User's manual for thermal analysis program of axially grooved heat pipe (HTGAP)

Technical Report · Fri Sep 01 04:00:00 EDT 1978

OSTI ID:6806423

Kamotani, Y

A computer program that numerically predicts the steady state temperature distribution inside an axially grooved heat pipe wall for a given groove geometry and working fluid under various heat input and output modes is described. The program computes both evaporator and condenser film coefficients. The program is able to handle both axisymmetric and nonaxisymmetric heat transfer cases. Non-axisymmetric heat transfer results either from non-uniform input at the evaporator or non-uniform heat removal from the condenser, or from both. The presence of a liquid pool in the condenser region under one-g condition also causes non-axisymmetric heat transfer, and its effect on the pipe wall temperature distribution is included in the present program. The hydrodynamic aspect of an axially grooved heat pipe is studied in the Groove Analysis Program (GAP). The present thermal analysis program assumes that the GAP program (or other similar programs) is run first so that the heat transport limit and optimum fluid charge of the heat pipe are known a priori.

• Research Organization: Case Western Reserve Univ., Cleveland, OH (USA)
• OSTI ID: 6806423
• Report Number(s): N-83-33102; NASA-CR-170563
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
COMPUTERIZED SIMULATION
ENERGY TRANSFER
FLUIDS
HEAT PIPES
HEAT TRANSFER
SIMULATION
STEADY-STATE CONDITIONS
TEMPERATURE DISTRIBUTION
WORKING FLUIDS