The present study investigates the effects of Coriolis force and centrifugal buoyancy force on heat transfer due to jet impingement on dimpled target surface (DT). Detailed heat transfer measurements were carried out using transient liquid crystal (LC) thermography, where the target surface was modeled as one-dimensional (1D) semi-infinite solid. Three different configurations of DT surfaces have been studied. The flow and rotation conditions have been kept the same for all the configurations, where the average Reynolds number (based on jet hole hydraulic diameter: ) was 2500 and the rotational speed was 400 rpm (corresponding to of 0.00274). Under nonrotating conditions, DT surface showed positive heat transfer enhancements compared to smooth target surfaces. Under rotating conditions, it was observed that rotation was helpful in enhancing heat transfer on leading and trailing sides for smooth target surface. However, for the DT surfaces, rotation proved to be detrimental to heat transfer enhancement.
Detailed Heat Transfer Measurements of Jet Impingement on Dimpled Target Surface Under Rotation
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Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received July 11, 2016; final manuscript received November 28, 2017; published online March 28, 2018. Assoc. Editor: Ting Wang.
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Singh, P., and Ekkad, S. V. (March 28, 2018). "Detailed Heat Transfer Measurements of Jet Impingement on Dimpled Target Surface Under Rotation." ASME. J. Thermal Sci. Eng. Appl. June 2018; 10(3): 031006. https://doi.org/10.1115/1.4039054
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