Enhancement of nucleate boiling heat flux on macro/micro-structured surfaces cooled by multiple impinging jets
Book
·
OSTI ID:485003
- Univ. of California, Los Angeles, CA (United States)
An experimental investigation of nucleate boiling heat transfer from modified surfaces cooled by multiple in-line impinging circular jets is reported and found to agree with single jet results. To increase the maximum heat flux (CHF) and heat removal rate, the boiling surface was modified by both macro and micro enhancements. Macro modification consisted of machined radial grooves in the boiling surface, while micro modification was achieved by sintering. Macro enhancements allow higher CHF at lower superheat, with both enhancements pushing the nucleate boiling curve upwards and to the left. With the addition of both micro and macro structured enhancements, maximum heat flux and nucleate boiling can be enhanced by more than 200%.
- Sponsoring Organization:
- National Aeronautics and Space Administration, Washington, DC (United States)
- OSTI ID:
- 485003
- Report Number(s):
- CONF-960815--
- Country of Publication:
- United States
- Language:
- English
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