Study on supersonic turbulence plate ablation flow field in arc heater
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摘要: 电弧加热器超声速湍流平板烧蚀试验技术是研究防热材料烧蚀特性的重要手段。为研究超声速湍流平板烧蚀过程中流场变化情况，采用数值求解二维N-S方程的方法进行试验流场模拟。从模拟结果看，未烧蚀模型外形流场模拟得到的模型表面参数结果与试验结果吻合很好。然后对烧蚀过程中的模型外形进行了流场模拟，并与试验流场进行对比，根据模拟结果分析了试验过程中模型表面压力和热流密度分布的变化。根据分析可知，如果平板模型烧蚀量最大的位置在初始高热流区内，可以采用该烧蚀量计算烧蚀速率。Abstract: The supersonic turbulent plate ablation test technology is an important method in arc-heater to study the ablation characteristic of thermal protection materials. In order to study the change of the flow field during the supersonic turbulence plate ablation, a numerical simulation method based on N-S equation is adopted. The simulation results of the initial model surface parameters are in good agreement with the experimental results. Then, the flow field simulation about the model contour is carried out in the experimental process, which is compared with the experimental flow field. The changes of surface pressure and heat flux on the model are analyzed. According to the analysis, if the maximum ablation position is in the high heat flux region of the initial model, the ablation rate can be calculated by using the maximum ablation amount.
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Keywords:
- turbulence plate /
- ablation /
- flow field /
- numerical simulation
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