Research of a New Design Method of Variable Area Nozzle Turbine for VCE: Harmonic Design Method

A new design method of variable area nozzle turbine (VANT) for Variable Cycle Engine (VCE) was expounded and researched in the paper. It is named as Harmonic Design Method, the purpose of which is to reach the demands of a series of objective conditions for the VCE turbine. Two turbines were designed using the present method and an original method discussed before. The characteristic maps of the two turbines were acquired by 3D numerical simulations to verify the feasibility and superiority of harmonic design method. Then specific analysis of the flows in two turbines under different objective conditions is performed. The results show that the turbine has good aerodynamic performance for all kinds of working conditions and reaches the design demands as well, and the flow fields are more reasonable in the turbine by harmonic design method than the original one.