Power and mean flow characteristics in mixing vessels agitated by hyperboloid stirrers

摘要

The mean flow and energy consumption in vessels powered by hyperboloid stirrers was investigated. The Newton number followed an inverse linear law for Reynolds numbers below approximately 200, which had values more than twice higher the corresponding Newton number for a standard Rushton turbine. At high Reynolds number flow the power number varied between 0.5 for a D/T=0.78 impeller to 0.95 for a D/T=0.24 impeller, as compared to a value of 5 for the standard Rushton stirrer, and to values of 0.31 and 1.58 for the Chemineer and Prochem hydrofoils.