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Research on Heat Transfer Enhancement in Tube with MuItiple Flag-type Inserts

ChenLi;Xiang Dong  
Experimental study of forced convection heat transfer in a horizontal circulartube with multiple flag-inserts is performed to investigate the characteristics of fluid flow and heattransfer.The warking fluid is 30# turbine oil.The number of flag-insert is 1~5.The range of ex-perimental variables are 146≤Pr≤206; 1067≤Re≤685.7.When 4 inserts are fixed in the tubethe highest rato of h/h0 can be 4.1,but the maximum Δp/Δp0 is only 3.4. The highest value of creteria to evaluate the combined effect reachs 2.95.
【Fund】: 四川省应用基础研究基金
【CateGory Index】: TK124
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