Measurement of Heat Transfer and Flow Structures in a Closed Rotating Cavity

Abstract Buoyancy-induced flow occurs inside the rotating compressor cavities of gas turbines. These are usually open at inner radius, but in some industrial turbines, they effectively closed. This paper presents measurements disk heat transfer and structures a closed cavity over wide range engine relevant conditions. experimentally derived distributions temperature flux first their kind to be published. The radial distribution nondimensional virtually collapsed onto single curve full experimental range. There was small, monotonic departure from this common with increasing Reynolds number; attributed compressibility effects where core increases as rotational speed increases. results imply that, if negligible, all should have uniquely related geometry material; is important practical use designer. Unsteady pressure sensors detected either three or four vortex pairs across number changed Grashof number, slipped relative disks by less than 1% speed.