Abstract
Large eddy simulation of internal flow of a centrifugal blower was performed in order to analyze the rotating stall at a partial flow rate. The blower has 12 impeller blades and vaneless diffuser with a scroll. Numerical results were validated by comparisons with measurements in terms of static head, velocity distribution at the impeller outlet and propagating speed of a stall cell. Propagating speed of the stall cell are about 70% of impeller rotational speed in both the experiment and numerical computation.
