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Study of Combined Heat Transfer Enhancement with Swirl Flow Generator and Flag-Type Insents

Chen Li; Xiang Dong  
Experimental study of convection heat trasfer in a horizontal circular tube with both swirl flow genenator and flag-type inserts is performed. A piece of spring with the length of 100 mm .the wire diameter of 1. 5 mm and the pitch of 4 mm is used to be the swirl flow generator.The number of flag-type inseits is 1 ̄3. This combined method shows the advantages of both components,heat transfer can be greatly enhanced in laminar and turbulent region with small flag drag.The cretria to evaluate the effect of heat transfer and flow resistance can be as high as 2.76.
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