基于综合设计的涡轴发动机热力循环方案研究

为了对比研究不同热力循环参数的涡轴发动机方案,建立集总体性能设计、尺寸流路设计、部件初步气动设计和重量估算的总体/部件为一体的综合设计模型,利用部件效率/气动负荷耦合设计和涡轮冷气量计算模型,实现发动机总体/部件的耦合设计。结果表明:在现有的设计技术水平下,低压比方案、高涡轮进口总温方案以及低压比和高涡轮进口总温的组合方案各具优势;高热力参数方案的设计必须以技术的进步为前提;未来涡轴发动机的总体设计将会沿着高热力循环参数和低热力循环参数两种方向发展。

Study on Cycle Design Projects of Turboshaft Engine Based on Integration Design Method

In order to study on cycle design projects with different cycle parameters of turboshaft engine, the engine/components integration design model which includes performance calculation, gas-flow-path size estimation, preliminary aerodynamic design of components and weight estimation is set up. The engine/components coupling design method which combines the engine/components integration design model, coupling design maps of components efficiencies and aerodynamic loadings and turbine cooling flow estimation model is set up. The results show that firstly, low pressure ratio design project, high turbine inlet temperature design project and combined design project with low pressure ratio and high turbine inlet temperature have their own advantages in actual technology level. Secondly, high cycle design projects base on the advancement of technology level. Finally, the engine integration design directions of advanced turboshaft engine will develop towards high cycle design projects and low cycle design projects in the future.