ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Numerical Simulation and Experimental Validation of Pulsed Nanosecond Plasma Aerodynamic Actuation in Air Under Atmospheric Pressure
Received date: 2013-01-17
Revised date: 2013-03-12
Online published: 2013-03-21
Supported by
National Natural Science Foundation of China (50906100,51007095);High School National Foundation for Excellent Doctorial Dissertation (201172)
This paper presents a plasma kinetic model considering 15 species and 42 reactions. Discharge characteristics in timescale of ns and fluid response in μs, ms and s are investigated using a timestep adjusting technique. The results agree with voltage-current characteristics, intensified charge-coupled device (ICCD) and particle image velocimetry (PIV) experiments. Simulation results show that nanosecond discharge will lead to a rise of temperature at the rate of 1.8×1010 K/s, with the hottest heating spot located at the back end of the upper electrode. The fast heating effect will result in a strong pressure perturbation and form an asymmetric perturbation wave spreading at the speed of sound. The strong wave will soon decay into a weak perturbation. The high temperature resulting from the pressure perturbation wave will induce vortexes in the local flow field with the highest velocity of 0.3 m/s in the vortexes. With repetitive nanosecond actuation being applied, the fluid will flow vertically first and then form a stable jet pointing to the top right direction due to the coupling effect of heating convection and induced vortexes, which is validated by experiments.
ZHU Yifei, WU Yun, CUI Wei, LI Yinghong, JIA Min. Numerical Simulation and Experimental Validation of Pulsed Nanosecond Plasma Aerodynamic Actuation in Air Under Atmospheric Pressure[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(9): 2081-2091. DOI: 10.7527/S1000-6893.2013.0164
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