Evaluation of the heat transfer performance of helical coils of non-circular tubes

查看全文 作　　者：Jundika [1]C.KURNIA;Agus [1]P.SASMITO;Arun [1,2]S.MUJUMDAR

机构地区：[1]Department of Mechanical Engineering,National University of Singapore;[2]Mineral,Metal and Material Technology Centre,National University of Singapore

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》索引2011年第12卷第1期,共8页

摘　　要：This study addresses heat transfer performance of various configurations of coiled non-circular tubes, e.g., in-plane spiral ducts, helical spiral ducts, and conical spiral ducts. The laminar flow of a Newtonian fluid in helical coils made of square cross section tubes is simulated using the computational fluid dynamic approach. The effects of tube Reynolds number, fluid Prandtl number, coil diameter, etc., are quantified and discussed. Both constant wall temperature and constant heat flux conditions are simulated. The effect of in-plane coil versus a cylindrical design of constant coil, as well as a conical coil design is discussed. Results are compared with those for a straight square tube of the same length as that used to form the coils. Advantages and limitations of using coiled tubes are discussed in light of the numerical results. 关键词：传热性能螺旋管非圆形计算流体力学方法平面螺旋槽螺旋线圈评价大肠杆菌

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Evaluation of the heat transfer performance of helical coils of non-circular tubes

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