Beschreibung:
A new type of twin-web turbine disk (TWD) with receiving holes was designed and the corresponding simulation model was established. The effects of the inlet flow ratio of nozzle 1 to center inlet (P1) and the flow ratio of nozzle 1 to nozzle 2 (P2) on the heat transfer characteristics of the system were investigated. The RNG k-ε turbulence model was adopted as the simulation model. Maximum disk temperature (Tmax), the axial and radial temperature uniformity of the turbine disk were used as evaluation indexes. The results showed that Tmax was the lowest and both the axial and radial temperature uniformity were relatively good when P1 approached infinity. The effect of P2 on the heat transfer characteristics of the TWD with receiving holes was investigated by keeping P1 tending to infinity. Considering comprehensively, when P2 was equal to 2~3, Tmax, radial and axial temperature uniformity were relatively good. Compared with the previous optimization results of a traditional TWD done by our group, Tmax was 8.5 K lower and the maximum axial temperature difference was 4 K lower for the novel TWD. The radial temperature uniformity of the TWD with receiving holes was also better than that of the traditional TWD