气体引射对临近空间升力体飞行器气动力热影响

李俊红; 陈智; 靳旭红; 苗文博

doi:10.7638/kqdlxxb-2024.0008

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气体引射对临近空间升力体飞行器气动力热影响

研究论文 | 更新时间：2026-07-27

- 气体引射对临近空间升力体飞行器气动力热影响
- Effects of gas ejection on aerodynamic force and heating of near-space lifting vehicles
- 空气动力学学报 2024年42卷第8期页码：1-9
- 作者机构：
  
  1. 中国航天空气动力技术研究院,北京,100074
  2. 中国航天科技集团有限公司航天飞行器气动热防护实验室,北京,100048
- 作者简介：
  
  李俊红（1978—），女，河南卫辉人，研究员，研究方向：高温非平衡流动和稀薄流动数值模拟. E-mail：ljhong08@163.com
  靳旭红*，高级工程师，研究方向：稀薄流数值模拟. E-mail：jinxuhong08@163.com
- 基金信息：
- DOI：10.7638/kqdlxxb-2024.0008
  中图分类号： V211.3;TP6
- 纸质出版：2024
- 稿件说明：
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李俊红, 陈智, 靳旭红, 等. 气体引射对临近空间升力体飞行器气动力热影响[J]. 空气动力学学报, 2024, 42(8): 1−9.

LI Junhong, CHEN Zhi, JIN Xuhong, et al. Effects of gas ejection on aerodynamic force and heating of near-space lifting vehicles[J]. 2024, 42(8): 1-9.
李俊红, 陈智, 靳旭红, 等. 气体引射对临近空间升力体飞行器气动力热影响[J]. 空气动力学学报, 2024, 42(8): 1−9. DOI： 10.7638/kqdlxxb-2024.0008

LI Junhong, CHEN Zhi, JIN Xuhong, et al. Effects of gas ejection on aerodynamic force and heating of near-space lifting vehicles[J]. 2024, 42(8): 1-9. DOI： 10.7638/kqdlxxb-2024.0008.

摘要

针对临近空间高速飞行器的降热减阻需求，采用三维数值模拟手段研究了临近空间典型升力体飞行器气动力/热特性，分析了壁面气体质量引射对气动力/热特性的影响规律和作用机理。结果表明：壁面质量引射会略微增大激波脱体距离，对激波层和速度边界层有增厚作用，降低了边界层内的速度梯度，使得表面剪切力减小，从而具有较好的减阻效果。对于典型的升力体构型，在高度为60～70 km时，壁面质量引射减阻效率均不低于47.5%；在高度为80 km时，壁面质量引射减阻效率不低于10.2%；且壁面质量引射减阻效果随攻角增大而增强，随飞行高度升高而减弱。同时，壁面引射排出的低温气体对飞行器具有隔热保护作用，因此壁面质量引射能显著降低迎风面的热流，具有较好的降热效果。

Abstract

In order to meet the thermal and drag reduction requirements of high speed vehicles in near space

three-dimensional numerical simulation method was used to study the typical lift-body vehicle in near space. The aerodynamic thermal characteristics of the vehicle were analyzed

and the law and mechanism of mass ejection on the aerodynamic thermal characteristics were analyzed. The results demonstrate that wall mass ejection can slightly increase the detachment distance of the shock wave

thicken the shock wave layer and velocity boundary layer

and reduce the velocity gradient within the boundary layer

resulting in satisfactory drag reduction performance. For a typical lifting body configuration

wall mass ejection can reduce skin friction by more than 47.5% at flight altitudes ranging from 60 km to 70 km

while 10.2% at 80 km altitude. The drag reduction effect of wall mass ejection is enhanced with the increase of the attack angle

while weaken with the increment of flight altitude. Wall mass ejection not only thickens the temperature boundary layer but also provides thermal protection by ejecting low-temperature gas

which can significantly reduce the skin heat flux on the windward side.

关键词

Keywords

references

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