Experimental heat transfer investigation of stationary and orthogonally rotating asymmetric and symmetric heated smooth and turbulated channels
Conference
·
OSTI ID:6127904
- Northeastern Univ., Boston, MA (United States) GE Aircraft Engines, Lynn, MA (United States)
Results of an experimental investigation to determine the effects of variations in wall thermal boundary conditions on local heat transfer coefficients in stationary and orthogonally rotating smooth walls and two opposite-wall turbulated square channels are presented. Findings are obtained for three distributions of uniform wall heat flux: asymmetric, applied to the primary wall only; symmetric, applied to two opposite walls only; and fully symmetric, applied to all four channel walls. Trailing side heat transfer generally increased with rotation number, whereas the leading wall results showed a decreasing trend at low rotation numbers to a minimum and then an increasing trend with a further increase in the rotation number. The stationary turbulated wall heat transfer coefficients did not vary markedly with the variations in wall heat flux distributions. While the asymmetric case exhibited a slight deficit in trailing wall heat transfer coefficients due to rotation, the symmetric case indicated little change, whereas the fully symmetric case showed an enhancement. 32 refs.
- OSTI ID:
- 6127904
- Report Number(s):
- AIAA-Paper--92-GT-189; CONF-920602--
- Country of Publication:
- United States
- Language:
- English
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