CALCULATION OF 3-DIMENSIONAL TRANSONIC TURBINE CASCADE FLOW

A computer code has been applied to inviscid and viscous flows through a linear turbine cascade operating in the transonic flow regime. The Euler and Navier-Stokes equations are solved by an explicit finite-volume time-stepping procedure based on the method of Jameson et al.1 for the integration of the Euler equations and extended to Navier-Stokes equations by Schwamborn.2 The inviscid and viscous results in two-dimensions represent the profile characteristics at midspan position and the three-dimensional, viscous results include sidewall effects. A particular consideration of the flow losses gives detailed information about secondary flow behavior. The computational results are compared to experimental data3-5 for the MTU-T5.1 profile at isentropic outflow Mach numbers of 0.7, 0.9, and 1.1.