低温风洞绝热结构设计与性能分析

宋远佳; 廖达雄; 陈万华; 赖欢; 侯予

doi:10.11729/syltlx20200137

低温风洞绝热结构设计与性能分析

doi: 10.11729/syltlx20200137

宋远佳^{1, 2,},
廖达雄¹,
陈万华^1, ,,
赖欢¹,
侯予²

1.
中国空气动力研究与发展中心设备设计与测试技术研究所，四川绵阳　621000
2.
西安交通大学能源与动力工程学院，西安　710049

基金项目: 国家自然科学基金（51806234）

详细信息

作者简介:
宋远佳：（1983-），男，四川犍为人，副研究员。研究方向：风洞结构设计。通信地址：四川省绵阳市二环路南段6号12信箱2分箱（621000）。E-mail：songyuanjia@163.com

通讯作者:
E-mail：barener@126.com

中图分类号: V211
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- 文章访问数: 584
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- 被引次数: 0
出版历程
- 收稿日期: 2020-11-02
- 修回日期: 2021-01-13
- 网络出版日期: 2021-09-29
- 刊出日期: 2021-11-05

Design and property analysis on insulation structure of cryogenic wind tunnel

SONG Yuanjia^{1, 2
,},
LIAO Daxiong¹,
CHEN Wanhua^{1
, ,},
LAI Huan¹,
HOU Yu²

1.
Facility Design and Instrumentation Institute of China Aerodynamics Research and Development Center, Mianyang Sichuan　621000, China
2.
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an　710049, China

摘要

摘要: 绝热结构设计是建造大型低温风洞的关键环节之一。结合数值计算与试验，开展了绝热结构设计和性能分析研究。基于风洞运行条件，对绝热结构进行了设计和选材；建立了绝热结构有限元模型，基于风洞运行的最恶劣工况对绝热结构性能进行了数值计算分析，分析其绝热特性和应力分布规律。设计构建了可模拟低温风洞服役环境的试验舱平台，开展了低温交变压力冲击下的应力/应变和温度测量试验。研究结果表明：设计的绝热结构满足低温风洞运行要求，设计的试验舱平台适用于绝热结构性能考核，也为研究其他材料在低温环境下的热力学性能提供了一套可靠的试验平台。
- 低温风洞 /
- 绝热结构 /
- 结构设计 /
- 性能分析
Abstract: The cryogenic wind tunnel is the best way to achieve flight Reynolds number testing in engineering application, with great strategy importance in the national defense field. The insulation structure has become one of the key technologies for building large cryogenic wind tunnels. On this account, design and property analysis on insulation structure is investigated with the help of numerical simulation and experiment. Firstly, considering the wind tunnel working condition, design and material selection for the insulation structure is carried out. Then, the finite element modeling of the insulation structure is built. On this basis, the property of the insulation structure is numerically studied based on the actual worst working condition of the wind tunnel. The insulation characteristics and stress/displacement distribution of the insulation structure are analyzed. Finally, the experimental platform able to simulate the working condition of cryogenic wind tunnel is designed and constructed to carry out the temperature and stress/strain measurement experiment for the insulation structure under cryogenic alternating pressure working condition. The obtained results show that the designed insulation structure satisfies the demands of the cryogenic wind tunnel in service, which solves the problem of insulation structure designation. Additionally, the designed experimental platform solves the problem of property evaluation of the insulation structure, which paves the way for building the cryogenic wind tunnel of our country in the future.
- cryogenic wind tunnel /
- insulation structure /
- structure design /
- property analysis

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图 1 绝热结构组成

Figure 1. Element of insulation structure

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图 2 数值计算模型

Figure 2. Numerical calculation model

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图 3 位移边界条件

Figure 3. Displacement boundary condition

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图 4 绝热结构模型温度场云图

Figure 4. Temperature field nephogram of insulation structure

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图 5 绝热结构模型热通量云图

Figure 5. Heat flux nephogram of insulation structure

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图 6 绝热结构模型位移场云图

Figure 6. Displacement field nephogram of insulation structure

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图 7 绝热单元温度场云图

Figure 7. Temperature field nephogram of insulation unit

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图 8 绝热单元热通量云图

Figure 8. Heat flux nephogram of insulation unit

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图 9 绝热单元位移场云图

Figure 9. Displacement field nephogram of insulation unit

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图 10 绝热单元应力场整体云图

Figure 10. Overall stress field nephogram of insulation unit

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图 11 绝热单元应力场剖视云图

Figure 11. Sectional stress field nephogram of insulation unit

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图 12 试验平台示意图

Figure 12. Sketch map of test platform

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图 13 试验舱与绝热结构

Figure 13. Test chamber and insulation structure

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图 14 热电偶测点位置

Figure 14. Thermocouple measuring points

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图 15 应变片测点位置

Figure 15. Strain gage measuring points

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图 16 应力/应变测量结果

Figure 16. Measurement results of stress/strain

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图 17 温度测量结果

Figure 17. Measurement results of temperature

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表 1 材料物性参数^[19]

Table 1. Physical parameters of materials^[19]

材料	热导率/（W·m^–1·K^–1）	密度/（kg·m^–3）	弹性模量/ MPa	泊松比	线膨胀系数/（10^–6 K^–1）	比热容/（J·kg^–1·K^–1）
不锈钢	16	8000	190×10³	0.29	18	500
闭孔硬质泡沫	0.018 （110 K）/ 0.024 （313 K）	100	64.36 （110 K）/ 32.04 （313 K）	0.30	47.3 （110 K）/ 62.5 （313 K）	1200
开孔软质泡沫	0.05	8	0.2	0.35	70	1060

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