Effects of chemical non-equilibrium models on stability analysis of blunt wedge boundary layer with high enthalpy

LI Chenhui; WAN Bingbing; TU Guohua; HU Weibo; Chen Jianqiang; JIANG Chongwen

doi:10.7638/kqdlxxb-2024.0002

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Effects of chemical non-equilibrium models on stability analysis of blunt wedge boundary layer with high enthalpy

更新时间：2026-05-28

- Effects of chemical non-equilibrium models on stability analysis of blunt wedge boundary layer with high enthalpy
- Vol. 42, Issue 12, Pages: 12-24(2024)
- 作者机构：
  
  1. 北京航空航天大学航空科学与工程学院,北京,100191
  2. 空天飞行空气动力科学与技术全国重点实验室,绵阳,621000
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2024.0002
  CLC： O357.4
- Published：2024
- 稿件说明：
移动端阅览
李晨辉, 万兵兵, 涂国华, 等. 化学非平衡模型对高焓钝楔边界层稳定性分析的影响[J]. 空气动力学学报, 2024, 42(12): 12−24.

LI Chenhui, WAN Bingbing, TU Guohua, et al. Effects of chemical non-equilibrium models on stability analysis of blunt wedge boundary layer with high enthalpy[J]. 2024, 42(12): 12-24.
李晨辉, 万兵兵, 涂国华, 等. 化学非平衡模型对高焓钝楔边界层稳定性分析的影响[J]. 空气动力学学报, 2024, 42(12): 12−24. DOI： 10.7638/kqdlxxb-2024.0002

LI Chenhui, WAN Bingbing, TU Guohua, et al. Effects of chemical non-equilibrium models on stability analysis of blunt wedge boundary layer with high enthalpy[J]. 2024, 42(12): 12-24. DOI： 10.7638/kqdlxxb-2024.0002.

摘要

对于高马赫数飞行器，其绕流场温度会急剧升高引发高温化学非平衡效应，进而影响边界层转捩过程。针对这一问题，一般需在基本流计算和稳定性分析中引入反映复杂物理化学过程的计算模型，但这制约了计算效率，且不同模型可能会得到不同的稳定性分析结果。为了进一步研究一些工程常用模型对计算的影响，本文发展了化学非平衡流动的线性稳定性分析方法，考察了化学非平衡效应对高焓钝楔边界层稳定性的影响途径，分析了不同热力学、输运系数和化学反应等物理化学模型造成的稳定性分析结果差异。研究表明：化学非平衡效应主要通过改变基本流影响模态

值，转捩预测时可以仅在基本流求解中考虑化学非平衡效应以提高计算效率；物理化学模型对第二模态的影响较小，对于由第二模态主导的转捩过程，预测结果对化学非平衡流动中物理化学模型的选取不敏感，但在第三模态对

值贡献较大时，模型选取对转捩预测结果的影响则无法忽略。

Abstract

Boundary layer transition has a significant impact in the design of flight vehicles. At high Mach numbers

the temperature in the boundary layer rises rapidly

leading to a series of high-temperature effects

which affect the boundary layer transition process. Some physicochemical models are often introduced to reflect these effects in the numerical simulations

which greatly increases the computational cost. In the meantime

different models may give different results in the flow stability analysis. Currently

relevant research in this field is not sufficient

and

the effects of typical physicochemical models have not been considered. In the present study

the linear stability theory (LST) for chemical non-equilibrium flow was developed

and the influence of chemical non-equilibrium effects on the flow stability of blunt wedge boundary layers was investigated. The differences in the boundary layer stability calculation results caused by physicochemical models such as the thermal models

the transport models

and the chemical models were analyzed. The results show that the chemical non-equilibrium effects mainly affect the

factors by changing the basic flow

thus

they can be considered merely in the basic flow calculation in order to improve the computational efficiency. The transition prediction result is insensitive to the selection of physicochemical models for second-mode dominant transition in the chemical non-equilibrium flow. However

when the contribution of the third mode to the

values is large

the influence of physicochemical model on the transition prediction cannot be ignored.

关键词

Keywords

references

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