Accession Number : AD0682496

Title :   CONVECTIVE AND BOILING HEAT TRANSFER UNDER HIGH CENTRIFUGAL ACCELERATIONS.

Descriptive Note : Final rept. 15 Jun 63-31 Aug 64,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS

Personal Author(s) : Preckshot,George W.

Report Date : 15 FEB 1968

Pagination or Media Count : 112

Abstract : This report describes the construction of a centrifugal boiler capable of operating at centrifugal accelerations of 8,400 g with a 1 in. water depth. The power dissipation from 2 heating elements approximately 9 in. long each is 11 1/2 K.W. to produce flux of 1,000,000 Btu/hr. - sq. ft. Convective heat transfer to 1280 g can be represented by: Nu - 0.15 (Ra) exp. 0.363; 2x10 to the 7th power < Ra < 8 x 10 to the 10th power. Boiling heat transfer is presented in graphical form. A calculational procedure was developed for determining the bubble size departing from solid surfaces with and without inertial forces taken into account. (Author)

Descriptors :   (*BOILERS, *HEAT TRANSFER), CENTRIFUGAL FIELDS, ACCELERATION, CONVECTION(HEAT TRANSFER), CONSTRUCTION, BUBBLES, INERTIA, BOILING

Subject Categories : Industrial Chemistry and Chemical Processing
      Air Condition, Heating, Lighting & Ventilating
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE