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Heat Transfer Research
Facteur d'impact: 0.404 Facteur d'impact sur 5 ans: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v31.i6-8.90
pages 435-443

Local Heat Transfer Around the Perimeter of a Complex-Shape Channel in Stagnation Zones of Rod Bundles

N. V. Paramonov
Moscow State Aviation Institute (Technical University), Russia

RÉSUMÉ

An original technique of the experimental study which allows one to obtain distribution of the local coefficient of heat transfer around the perimeter of a complex-shape channel is suggested. This requires the solution of a number of problems of a methodical character, and to eliminate or considerably reduce heat overflows around the perimeter, i.e., by the walls of the complex-shape channel, and also to suggest the technique of transfer the data from the model experiment on large-scale mockups of rods to natural conditions. Experimental studies of local heat transfer in stagnation zones of complex-shape channels as applied to the interrod space of bundles of woven rods of fuel elements of nuclear reactors are made by the developed technique. Reduction of the local coefficient of heat transfer in stagnation zones of the channels by 25−35% compared to heat transfer on the remaining part of the perimeter is revealed.