Investigation of Rotor Stator Cavity Flowfield at Downstream of a High Pressure Turbine Disk

The present study aims to investigate the flow field of the cavity, that is bordered by HPT rotor disk and LPT stator disk, via CFD and 1D flow solver for a symbolic engine geometry. The cavity has two outlet regions, namely disk rim side and labyrinth seal side, and one inlet that is located at the middle of the stator surface. The test rig data, that is used for validating CFD method in the study, from Kilic and Owen [5] is performed at various disk speeds. It is intended to demonstrate unorthodox rotor-stator flow physics, in which rotor pumping is hindered by an impinged air on to the rotor surface. In order to expand the scope, analyses are conducted by varying turbulent flow parameters. The explanations, which are constructed on stream lines, temperatures, swirl ratios and pressures, on the results are carried out based on physicals concepts such as free & force vortex behaviour and windage effect. The outcomes of the unfamiliar rotor-stator behavior in the study is expected to be a guide for the ones who have an interest in rotor-stator designing in terms of thermal /flow discipline.