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Characteristic of Power Consumption for Paddle Impeller in Various Agitated Vessels  

Lee, Young Sei (School of Applied Chemical Engineering, Sangju National University)
Kato, Yoshihito (Department of Life & Material Engineering, Nagoya Institute of Technology)
Publication Information
Applied Chemistry for Engineering / v.16, no.5, 2005 , pp. 698-704 More about this Journal
Abstract
Power consumption for paddle impeller in spherical and cylindrical agitated vessel was measured over a wide range of Reynolds number from laminar to turbulent flow regions. The power correlation was obtained for both spherical and cylindrical vessels, where the apparent diameter of the spherical vessel was equal to the diameter of the cylindrical vessel (height equal to its diameter and had the same volume as the spherical vessel). The power consumption well correlated with the experimental results of Nagata, et al. and Hixson-Baum. Also the critical Reynolds numbers was directly related to the transition coefficient $C_{tr}$ characterizing the transition from a laminar to a turbulent flow region in the correlation proposed here.
Keywords
agitated vessel; critical reynolds number; power correlation; paddle impeller; characterizing transition coefficient;
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