Accession Number : AD0282370

Title :   INVESTIGATION OF LIQUID METAL BOILING HEAT TRANSFER

Descriptive Note : Quarterly progress rept. no. 3

Corporate Author : MICHIGAN UNIV ANN ARBOR

Personal Author(s) : BALZHISER,RICHARD E. ; COLVER,C. PHILLIP

Report Date : JUL 1962

Pagination or Media Count : 50

Abstract : Potassium will be boiled from the outside of a 3/8-in OD Haynes-25 tube at temperatures up to 2000 F and heat fluxes of 10 to the 6th power Btu/hr sq ft. This study is intended to obtain experimental data for the nucleate boiling of potassium at fluxes near the critical. The effect of pressure on the critical flux will be investigated. Film boiling studies employing potassium as the test fluid and sodium as the heating fluid will be conducted. Boiling will occur from a 0.200-in Nb-1% Zr disk in a 1-in Nb-1% Zr tube. A forced circulation liquid metal loop will circulate potassium at liquid flow rates up to 2 gpm. The maximum fluid temperature in the loop will be 1800 F. Potassium will be preheated to various qualities using clamshell heaters. Condensing sodium is used to boil the potassium in the test section. Fluxes of up to 10 to the 6th power Btu/hr sq ft are anticipated. Two phase flow studies will be conducted as a part of the forced circulation investigation. Pressure drop and void fraction measurements will be made for different qualities and flow rates. Loop instrumentation will be used in conjunction with the pool boiling studies. Agravic studies with mercury are scheduled. Studies will be from 1 - 20 g's with the liquid level varied to insure uniform pressures at liquid-vapor and liquid solid interfaces. (Author)

Descriptors :   *HEAT TRANSFER, *LIQUID METALS, BOILING, DESIGN, FILM BOILING, FLUID FLOW, NUCLEATE BOILING, POTASSIUM, PRESSURE, RESEARCH MANAGEMENT, SODIUM, TEST EQUIPMENT, TEST METHODS, THERMODYNAMICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE