Heat Transfer and Flow Resistance Performance of Air Helical Flow Outside Upright Petal-Shaped Tubes
CHEN Shu1,2,CHEN Sheng3(1.College of Electromechanical Engineering,Zhongkai University of Agriculture and Technology,Guangzhou 510225,China;2.School of Electric Power,South China University of Technology,Guangzhou 510640,China;3.The First Branch of Guangdong Industrial Equipment Installation Company,Guangzhou 510655,China)
(1.College of Electromechanical Engineering,Zhongkai University of Agriculture and Technology,Guangzhou 510225,China;2.School of Electric Power,South China University of Technology,Guangzhou 510640,China;3.The First Branch of Guangdong Industrial Equipment Installation Company,Guangzhou 510655,China
Abstract：
The heat transfer performance and flow resistance of air were investigated with air flowing heli-cally outside five experimental petal-shaped tubes with the same diameter,but different in fin height and spacing.In the experimental range,results show that there is a suitable fin spacing to make the heat transfer characteristic best for the petal-shape tube with the same fin height.With the same fin spacing,when fin height is increased,the heat transfer characteristic is better and the flow resistance loss is big-ger.The higher system pressure outside tube is of the better heat transfer effect without increasing the flow resistance.The results provide reference to the design of the high-efficient upright helical-baffle heat-exchanger with petal-shaped tubes.
CHEN Shu1,2,CHEN Sheng3.Heat Transfer and Flow Resistance Performance of Air Helical Flow Outside Upright Petal-Shaped Tubes[J]. Chemcial Industry and Engineering, 2010,27(4): 299-302
2010, Vol. 27 
