The present study uses a novel transient liquid crystal technique to measure heat transfer on a rotating, radially outward coolant channel with jet impingement and a crossflow outlet condition. The jet impingement cooling scheme is studied on the leading and trailing sides of a gas turbine internal coolant channel with the jet impingement target surface oriented normal to the direction of rotation. Several aspects of jet impingement are studied under rotating conditions: effect of increasing Rotation number (Ro = 0–0.003), effect of jet inclination angle (90° and 70° from the vertical), and effect of jet-to-target surface distance (H/d = 1, 3, and 5). Heat transfer measurements are obtained on the target surface using the transient liquid crystal technique. All configurations studied have a constant jet-to-jet spacing, P/d = 5. The spacing between the two adjacent rows is P/d = 3. Corresponding flow measurements are taken from stationary conditions. Results show that rotation does not change the heat transfer magnitudes and distributions greatly compared to the stationary results for all H/d and jet orientation cases. As x/d increases, stationary H/d = 5 heat transfer results show a steady decrease, where effectiveness of the jets diminishes. As x/d increases for H/d = 3, the maximum and minimum heat transfer values dampen to a steady constant average value. As x/d increases for H/d = 1, the heat transfer begins very low then steadily increases for higher x/d.
- Heat Transfer Division
Effect of Rotation on Jet Impingement Heat Transfer for Various Jet Configurations Available to Purchase
Lamont, JA, & Ekkad, SV. "Effect of Rotation on Jet Impingement Heat Transfer for Various Jet Configurations." Proceedings of the ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and Mass Transfer in Biotechnology; Environmental Heat Transfer; Visualization of Heat Transfer; Education and Future Directions in Heat Transfer. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 717-726. ASME. https://doi.org/10.1115/HT2012-58023
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