亚燃冲压发动机建模及性能研究

摘要

关于冲压发动机动力性能优化建模问题,冲压发动机模型及特性与飞行高度、马赫数、攻角有关,决定发动机的性能因素.为了优化冲压发动机动力性能和控制系统设计总体规划,提出建立亚燃冲压发动机特性计算的数学模型,借助于simulink仿真平台搭建了亚燃冲压发动机模块化的稳态仿真模型,进行不同飞行条件下的特性计算的分析,重点分析了不同进口条件对进气道正激波强度的影响.通过与GasTurb软件中模型参数比较验证了模型的正确性.仿真结果表明,模型可用于冲压发动机总体初步设计研究.%The research of the model and feature of ramjet engine is an important task, which is effictive to ramjet engine investigation and control system design. In this paper, the mathematic model of ramjet engine was established for feature calculation, and a ramjet engine simulation model was built based on simulinlc. The calculation results of different flight conditions were analyzed, especially the influences of various inlet conditions on the shock-wave intensity. The model' s reliability was verified through comparison with the model parameter in GasTurb which indicated that the model can be used in ramjet initial overall design.