Research On Overall Performance Of Turboprop Based On 0D/2D Coupling Calculation

Turboprop engine has been widely used in medium and small military transport aircrafts,regional jets and general-purpose planes due to its high thrust efficiency and low oil consumption under high subsonic flight condition.The combined application of high performance computing technologies and modern communication technologies impels research and design of aero engine to convert from traditional experiments based 0D design to computer simulation technologies based predictive design in order to shorten design cycle and improve design efficiency.This dissertation is focused on the research and development of 0D/2D coupling computation based engine overall performance design.And it can be divided into 3 parts.The theoretical basis of several blocks of T-MATS platform is discussed in detail because all 0D simulations in the dissertation is based on the platform.A turboshaft engine performance simulation model is design to validate the accuracy of aero engine modeling in the platform.And a turboprop engine 0D performance simulation model is design and 2 optimization schemes for engine available power are proposed.2D simulations are built on the basis of Professor Wu Zhonghua's S1/S2 theory of 2 flow surfaces.S1 surfaces based engine turbomachinery design is discussed and applied to 3 compressors and 3 different schemes of free turbine and nozzle for 2D flow path and blade design.Through the CFD computation of S1 flow surface and 2D axisymmetric flow,aerodynamic performances of components are proved to satisfy the demand of engine overall performance.At last,3 kinds of engine available power distribution schemes of the turboprop engine are computed and analyzed by adopting 0D/2D coupling computation method.The result suggests that optimization scheme 1 has the lowest equivalent specific fuel consumption at both design and non-design states.