Numerical and experimental investigations on two-phase flow of liquid nitrogen in a flexible transfer line

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

Nagendra, H.N.^1^2 ; Karthik, A.V.^3 ; Verma, Ravi^1^2 ; Kasthurirengan, S.^1 ; Shivaprakash, N.C.^2 ; Sahu, A.K.^4 ; Behera, Upendra^1

Centre for Cryogenic Technology, Indian Institute of Science, Bangalore, India^1

Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India^2

Manipal Institute of Technology, MAHE, Manipal, India^3

Institute for Plasma Research, Bhat Gandhinagar, India^4

关键词: Cryogenic fluids;    Experimental investigations;    Liquid level sensors;    Nitrogen transfer;    Transfer lines;    Transfer process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012198/pdf
DOI  :  10.1088/1757-899X/502/1/012198

来源: IOP

【 摘 要 】

Transfer of cryogenic fluids is a daily occurrence in laboratories and industries for various end applications. Vacuum or super insulated transfer lines are generally used to transfer cryogens to minimize the evaporation due to heat transfer. Because of the heat transfer and the nature of flow, most of the time two-phase flow occurs during the transfer of cryogens. It is necessary to estimate the amount of cryogen being evaporated and the quality of the flow in the transfer process. This paper deals with the numerical and experimental investigations on the two-phase flow behaviour of liquid nitrogen transfer through the developed flexible transfer line. Diode based liquid level sensors have been developed to measure the void fraction of the two-phase flow. The numerical and the experimental results are in good agreement with each other. Pressure drop and cool-down data of the transfer process is also presented in the paper.