物理化学模型对流场电磁波传播特性影响
收稿日期: 2022-07-06
修回日期: 2022-07-27
录用日期: 2022-08-23
网络出版日期: 2022-09-13
基金资助
国家自然科学基金(U20B2007)
Influence of physical and chemical models on electromagnetic wave propagation characteristics of flow field
Received date: 2022-07-06
Revised date: 2022-07-27
Accepted date: 2022-08-23
Online published: 2022-09-13
Supported by
National Natural Science Foundation of China(U20B2007)
基于考虑不同化学反应动力学模型和湍流模型计算得到的高超声速类HTV-2飞行器稳态及动态等离子体流场数据，应用ADE-FDTD方法研究了类HTV-2等离子体流动的电磁传播特性。分析了由不同物理化学模型计算得到的等离子体流场的电磁波传播特性差异，化学模型中由于各模型预测温度不同，温度越高使得化学反应更为剧烈，预测的电子数密度越高，因此等离子体频率和等离子体碰撞频率越高，从而导致Park模型、Gupta及D&K模型的透射系数依序从小变大，衰减系数反之。湍流模型中同样由于各模型计算的电子数密度不同，从而导致DDES模型、DES模型及Laminar模型的透射系数由小变大，衰减系数反之。通过比较选出了适用于高超声速等离子体流场数值模拟的化学物理模型，即7组元Gupta化学反应动力学模型与DDES模型，为解决黑障问题，实现可靠通信提供了理论依据。
田得阳 , 平熠 , 陈烨斯 , 陈伟芳 . 物理化学模型对流场电磁波传播特性影响[J]. 航空学报, 2022 , 43(S2) : 214 -224 . DOI: 10.7527/S1000-6893.2022.27772
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.
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