Numerical Simulation on Inner Flow Field of Gas Turbine with Partial Inlet Flow

A three-dimensional, viscous, steady CFD analysis is performed for investigating gas turbine flow field with partial inlet flow, by solving RANS-Navier-Stocks equations and RNG k- turbulence model. The inner flow mathematics of turbine is studied in detail. The results show that the inner complex flow characteristics of the turbine can be predicted with the present simulation method; the inlet shock wave and flow separation occur in turbine because of the supersonic inlet flow, leading to worse load distribution on blade and turbine efficiency; strong three-dimensional vortex structures occur in the inner flow of turbine because of the partial inlet flow design and the high speed rotation of turbine; the turbine blades work under the alternating impact force, which imposes a bad effect on the blade stress distribution. This study may offer a reference for the design and engineering application of the gas turbine with partial inlet flow.