发电系统跨音速部分进汽涡轮气动设计与优化

In order to solve the problem of low efficiency of high-speed airborne turbine power generation systems, this paper investigates a transonic partial-admission turbine stage with a Rafael nozzle as the sta-tor and a three-dimensional blade as the rotor through a combination of one-dimensional calculations and three-dimensional numerical simulations. After analyzing the flow field of the prototype turbine stage, a multi-island genetic algorithm is used to optimise the design of the turbine stage using the nozzle expansion angle, expansion section length, circumferential arrangement angle, the blade inlet and outlet angles and axial chord length as optimisation variables, through the integration of NX, NUMECA and ANSYS modules using the ISIGHT optimisation software. Finally, the optimum geometry parameters under the given design conditions are obtained. The optimization result show that the optimized turbine stage achieves a power of 74. 53 kW and an efficiency of 79. 60% with an improvement of 5. 1% over the prototype.