Calculation of Thermal Response of Ablator Under Arcjet Flow Condition
Calculation of Thermal Response of Ablator Under Arcjet Flow Condition
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DOI：
10.2514/1.25499
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发表时间：
2007-04
影响因子：
2.1
通讯作者：
Toshiyuki Suzuki;T. Sakai;Tetsuya Yamada
中科院分区：
文献类型：
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作者：
Toshiyuki Suzuki;T. Sakai;Tetsuya Yamada
开发了一种集成计算方法来计算电弧射流条件下烧蚀体的热响应。该方法通过对电弧喷射风洞内的流动进行充分的理论计算，对试验段的电弧喷射自由流状况进行了评价。使用如此评估的 arcjet 自由流条件，通过松散耦合冲击层计算流体动力学代码和二维版本的烧蚀代码来计算烧蚀器的热响应。该方法应用于1 MW arcjet风洞中一种工况下的加热试验。研究了烧蚀表面催化条件的影响以及氮化反应和表面粗糙度对烧蚀器热响应的影响。计算和测量之间烧蚀表面温度分布的比较表明，测量的温度分布可以在表面的低催化效率下再现。研究发现，氮化反应适度提高了表面温度，并且在目前的操作条件下，表面粗糙度的影响很小。
An integrated computational method is developed to calculate thermal response of ablator under an arcjet flow condition. In the method, the arcjet freestream condition in the test section is evaluated by calculating the flows in the arcjet wind tunnel fully theoretically. The thermal response of the ablator is calculated by loosely coupling the shock layer computational fluid dynamics code and the 2-D version of ablation code using the arcjet freestream condition so evaluated. The method is applied to the heating tests conducted in the 1 MW arcjet wind tunnel for one operating condition. The influence of catalytic conditions of ablating surface and the effect of nitridation reaction and surface roughness on the thermal response of the ablator are investigated. Comparison of the temperature profile at the ablating surface between calculation and measurement suggests that the measured temperature profile can be reproduced with a low catalytic efficiency of the surface. It is found that the nitridation reaction increase the surface temperature moderately, and that the effect of the roughness on the surface were small for the present operating condition.