变循环发动机重量预估方法研究

Method Research of Variable Cycle Engine Weight Estimate

重量是航空发动机设计必须控制的一个重要指标,重量预估在航空发动机结构方案设计阶段不可或缺。根据发动机部件法的思想,建立了基于统计的各部件气动—结构经验关系模型,结合变循环发动机结构设计关键几何参数和部件气动热力参数,发展了变循环发动机重量预估方法,采用C++语言开发了变循环发动机重量预估程序,计算了双外涵变循环发动机重量和尺寸。结果表明此方法能够预估双外涵变循环发动机重量,重量尺寸误差满足飞机和发动机工程需求。

Weight is an important control indicator of aircraft engine design, and weight estimate is unavoidable in the initial design phase of aeroengine. According to the idea of engine element-method, statistic -based aerodynamic and structure empirical relatio^hip of every assembly models were built. Combined with the key geometric parameters and aerothermodynamics parameters of assembly of variable cycle engine structure design, variable cycle engine weight estimate method was developed. Based on C＋＋ program language variable cycle engine weight forecast program was developed and the weight and size of a double bypass variable cycle engine was calculated. Results show that the method could estimate the double bypass variable cycle engine weight and error could satisfy the plane and engine engineering demands.