Abstract
Variable inlet guide vanes (IGV), which are a type of swirling flow generator, are installed at the inlet of centrifugal compressors to reduce the inlet Mach number of the rotor blades. However, it is known that the flow instabilities occurs downstream of IGV. In this study, the circular cylinders with tangential blowing are applied as guide vanes to generate the swirling flow. The flow instabilities downstream of IGV / circulation cylinders with tangential blowing are investigated by conducting experiment and performing numerical simulation. Unsteady flow characteristics downstream of them are discussed.
