Experimental Research of Perforation Rate for Multilayer Insulation Used in Cryogenic Transfer Lines

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Deng, B.C.^1^2 ; Yang, S.Q.^1 ; Xie, X.J.^1 ; Wu, D.W.^1^2 ; Pan, W.^1 ; Li, X.M.^1^2 ; Li, Q.^1^2

State Key Lab. of Technol. in Space Cryog. Propellants (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing

100190, China^1

University of Chinese Academy of Sciences, Beijing

100190, China^2

关键词: Absolute pressure;    Aluminized Mylar;    Cryogenic transfer line;    Effective thermal conductivity;    Experimental research;    Minimum value;    Multi-layer insulation;    Thermal Performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012118/pdf
DOI  :  10.1088/1757-899X/502/1/012118

来源: IOP

【 摘 要 】

In this paper, thermal performance through perforated multilayer insulation (PMLI) is experimentally investigated using a cryogenic transfer line test platform. PMLI consisting of double-Aluminized Mylar and silk netting for 25 layers cm-1 and 50 layers was tested. The experimental results show perforation rate has an optimum value of 0.39% and the corresponding heat flux and effective thermal conductivity reach a minimum value of 2.61 W/m2 and 2.31 ×10-4 W/(m⋅K). In addition, both q and ke increase with rise of absolute pressure in vacuum jacket and the absolute pressure should be maintained lower than 0.01 Pa at least. The research of optimal perforation of PMLI in this study offers reliable experimental basis for manufacturing perforated multilayer insulation cryogenic transfer lines.