【摘要】 简要介绍了发动机尾喷管的数学模型,基于特性方程建立了一种能够达到设计精度要求的快速简单的尾喷管性能仿真模型。该模型具有速度快,适用于大量计算等优点。用Modelica语言和Dymola编译器实现了尾喷管的性能仿真。通过发动机系统级模型的仿真实验,验证了尾喷管模型的有效性。结果表明,采用建立的性能仿真数学模型能够模拟尾喷管性能,并能够实现非设计转速小流量工况下的性能仿真,为设计尾喷管提供了一个有力的工具。更多还原

【Abstract】 The mathematical models for exhaust nozzle of gas turbine are briefly introduced.A rapid and simple mathematical simulation model for exhaust nozzle of gas turbine is developed based on the characteristic equations.This model has the advantages of swiftness and competence for large-scale calculations.The computer language Modelica and the editor Dymola are utilized to simulate the performance of exhaust nozzle.Several system-level models of aircraft engines are assembled to verify the validity of the exhaust nozzle model.It is shown that the mathematical model can properly simulate the exhaust nozzle’s performance even at off-design rotating speed and small flux.It can be used as a tool for exhaust nozzle design.更多还原