5136Chemical EngineeringMedium
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of________?
A(1.2)3/5
B(1.2)5/3
C(1.2)2/3
D(1.2)3/2
Correct answer
B. (1.2)5/3
Explanation
The correct answer is (1.2)5/3.