Key technology for model access system in cryogenic wind tunnel
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摘要: 模型进出系统是大型低温风洞的重要组成部分，是实现低温模型更换的核心系统。大型低温风洞模型进出系统具有结构复杂、规模大、功能集成度高、对环境条件要求高等特点。通过对国外低温风洞模型进出系统设计建设历程的回顾，结合国内相关技术现状，分析讨论了大型低温风洞模型进出系统设计的关键技术，阐述了模型进出系统大空间低露点干燥系统、宽温域温度调节系统、大吨位高精度模型运输车、大型隔离门、干燥空间内散湿量控制、宽温域内绝热结构的设计技术难点，并针对性地提出了攻关方向和后续研究建议。Abstract: The model access system is an important part of the cryogenic wind tunnel, and it is the core system to realize low temperature model replacement. The model access system of the cryogenic wind tunnel has the characteristics of complex structure, large scale, high functional integration and high requirements for environmental conditions. By contrasting overseas the design of the model access system of the cryogenic wind tunnel and introducing the domestic current situation of related technologies, the key technologies of the design for the model access system of the cryogenic wind tunnel are discussed in this article, such as the large volume and low dew point air drying system, temperature regulating system with a wide temperature range, large-tonnage and high precision model cart, large lock door, moisture emission control in dry space, etc.. The technical difficulties and research approaches of each aforementioned key technology are expounded, respectively. Finally, some proposals are offered for the design of the model access system of the cryogenic wind tunnel.
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Key words:
- cryogenic wind tunnel /
- model access system /
- key technology /
- low dew point
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图 8 大型低温风洞模型进出系统典型运行流程
Figure 8. Operational process of model access system of cryogenic wind tunnel
表 1 NTF、KKK与ETW模型进出系统主要特点对比表
Table 1. Comparison table of model access systems of NTF, KKK and ETW
设备名称 模型进出
试验段位置模型进出时是否需
隔断上下游洞体模型车结构型式 模型更换是否
占用风洞模型更换时是否需要
人员进入试验段是否配置空气
干燥系统模型温度调节时
所处的位置NTF 试验段侧壁 需要 无模型车 占用 需要 是 试验段 KKK 试验段正下方 不需要 由试验段部分下壁板、
模型支撑机构等组成不占用 不需要 是 模型调温间 ETW 试验段正上方 不需要 由试验段上壁板、模型
支撑机构、仪器仓等组成不占用 不需要 是 温度调节与检测间 
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