航空煤油转子发动机缸内流动特性和燃烧特性研究
Study on Flow and Combustion Characteristics in-cylinder of Aviation Kerosene Rotary Engine
转子发动机是一种具有潜力的无人机动力设备,RP-3航空煤油是我军燃料通用化研究的重点研究对象。为此,开展航空煤油转子机的研究具有十分重要的科学意义。本文以Z160风冷转子机为研究对象,基于流体动力学仿真平台,建立并验证了转子机仿真计算模型。研究了转子机分别燃用汽油和航空煤油时,缸内流场分布、火焰传播过程、缸内压力变化等燃烧特性以及污染物质量变化。研究结果表明:(1)由于转子发动机特殊的旋转运动方式和燃烧室结构,缸内充量的流动非常复杂。(2)由于航空煤油的雾化特性较差,火焰传播速度较慢,在燃用航空煤油时,转子机的缸内压力峰值、压力升高率峰值和燃烧放热率峰值均小于汽油工况,火焰发展期和快速燃烧期较长,CO排放较高,缸内温度及NO排放较低。
Rotary engine is a potential UAV power equipment.RP-3 aviation kerosene is the key research subject of our military fuel generalization research.Therefore,it is of great scientific significance to carry out the research on aviation kerosene rotor engine.In this paper the simulation calculation model of Z160 air-cooled rotor engine based on the fluid dynamics simulation platform was established and verified.The combustion characteristics such as flow field distribution in cylinder,flame propagation process,cylinder pressure change and pollutant mass change were studied when the rotor engine was fueled with gasoline and aviation kerosene respectively.The research results indicated that:(1)Due to the special rotational motion and combustion chamber structure of the rotor engine,the flow of charge in the cylinder was very complex.(2)Due to the poor atomization characteristics of aviation kerosene and slow flame propagation rate,when the rotor engine fueled with the aviation kerosene,the peak pressure,peak pressure rise rate and peak heat release rate were all lower,the flame development period and rapid combustion period were longer,CO emissions were higher,and the cylinder temperature and NO emissions were also lower than those of the gasoline.
汪映;陈金戈;王东兴;
西安交通大学 能源与动力工程学院,西安 710049;西安交通大学 能源与动力工程学院,西安 710049;西安交通大学 能源与动力工程学院,西安 710049;
TK41
rotary engine aviation kerosene combustion characteristic flow characteristic
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