Previous studies of the Rushton turbine have shown that the power number is sensitive to
the details of impeller geometry, and in particular to the blade thickness, but is independent
of the impeller diameter to tank diameter ratio. In this paper, a similar study is reported for the
pitched blade impeller. The results show that the power number is independent of blade
thickness, but dependent on the impeller to tank diameter ratio. This is exactly the opposite
result to that observed for the Rushton turbine. Physical explanations are given for the …