TY - GEN
T1 - Discharge process and gas heating effect in nanosecond-pulse-driven plasma actuator
AU - Sato, Shintaro
AU - Takahashi, Masayuki
AU - Ohnishi, Naofumi
N1 - Funding Information:
The computations in this work were performed on Silicon Graphics International (SGI) Altix UV1000 at Advanced Fluid Information Research Center, Institute of Fluid Science, Tohoku University and FU-JITSU Supercomputer PRIMEHPC FX100 at Japan Aerospace Exploration Agency (JAXA). This work was partially supported by JSPS KAKENHI Grant Number 18J11195.
Publisher Copyright:
© 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
PY - 2019
Y1 - 2019
N2 - A discharge-fluid coupling simulation was carried out in order to investigate the effect of the pulse polarity on discharge process and flow structure induced by a nanosecond-pulse-driven plasma actuator. The result of the discharge simulation shows that the pulse polarity has an impact on the discharge structure and current waveform. The total amount of the deposited energy to the gas is larger in the positive pulse case than in the negative pulse case when the same peak amplitude pulses are applied. The pulse polarity also affects the structure of the induced shock wave; the shock wave consists of planar and circular parts for the positive pulse case, while no planar part is obtained for the negative pulse case. The difference of the shock wave structure is caused by the difference of the discharge structure. Our result suggests that the positive pulse is preferable to heat large area, while the negative pulse is superior in view of the efficient generation of the strong shock wave. The difference of the shock wave structure would affect the performance of the flow separation control.
AB - A discharge-fluid coupling simulation was carried out in order to investigate the effect of the pulse polarity on discharge process and flow structure induced by a nanosecond-pulse-driven plasma actuator. The result of the discharge simulation shows that the pulse polarity has an impact on the discharge structure and current waveform. The total amount of the deposited energy to the gas is larger in the positive pulse case than in the negative pulse case when the same peak amplitude pulses are applied. The pulse polarity also affects the structure of the induced shock wave; the shock wave consists of planar and circular parts for the positive pulse case, while no planar part is obtained for the negative pulse case. The difference of the shock wave structure is caused by the difference of the discharge structure. Our result suggests that the positive pulse is preferable to heat large area, while the negative pulse is superior in view of the efficient generation of the strong shock wave. The difference of the shock wave structure would affect the performance of the flow separation control.
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U2 - 10.2514/6.2019-1001
DO - 10.2514/6.2019-1001
M3 - Conference contribution
AN - SCOPUS:85083941218
SN - 9781624105784
T3 - AIAA Scitech 2019 Forum
BT - AIAA Scitech 2019 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2019
Y2 - 7 January 2019 through 11 January 2019
ER -