吸气式组合发动机进口转换阀门通用特性的计算

A CALCULATION OF CHARACTERISTICS OF A TRANSITION VALVE FOR AIRBREATHING ENGINE

关键词:  空气喷气发动机  组合发动机  发动机阀  性能  计算

Key words:  Air breathing engine  Combination engine  Engine valve  Performance  Computation

摘要:

讨论了转换阀门的特性通用表达式。采用了工程实际上可以接受的无粘流动模型以及气体流过阀门时产生的各种损失,气体流过阀门时的落后角的模型。考虑了在片状阀门流通通道内气流的临界堵塞流动的模型与计算方法,以便能作改变阀门开度时的变几何阀门的性能计算。

Abstract:

Airbreathing engines are used for space shuttle in wide-changed flow conditions. Attransition process of two engines,a transition valve must be designed for two different engines. Thegeneral indicative mood of transition valve characteristics is discussed. The unviscous flow model andvarious loss,deviation angle models are adopted. These models can be used in design of the engines.When the valve is going to shut down, choking condition model is considered. The valvecharacteristics calculation has been done for the variable valve. These research results are useful fortheory ahalysis of transition valve for variable geometry,at off-design condition.