The MT-1 Single Stage HP Turbine

The MT-1 single stage HP-turbine, which had been investigated in the present study, is described in detail in (Kluge et. al. (2003)). Table 1 summarizes some basic geometrical and aerodynamic specifications of the design data of the TATEF turbine stage.

In order to carry out unsteady CFD simulations with an acceptable computa­tional effort the domain scaling method had been applied. There, it is desirable to obtain a small common integer factor as a blade number ratio between NGV and rotor. The original blade number of the rotor had been increased from 60 to 64 enabling to perform a time-dependent periodic computation with one stator passage and two rotor passages meshed. Usually the error, which results from changing the solidity, is acceptable, if the change in blade pitch is less than 10%, which is the case herein.