疏导式热防护结构传热极限特性

艾邦成; 陈思员; 韩海涛; 胡龙飞; 鲁芹; 初敏; 邓代英; 俞继军

doi:10.7527/S1000-6893.2020.23989

航空学报 >

2021 , Vol. 42 >Issue 2: 623989 - 623989

DOI: https://doi.org/10.7527/S1000-6893.2020.23989

先进空间运输系统气动设计专栏

疏导式热防护结构传热极限特性

艾邦成 ,
陈思员 ,
韩海涛 ,
胡龙飞 ,
鲁芹 ,
初敏 ,
邓代英 ,
俞继军

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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

收稿日期: 2020-03-17

修回日期: 2020-04-09

网络出版日期: 2020-04-30

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Heat transfer limit characteristics of integrated dredging thermal protection structure

AI Bangcheng ,
CHEN Siyuan ,
HAN Haitao ,
HU Longfei ,
LU Qin ,
CHU Min ,
DENG Daiying ,
YU Jijun

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1. China Academy of Aerospace Aerodynamics, Beijing 100074, China;
2. Laboratory of Aero-Thermal Protection Technology for Aerospace Vehicles, China Aerospace Science and Technology Corporation, Beijing 100048, China

Received date: 2020-03-17

Revised date: 2020-04-09

Online published: 2020-04-30

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摘要

疏导式热防护结构通过高温热管将前缘驻点等高热流部位的热量快速疏导至大面积区域，可有效降低防热压力，实现新型飞行器前缘非烧蚀防热。然而，疏导结构内部液体工质回流受到飞行器加速过载的显著影响。通过理论评估与地面试验获得了典型过载条件下尖前缘热疏导结构的抗过载性能。结果表明，维持加热条件不变，当过载环境大于4g后，热疏导性能受到明显影响，但过载减小后疏导性能得以快速恢复。研究结论对于一体化疏导结构的设计具有重要的指导意义。

关键词： 疏导式热防护结构; 尖前缘; 高温; 热管; 过载

本文引用格式

艾邦成 , 陈思员 , 韩海涛 , 胡龙飞 , 鲁芹 , 初敏 , 邓代英 , 俞继军 . 疏导式热防护结构传热极限特性[J]. 航空学报, 2021 , 42(2) : 623989 -623989 . DOI: 10.7527/S1000-6893.2020.23989

Abstract

Through phase change and transportation of internal working medium, the integrated dredging thermal protection structure can efficiently deliver heat from stagnation point to other larger areas, achieving non-ablative heat shielding for sharp leading edges of advanced vehicles. Nevertheless, the back-flow of the liquid medium relies on the capillary force in the capillary structure, which will be affected by overloading during the flight. A ground test was carried out and the overload characteristic of the integrated dredging thermal protection structure was obtained. The isothermal condition was significantly influenced by overload larger than 4g, and the thermal dredging performance recovered immediately after the overload decreased. The study is instructional for the estimation and design of integrated dredging thermal protection structures of leading edges.

Key words： dredging thermal protection structure; sharp leading edge; high temperature; heat pipe; overloading

参考文献

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