物理化学模型对流场电磁波传播特性影响

doi:10.7527/S1000-6893.2022.27772

Abstract

Abstract:

Based on the steady state and dynamic plasma flow field data of hypersonic HTV-2 like vehicle calculated by considering different chemical reaction kinetic models and turbulence models， by using ADE-FDTD method， the difference of electromagnetic wave propagation characteristics of plasma flow field calculated by different physicochemical models is analyzed. In chemical models， the higher the temperature is， the stronger the chemical reaction will be， the higher the predicted electron number density will be， and the higher the plasma frequency and plasma collision frequency will be. As a result， the transmission coefficient of Park model， Gupta model and D&K model increases from small to large， and the attenuation coefficient is vice versa. In the turbulence model， the transmission coefficients of DDES model， DES model and Laminar model change from small to large due to the different electron number densities calculated by each model， while the attenuation coefficients is vice versa. By comparison， the chemical physics models suitable for the numerical simulation of hypersonic plasma flow field are the 7-component Gupta chemical reaction kinetic model and DDES model， which provide a theoretical basis for solving the black barrier problem and realizing reliable communication.

Key words: plasmas, blackout, ADE-FDTD, electromagnetic wave propagation, chemical reaction kinetic model, turbulence model

CLC Number:

V419

Deyang TIAN, Yi PING, Yesi CHEN, Weifang CHEN. Influence of physical and chemical models on electromagnetic wave propagation characteristics of flow field[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(S2): 214-224.

Figures/Tables 12

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速度/（km∙s^-1）	靶室压强/kPa	温度/K	Re/10⁶
4.25	4.2	298.3	3.49
5.07	4.2	298.3	4.17
6.0	4.2	298.3	4.93

模型	脱体距离/mm		误差/%
模型	试验	数值模拟	误差/%
4.25 km/s Laminar	0.581 0	0.562 1	3.25
4.25 km/s DES	0.581 0	0.568 9	2.08
4.25 km/s DDES	0.581 0	0.578 2	0.48
5.07 km/s Laminar	0.403 5	0.430 6	6.7
5.07 km/s DES	0.403 5	0.422 4	4.6
5.07 km/s DDES	0.403 5	0.415 8	3.0
6.0 km/s Laminar	0.501 2	0.465 7	7.1
6.0 km/s DES	0.501 2	0.471 8	5.9
6.0 km/s DDES	0.501 2	0.487 2	2.7

H/km	Ma	湍流模型
30	15	Laminar/DES/DDES
40	15	Laminar/DES/DDES
50	20	Laminar/DES/DDES

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Influence of physical and chemical models on electromagnetic wave propagation characteristics of flow field

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H/km	Ma	化学反应动力学模型	空气多组分模型
30	15	D&K/Gupta/Park	7
40	15	D&K/Gupta/Park	7
50	20	Gupta	7/11