Key technology for mechanical design in large-scale cryogenic wind tunnel

LAI Huan; ZHU Changjiang; CHEN Wanhua; LIAO Daxiong; SUN Dewen

doi:10.11729/syltlx20210040

Volume 36 Issue 1

Mar. 2022

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Journal of Experiments in Fluid Mechanics > 2022 > 36(1): 19-26. > DOI: 10.11729/syltlx20210040

LAI H，ZHU C J，CHEN W H，et al. Key technology for mechanical design in large-scale cryogenic wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2022，36（1）：19-26.. DOI: 10.11729/syltlx20210040

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Key technology for mechanical design in large-scale cryogenic wind tunnel

1.
Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center, Mianyang 　621000, china
2.
State Key Laboratory of Aerodynamics, China Aerodynamic Research and Development Center, Mianyang 　621000, China

Funds: GUO X, ZHAO Y, WANG Y F. Some key structural mechanics problem in design and construction of large wind tunnels[J]. Bulletin of National Natural Science Foundation of China, 2017, 31(5): 432-436.

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Received Date: April 28, 2021
Revised Date: August 10, 2021
Accepted Date: November 21, 2021

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Abstract

The high range of the Reynolds number is a core requirement for the aircraft model testing in the wind tunnel, and the feasible engineering way for broadening it is reducing the total temperature of the fluid. Therefore the cryogenic wind tunnel is needed. The mechanical circuit system is the core function facility of the cryogenic wind tunnel with special characteristics as complex structure, high integrated functions, and cyclical loading bearer. By contrasting the design of the overseas the cryogenic wind tunnel and the domestic cryogenic technology, the key technologies for the cryogenic wind tunnel mechanical circuit system design are discussed in this article, such as cryogenic materials, thermal stress and deformation control, wide temperature range and heavy load transmission mechanism, liquid nitrogen spray valves and model transposing for cryogenic testing. The core indicators, technical difficulties and research approaches of each aforementioned key technology are expounded, respectively. Finally, some proposals are offered for the cryogenic wind tunnel mechanical design.
- cryogenic wind tunnel,
- key technology,
- mechanical circuit system,
- cryogenic engineering

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