模型烧蚀对尾迹电子特性影响的计算和实验研究

 基于气动物理研究的需要，针对高焓风洞的来流特点，采用计算和实验相结合的方法研究聚丙烯烧蚀对尾迹电子密度的影响。结果表明：计算结果可以有效模拟实验状态，电子密度的模拟精度有很大提高，误差在一个量级内；聚丙烯烧蚀可以降低尾迹的电子密度，但幅度不大，在2倍左右，其与选择模型材料的催化特性降低幅度相当；对电弧风洞的成功改进和非稀薄流静电探针诊断技术的应用，是尾迹电子密度测试的前提保障。

Computational and Experimental Studies of Ablation Effect on Electronic Characteristics in Vehicle Wake

This study was implemented for satisfying the demand of aerodynamic physics applications.On incoming flow conditions of a high-enthalpy arc wind tunnel,the polypropylene ablation effect on electron density in a vehicle wake was investigated both computationally and experimentally.Numerical results agree well with the relevant experimental ones,and the numerical precision of electron density is largely improved with no more than one magnitude error.The polypropylene ablation can slightly decrease the wake electron density twice or so,and this decrease in electron density is similar to that caused by changing the catalyzed property of experimental model material.Moreover,for the sake of wake electron density measurement,the arc wind tunnel was reconstructed,and a non-rarefied static probe diagnosis technique was also employed.