A segmentation calculation method for plasma collision frequency considering the electro-magnetic wave driving effect

作者：Liu Zhi-Wei; Bao Wei-Min; Li Xiao-Ping^*; Liu Dong-Lin

来源：Acta Physica Sinica, 2014, 63(23): 235201.

DOI：10.7498/aps.63.235201

• plasma sheath
• collision frequency
• empirical formula
• wave propagation

An empirical formula of collision frequency has been used for years to calculate the collision frequency of aircraft plasma sheath. But the formula ignores the influences of electron-electron impact, electron-ion impact, and electro-magnetic (EM) wave driving effect on the collision frequency. To remedy these deficiencies, this paper proposes a segmentation calculation method. Based on the plasma kinetic theory, combined with real flow conditions and synthesizing the influences of electron-electron impact, electron-ion impact and EM wave driving effect together, this method defines a new parameter, ionization-to-thermal motion ratio, to calculate the collision frequency segmentally. Theoretical analysis and simulation results demonstrate that this method is closer to the truth than the empirical formula when ITR is greater than 5.

• 出版日期2014-12-10
• 单位西安电子科技大学