Numerical simulation of characteristic of hypersonic ablation flow field containing alkali-metal impurities

CHAI Dong; FANG Yang-wang; TONG Zhong-xiang; GAO Xiang

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Numerical simulation of characteristic of hypersonic ablation flow field containing alkali-metal impurities

更新时间：2026-07-07

- Numerical simulation of characteristic of hypersonic ablation flow field containing alkali-metal impurities
- Vol. 28, Issue 9, (2013)
- 作者机构：
  
  空军工程大学航空航天工程学院,西安,710038
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2013
- 稿件说明：
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CHAI Dong, FANG Yang-wang, TONG Zhong-xiang, et al. Numerical simulation of characteristic of hypersonic ablation flow field containing alkali-metal impurities[J]. 2013, 28(9).
DOI：

CHAI Dong, FANG Yang-wang, TONG Zhong-xiang, et al. Numerical simulation of characteristic of hypersonic ablation flow field containing alkali-metal impurities[J]. 2013, 28(9). DOI：

摘要

针对高超声速飞行器的烧蚀现象

采用Newton迭代的空间推进方法

数值求解化学非平衡的抛物化Navier-Stokes(PNS)方程.以黏胶基碳布-氨酚醛树脂为烧蚀材料

建立了含碱金属杂质的18组分33反应的化学反应模型

计算了小钝锥体的壁面温度

并和现有文献结果进行对比验证.在此基础上

对含碱金属杂质的高超声速烧蚀流场进行了模拟

深入分析了含碱金属杂质的烧蚀反应对流场温度、压力和电子数密度的影响.结果表明:烧蚀反应使得流场温度较非烧蚀情况增加了10%~15%;考虑碱金属杂质Na后

流场电子数密度增大了1~2个数量级.

Abstract

As for the ablation of hypersonic vehicles

the parabolized Navier-Stokes(PNS) equations of chemical non-equilibrium were calculated numerically based on a kind of Newton-type iteration method.The chemical model of 18 species 33 reactions containing alkali-metal impurities was established on the basis of a carbon-phenolic ablative material.Firstly

the wall temperature of small blunt cone was computed and the numerical results were validated by comparing with those in a reference.Then

the hypersonic ablation flow field containing alkali-metal impurities were simulated and the effects of ablation reactions on the flow parameters were deeply analyzed.The results show that compared with non-ablation condition

the temperature of flow field increases by 10% to 15% in ablation reactions.And the electron number densities increase by 1 to 2 orders of magnitude after taking alkali-metal Na into consideration.

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