Transonic Turbine Stage Three-dimensional Non-stationary Steady Flow Numerical Simulation And Research

Numerical simulation of the unsteady flow in a transonic turbine stage is still a hard work for CFD researcher. There are a lot of theses of this area in the state-of-the-art. Based on an engineering background, through numerical simulation of the flow field in the HP Turbine of the Energy Efficient Engine(E3), the article research the unsteady flow in a transonic turbine stage, the unsteady phenomena in the stage include the Shockwave, wake, shedding vortex, endwall vortex, passage vortex and leakage vortex, etc.There are two Shockwaves generated on the vane the tailing edge, one on suction side is named moving Shockwave, and name another on pressure side steady Shockwave. The two Shockwave and the wake generated in vane trail can influence the main flow periodically.The vortex simulated in this article include the shedding vortex induced by the vane trailing edge boundary layer, the endwall vortex generated by the endwall boundary layer interaction, the passage vortex generated by the rotor rotation, and the leakage vortex generated by the tip clearance flow.The CFD code used to simulate the fluid field is the commercial software Fluent. Through the numerical simulation, it can make a qualitative looking of unsteady flow in a transonic turbine stage and the numerical result can be a valuable result to the following research.