采用液氮喷雾技术的低温环路结构模拟系统研究

张蓓乐 1; 陈小砖 1; 薛绒 2; 刘秀芳 2

doi:10.7652/xjtuxb201905015

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采用液氮喷雾技术的低温环路结构模拟系统研究

更新时间：2025-07-09

- 采用液氮喷雾技术的低温环路结构模拟系统研究
- Study on the Low-Temperature Air Loop Simulation System Based on Liquid Nitrogen Spray Technology
- 西安交通大学学报 2019年53卷第5期页码：109-114
- 作者机构：
  
  河南理工大学机械与动力工程学院,河南,焦作,454000
- 作者简介：
- 基金信息：
  
  : 2018-11-02。作者简介: 张蓓乐(1993—),男,硕士生;刘秀芳(通信作者),女,副教授,硕士生导师。基金项目: 国家自然科学基金资助项目(51406160);中国博士后科学基金资助项目(2014M560773)
- DOI：10.7652/xjtuxb201905015
  中图分类号： TB69
- 网络首发：2019-05-10，
  
  纸质出版：2019
- 稿件说明：
移动端阅览
张蓓乐 1, 陈小砖 1, 薛绒 2, 等. 采用液氮喷雾技术的低温环路结构模拟系统研究[J]. 西安交通大学学报, 2019,53(5):109-114.

Study on the Low-Temperature Air Loop Simulation System Based on Liquid Nitrogen Spray Technology[J]. 2019, 53(5): 109-114.
张蓓乐 1, 陈小砖 1, 薛绒 2, 等. 采用液氮喷雾技术的低温环路结构模拟系统研究[J]. 西安交通大学学报, 2019,53(5):109-114. DOI： 10.7652/xjtuxb201905015.

Study on the Low-Temperature Air Loop Simulation System Based on Liquid Nitrogen Spray Technology[J]. 2019, 53(5): 109-114. DOI： 10.7652/xjtuxb201905015.

摘要

为进行座舱盖高空低温环境飞行疲劳试验考核

设计并搭建了采用液氮喷雾技术的小型环路结构低温环境模拟测试试验台

开展了风速以及喷射流量对系统降温速率影响的特性研究。试验测试了在液氮喷雾流量为37.2、42.4和49.3 kg/h

系统风速为2.21、4.53和6.77 m/s时

工作段温度从21 ℃降至-30 ℃时各测试面的降温特性

验证了运用液氮喷雾技术快速降温的可行性。结果表明:在相同喷雾流量下

风速越大

环路的降温速率越慢

测试面的温度均匀性越好; 在相同风速下

喷雾流量越大

降温速率越快

测试面的温度均匀性越差。液氮喷雾降温能够满足座舱盖疲劳测试的低温环境要求

工作段温度场均匀性良好。本文研究可为低温环境模拟系统和大空间液氮喷雾冷却系统的设计提供参考。

Abstract

To examine the canopy fatigue during low-temperature flights

a small air loop canopy fatigue test-rig using liquid nitrogen spray cooling technology was designed and developed to investigate the effects of air speed and spray flow rate on the cooling rate of the system. In the experiment

as the liquid nitrogen spray flow rates were 37.2

42.4 and 49.3 kg/h and the air speeds were 2.21

4.53 and 6.77 m/s

the cooling performance of each test section was tested when the system temperature decreased from 21 ℃ to -30 ℃. The results show that the high flow rate enables the cooling rate to slow down and enhances the temperature uniformity under the same injection pressure and mass flow rate. As the flow rate is constant

with the cooling rate increasing

the temperature non-uniformity of each test face is obvious when the mass flow rate increases. The liquid nitrogen system can provide a low-temperature environment and a uniformed temperature field for simulation of canopy fatigue test. The present work could be a guidance for the design of low-temperature environment simulation and large-space liquid nitrogen cooling systems.

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