Heat transfer from an obliquely impinging circular air jet to a flat plate
- Southern Illinois Univ., Edwardsville, IL (United States). Dept. of Mechanical and Industrial Engineering
A series of experiments was conducted for the measurement of local convective heat transfer coefficients for an obliquely impinging circular air jet to a flat plate. In the experiments, the oblique angles selected were 90{degree}, 75{degree}, 60{degree}, and 90{degree} being a vertical jet. Two different Reynolds numbers of 10,000 and 23,000 were considered for the purpose of comparison with previous data available in the literature. Another parameter varied in the measurements was the dimensionless jet-to-plate distance, L/D. Four values of L/D (2, 4, 7 and 10) were considered in the experiments. Detailed local heat transfer coefficients were presented and discussed in relation to the asymmetric wall jet upon impingement of the jet flow. Results of experiments show that, for a given flow situation the point of maximum heat transfer shifts away from the geometrical impingement point toward the compression side of the wall jet on the axis of symmetry. The shift is more pronounced with a smaller oblique angle (large jet inclination) and a smaller jet-to-plate distance. Comparisons of experimental results with existing heat transfer data for both obliquely impinging jets and vertical impinging jets are made. The effect of oblique angles on heat transfer was assessed.
- OSTI ID:
- 445526
- Report Number(s):
- CONF-961105--; ISBN 0-7918-1520-X
- Country of Publication:
- United States
- Language:
- English
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