Heat transfer and friction in subsonic steam flows in hightemperature heat pipes
Abstract
The steam flow during the steadystate operation of heat pipe is analyzed on the basis of solutions of partial equations of conservation of mass, momentum, and energy, obtained by reducing them to a system of two ordinary differential equations. The solution of the energy equation is expressed in the form of a function of the flow rate, assuming that the flow rate at the wall is constant. The portion of the heat transferred by conductivity is determined from the Fourier formula, proceeding from the temperature profile at the wall. For sodium as the heat transfer agent, it is shown that the heat due to heat transfer between the wall and steam constitutes 1% of the heat of transformation.
 Publication:

Inzhenerno Fizicheskii Zhurnal
 Pub Date:
 March 1976
 Bibcode:
 1976InFiZ..30..397F
 Keywords:

 Conductive Heat Transfer;
 Convective Heat Transfer;
 Friction Factor;
 Heat Pipes;
 Steam Flow;
 Conservation Equations;
 Flow Velocity;
 Forced Convection;
 Steady State;
 Temperature Distribution;
 Wall Flow;
 Fluid Mechanics and Heat Transfer