Re-entrant groove heat pipe
Abstract
This paper describes theoretical and experimentally verified heat pipe characteristics of an axially grooved aluminum extrusion with a re-entrant groove profile. The extrusion is 13 mm diameter with 20 axial grooves, each groove consisting of a nominal .8 mm diameter channel with a .2 mm wide passageway connecting the channel to the hollow core. A computer program was written to compute the zero gravity heat transport capability of the extrusion. A heat pipe was fabricated and its performance characteristics measured. The characteristics of the pipe with ammonia at 20 C are: zero gravity pumping limit 143 w-meters; static wicking height 21.5 mm; evaporator and condenser coefficients 7300 and 20,500 watt/sq m C, respectively.
- Publication:
-
AIAA, 12th Thermophysics Conference
- Pub Date:
- June 1977
- Bibcode:
- 1977thph.confR....H
- Keywords:
-
- Computer Aided Design;
- Extruding;
- Grooves;
- Heat Pipes;
- Heat Transfer;
- Spacecraft Design;
- Aluminum;
- Ammonia;
- Oao;
- Performance Tests;
- Pumping;
- Weightlessness;
- Working Fluids;
- Fluid Mechanics and Heat Transfer