R. Ponnappan et al., TEST-RESULTS OF WATER AND METHANOL HIGH-SPEED ROTATING HEAT PIPES, Journal of thermophysics and heat transfer, 12(3), 1998, pp. 391-397
The existing rotating heat pipe (RHP) technology was examined and furt
her developed for possible cooling applications in high-speed rotating
electrical machines required for future designs of more-electric airc
raft. Several technical papers covering the results of the design, fab
rication, and testing of the RHP hardware in the low-to-intermediate r
otational speeds from 500 to 7500 rpm have been published in recent ye
ars. In this investigation, performance results are presented for stai
nless steel 316-methanol and stainless-steel 316-water high-speed rota
ting heat pipes (HSRHPs) that were tested at speeds up to 30,000 rpm f
or the first time in the history of RHP research. The HSRHPs were cool
ed by air and oil jets in separate tests to compare their relative per
formances. Interesting temperature profiles and test results are prese
nted for the HSRHPs that were heated by an induction heater and tested
in the temperature range of 20-250 degrees C for power inputs from 25
0 to 1300 W.