Boundary-layer acceleration effects on heat transfer from rough, protruding, discretely-heated strips
Book
·
OSTI ID:509297
- Mississippi State Univ., Mississippi State, MS (United States)
This work was conducted as a preliminary investigation into the existence and strength of a synergistic interaction between boundary-layer flow acceleration and surface roughness as a heat transfer enhancement mechanism for protruding discretely-heated strips. A series of tests was conducted with discretely-heated, protruding strips in a two-dimensional turbulent boundary layer. Three heating arrangements were used: flush-mounted smooth, protruding smooth, and protruding rough. Acceleration strengths ranged from zero up to one-half the smooth-wall relaminarization threshold. For the smooth-flush arrangement, the Stanton numbers decreased by up to 16% with increasing acceleration strength. For the smooth-protruding arrangement, the Stanton numbers remain almost constant over all acceleration strengths. For the rough-protruding arrangement, the Stanton numbers increase by up to 7% with increasing acceleration strength.
- OSTI ID:
- 509297
- Report Number(s):
- CONF-950828--; ISBN 0-7918-1702-4
- Country of Publication:
- United States
- Language:
- English
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