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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