纳秒脉冲等离子体激励器用于圆柱高速流动控制的数值模拟

doi:10.7527/S1000-6893.2013.0451

Abstract

Abstract:

A computational study is performed for nanosecond-pulse dielectric barrier discharge (NS-DBD) plasma actuator using for cylindrical high-speed flow control. First, the flow field characteristic of a single NS-DBD plasma actuator in quiescent air is studied. The result shows that in the region of dielectric barrier discharge, there is a rapid injection of energy. At 5 μs after the discharge, a hot spot is formed at the downstream edge of the upper electrode. The maxima temperature of the hot spot reaches up to 900 K. The fast heating effect will result in a strong pressure perturbation and form an asymmetric perturbation wave spreading at the speed of sound. On this basis, the numerical simulation of NS-DBD plasma actuator disposed on the cylinder in the free stream Ma_∞ = 4.6 is presented in this paper. Studies have shown that as the compression wave travels upstream, it interacts with the bow-shock and momentarily increases the bow-shock standing distance and weakens the shock strength, thus resulting in a drag decrease by as much as 13%.

Key words: nanosecond pulse, dielectric barrier discharge, shock, flow control, numerical simulation

CLC Number:

V19
O539

NI Fangyuan, SHI Zhiwei, DU Hai. Numerical Simulation of Nanosecond Pulsed Plasma Actuator for Cylindrical High-speed Flow Control[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(3): 657-665.

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Numerical Simulation of Nanosecond Pulsed Plasma Actuator for Cylindrical High-speed Flow Control

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