摘要
燃烧室作为微型涡喷发动机关键部件,其结构直接影响发动机的整体表现。目前,台架试验是研究燃烧室的主要方法,这种方法不仅成本高而且周期长。通过构建一个能真实反映燃烧室工作机理的三维模型并简化其结构,使用CFD(Computational Fluid Dynamics)软件进行燃烧室冷态仿真研究以优化其性能。结果表明,针对原始结构存在主燃区难以形成稳定回流区且主燃孔进气量较少等问题,通过改进蒸发管出口形态,以及在此基础上对火焰筒挖孔形状和数量进行优化设计,使得主燃区外的气体能够较为稳定地流动。最终优化设计得到的燃烧室其总压恢复系数能达到0.942,并且压力分布均匀程度最好,使该燃烧室拥有较好的气动参数。
As a key component of the micro turbojet engine,the structure of the combustion chamber directly affects the overall performance of the engine.At present,the bench testing is the main method for studying the combustion chamber,which has the disadvantages of high cost and time consumption.This paper constructs a three-dimensional model that can truly reflect the working mechanism of the combustion chamber and simplifies its structure.CFD(Computational Fluid Dynamics)software is used to conduct cold-state simulation of the combustion chamber to optimize its performance.The results show that the original structure has problems such as difficulty in forming a stable return zone in the main combustion zone and low intake air into the main combustion hole.By improving the evaporator tube outlet shape and optimizing the shape and number of flame tube holes,the gas outside the main combustion zone can flow more stably.The total pressure recovery coefficient of the optimized combustion chamber can reach 0.942,and the pressure distribution is the most uniform,so that the combustion chamber has better aerodynamic parameters.
作者
刘豪杰
张钊
蒲海波
王坚
LIU Haojie;ZHANG Zhao;PU Haibo;WANG Jian
出处
《现代机械》
2025年第6期75-79,84,共6页
Modern Machinery
基金
成都信息工程大学科研基金资助项目(KYTZ2023025)。
关键词
微型涡喷发动机
燃烧室
蒸发管
仿真
micro turbojet engine
combustion chamber
evaporation tube
simulation
