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Flow Characteristics of Axial Flow Impellers for Viscous Fluids in Stirred Tanks

Ye Wen;Fang Xiahong;Dai Gance;Wu Minquan;Shen Jianping(Unilab Research Center of Chemical Reaction Engineering,East China Univetsity of Science and Technology)  
A laser Doppler anemometer was used to study the flow patterns,share rates,apparent viscosities and pump capacities for axial flow impellers in water,88% and 98% glycerine and a 1.5 wt%aqueous solution of sodium-carboxymethyl cellulose(CMC) in a stirred vessel.Results showed that flow patterns varied with Reynolds numbet and construction of impellers.The shear rates and apparent viscosities around impellers were quite different from those in the circulation regions.The pump capacity coefficients decreased with low Reynolds numbers for viscous fluids.
【Fund】: 联合化学工程实验室资助
【CateGory Index】: TQ051.72
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