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Flow Drag and Heat Transfer Performances of Dragreducing Fluid with Carbon Nanotubes Added
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SONG Bin,LIAO Liang,LIU Zhenhua
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(School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China）
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Abstract A new kind of dragreducing liquid was developed, which has not only the dragreducing characteristics, but also the enhanced heat transfer characteristics, because of adding carbon nanotubes (CNT) into the base fluid. In this study, the base fluid was pure water; the dragreducing additive CTAC (cetyltrimethyl ammonium chloride) and multi wall CNT were added to the base fluid to make dragreducing fluids. The production process was developed, the appropriate composition fraction was found, and the thermal and rheological properties were measured. The test indicates that the fluid temperature has a strong influence on the dragreducing and heat transfer characteristics. The dragreducing characteristics does not change after the addition of CNT， but the heat transfer characteristics have been greatly enhanced. The enhanced heat transfer technology of nanofluid can be used to solve the heat transfer deterioration problem of pure dragreducing fluid.
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Received: 15 January 2010
Published: 31 October 2010
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