Accession Number : AD0766221

Title :   Forced Convection Heat Transfer to Subcritical Helium I.

Descriptive Note : Final rept.,

Corporate Author : NATIONAL BUREAU OF STANDARDS BOULDER COLO CRYOGENICS DIV

Personal Author(s) : Giarratano,Patricia J. ; Hess,R. C. ; Jones,M. C.

Report Date : MAY 1973

Pagination or Media Count : 46

Abstract : Preliminary results of an experimental investigation of heat transfer to liquid helium under forced flow conditions are reported for a 0.213 cm i.d. x 10 cm long test section subject to the following range of operating conditions: System pressures 1.1 - 2.1 atm; Mass velocities 4 - 64 g/s-square cm; Heat fluxes 0.04 - 0.53 W/square cm; Inlet subcooling 0.03 - 0.10 K. The effect of the above system parameters on the heat transfer and critical heat flux is discussed; a comparison of forced convection boiling with other modes of heat transfer (pool boiling and supercritical) and the performance of centrifugal pump used for circulating the liquid helium are also included in the report. (Author)

Descriptors :   (*HELIUM, *CONVECTION(HEAT TRANSFER)), SUPERCONDUCTIVITY, HEAT TRANSFER COEFFICIENTS, NUCLEATE BOILING

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE