MEASUREMENT AND COMPUTATION OF HEAT-TRANSFER IN HIGH-PRESSURE COMPRESSOR DRUM GEOMETRIES WITH AXIAL THROUGHFLOW

This paper makes comparisons between CFD computations and experimental measurements of heat transfer for the axial throughflow of cooling ai r in a high-pressure compressor spool rig and a plane cavity rig. The heat transfer measurements are produced using fluxmeters and by the co nduction solution method from surface temperature measurements. Numeri cal predictions are made by solving the Navier-Stokes equations in a f ull three-dimensional, time-dependent form using the finite-volume met hod, Convergence is accelerated using a multigrid algorithm and turbul ence modeled using a simple mixing length formulation. Notwithstanding systematic differences between the measurements and the computations, the level of agreement can be regarded as promising in view of the ac knowledged uncertainties in the experimental data, the limitations of the turbulence model and, perhaps more importantly, the modest grid de nsities used for the computations.