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Journal of Enhanced Heat Transfer
インパクトファクター: 1.406 5年インパクトファクター: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN 印刷: 1065-5131
ISSN オンライン: 1563-5074

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v18.i1.40
pages 41-53

INFLUENCE OF PITCH ON LOCAL HEAT TRANSFER DISTRIBUTION FOR CONFINED IMPINGEMENT OF MULTIPLE JET ARRAYS

Vadiraj Katti
Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India
Santosh V. Prabhu
Department of Mechanical Engineering, Indian Institute of Technology, Bombay Powai, Mumbai – 400 076, India

要約

Experimental investigations are carried out to study the influence of spanwise pitch and streamwise pitch on the local heat transfer distribution due to arrays of multiple impinging jets on a surface parallel to the jet plate. The spent air exits in all directions from the confined passage. The length-to-diameter ratio of the nozzles of the jet plate is 1.0. The mean jet Reynolds numbers based on the nozzle exit diameters (d) of 3000, 5000, 7500, and 10000 and jet-to-plate distances of d, 2d, and 3d are considered for all of the configurations. The local and average Nusselt number distributions are presented for all of the configurations covered in the present study. An optimum configuration is suggested on the basis of minimizing the mass flow rate of the coolant per unit area of cooled surface. Correlations are developed for the average Nusselt number and the coefficient of variance of the Nusselt number in terms of flow and geometric parameters.


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