• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (18): 157-164.doi: 10.3901/JME.2019.18.157

• 可再生能源与工程热物理 • 上一篇    


黄祯君1,2, 张涛2, 王杰1   

  1. 1. 四川大学制造科学与工程学院 成都 610065;
    2. 中国空气动力研究与发展中心超高速空气动力研究所 绵阳 621000
  • 收稿日期:2018-11-04 修回日期:2019-05-13 发布日期:2020-01-07
  • 作者简介:黄祯君,男,1990年出生,硕士研究生。主要研究方向为电弧加热设备研制。E-mail:okingoking@126.com;张涛,男,1981年出生,博士。主要研究方向为地面防热试验技术。E-mail:zt19181918@163.com;王杰,男,1964年出生,教授,博士研究生导师。主要研究方向为计算机辅助设计与制造及计算机集成制造系统。E-mail:wangjie@scu.edu.cn

Cooling Structural Design and Thermodynamic Analysis of Semi-elliptic Nozzle under High Enthalpy and High Heatflux Conditions

HUANG Zhenjun1,2, ZHANG Tao2, WANG Jie1   

  1. 1. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065;
    2. Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000
  • Received:2018-11-04 Revised:2019-05-13 Published:2020-01-07

摘要: 电弧风洞是开展高超声速飞行器地面防热试验的重要设备,在开展大面积防热试验以及材料烧蚀考核试验时,通常配置半椭圆喷管,现有半椭圆喷管使用功率不高,不能满足高焓高热流条件下试验需求。选择一组接近电弧风洞试验设备功率上限的工况作为输入条件,计算半椭圆喷管内壁面热流分布,计算结果显示最高热流超过30 MW/m2。分析传统夹层焊接冷却结构缺点,设计圆孔冷却通道形式的半椭圆喷管,并开展所设计半椭圆喷管热力分析。制造圆孔冷却通道形式半椭圆喷管并多次开展长时间高焓值高热流试验。结果表明:所研制半椭圆喷管试验后内壁未出现烧损,解决了高焓高热流条件下喷管设计中强度与换热对壁厚要求矛盾的问题,同时大大降低了加工成本和加工周期,并保证了设备长时间安全稳定运行。所研制半椭圆喷管对保障国内高超声速飞行器及材料烧蚀考核地面试验具有重要意义。

关键词: 高焓, 高热流, 半椭圆喷管, 结构设计, 热力分析

Abstract: The arc-heated wind tunnel is an important equipment for carrying out the ground heat protection test of hypersonic vehicles. When conducting large-area heat-proof tests and material ablation tests, semi-elliptical nozzle is usually arranged. The existing semi-elliptical nozzle can be used when the power is low, and can't meet the heat test when the enthalpy and the heatflux needed is high. A set of operating conditions, which close to the upper limit power of the arc-heated wind tunnel, is selected as the input parameter to compute the distribution heatflux of the inner wall be-longed to semi-elliptical nozzle. The shortcomings of the traditional structure are analyzed, and then a new form is developed. The new semi-elliptical nozzle is manufactured, and a series of experiments about the nozzle are carried out. Results of experiment show that the inner wall of semi-elliptical nozzle is intact and without erosion. The new form of cooling structure can be used to solve the contradiction between wall thickness and stringency in the architectural design under high enthalpy and high heatflux condition. The processing cost and processing cycle of the new nozzle are greatly reduced, and the new nozzle has ensured the safe and stable operation of the equipment for a long time.

Key words: high enthalpy, high heatflux, semi-elliptical nozzle, architectural design, thermodynamic analysis