Influence of turbulence parameters, Reynolds number, and body shape on stagnation-region heat transfer

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Journal of Heat Transfer

DOI:https://doi.org/10.1115/1.2822619· OSTI ID:478461

Van Fossen, G J; Simoneau, R J ^[1]; Ching, C Y ^[2]

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1. NASA Lewis Research Center, Cleveland, OH (United States)
2. Syracuse Univ., NY (United States)

This experiment investigated the effects of free-stream turbulence intensity, length scale, Reynolds number, and leading-edge velocity gradient on stagnation-region heat transfer. Heat transfer was measured in the stagnation region of four models with elliptical leading edges downstream of five turbulence-generating grids. Stagnation-region heat transfer augmentation increased with decreasing length scale but an optimum scale was not found. A correlation was developed that fit heat transfer data for isotropic turbulence to within {+-}4 percent but did not predict data for anisotropic turbulence. Stagnation heat transfer augmentation caused by turbulence was unaffected by the velocity gradient. The data of other researchers compared well with the correlation. A method of predicting heat transfer downstream of the stagnation point was developed. 28 refs., 12 figs., 4 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 478461
• Journal Information: Journal of Heat Transfer, Journal Name: Journal of Heat Transfer Journal Issue: 3 Vol. 117; ISSN JHTRAO; ISSN 0022-1481
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
66 PHYSICS
HEAT TRANSFER
REYNOLDS NUMBER
SHAPE
STAGNATION POINT
TURBULENT FLOW