc actuator was designed, and the working characteristics of the actuator were numerically simulated by using a finite element method of multiphysics. We obtained the accurate heat source distribution, and the distribution of the electric potential, temperature under different working conditions. The maximum heat source value of 2.690 5×1010 W/m3 can be obtained on the cathode surface of the surface arc actuator when the current is 7 A and the distance between anode and cathode is 3.5 mm. The finite volume method was used to numerically simulate the drag reduction effect of the actuator on a wedge, and it was found that the drag coefficient at Mach number 7 decreased by up to 32%. |
| Key words: Plasma drag reduction Arc discharge Hypersonic flow control Numerical simulation |