An analysis of unsteady torque on a quasithreedimensional centrifugal impeller
Abstract
The effects of a change in the breadth of a centrifugal impeller on unsteady torque are determined on the assumption of a quasithreedimensional flow. Small sinusoidal fluctuations of rotational velocity and/or flow rate are considered. The unsteady torque is divided into three components: quasisteady, apparent mass, and wake. Numerical results show that the wake component is usually smaller than the other components. Apparent mass coefficients for the two disturbances are given for quasithreedimensional impellers. It is found that the outertoinner breadth ratio has little effect on the apparent mass coefficient for flowrate fluctuation, but the coefficient for rotational fluctuation is larger for impellers with smaller outertoinner breadth ratios.
 Publication:

JSME International Journal Series B
 Pub Date:
 October 1984
 Bibcode:
 1984JSMEB..27.2166T
 Keywords:

 Centrifugal Compressors;
 Computational Fluid Dynamics;
 Impellers;
 Three Dimensional Flow;
 Torque;
 Unsteady Flow;
 Analytic Functions;
 Angular Velocity;
 Flow Velocity;
 Sine Waves;
 Fluid Mechanics and Heat Transfer