NAVIER-STOKES ANALYSES OF THE REDISTRIBUTION OF INLET TEMPERATURE DISTORTIONS IN A TURBINE

The flow exiting the combustor and entering the turbine of a gas turbine engine is known to contain both spatial and temporal variations in total temperature. Although historically it has been presumed that the turbine rotor responds to the average temperature, recent experimental evidence has demonstrated that the rotor actually separates the hotter and cooler streams of fluid so that the hotter fluid migrates toward the pressure surface and cooler fluid migrates toward the suction surface. In the present study a time-accurate, two-dimensional, thin-layer, Navier-Stokes analysis of a turbine stage is used to analyze this phenomenon. The rough qualitative agreement between the measured and the computed results indicates that the analysis has successfully captured many of the important features of the flow. © 1988 American Institute of Aeronautics and Astronautics.