摘要
航空发动机供油系统影响着飞行安全,而航空发动机的供油系统氧化结焦问题仍未解决,氧化结焦的颗粒会在管内发生聚集,影响供油管路和喷油系统的换热,甚至堵塞管路,严重地降低了航空发动机的可靠性。本文对七组航空发动机喷油嘴的实际运行工况进行流动换热的实验模拟,通过模拟发动机起飞、巡航、加速、下降等工况下喷嘴的换热情况,探究碳氢燃料在导油管内的结焦分布。在实验的基础上,针对碳氢燃料在导油管内的流动和换热进行数值模拟,探究其结焦的主要原因,对工程实践具有指导意义。
The aviation fuel supply system affects flight safety,and the problem of oxidation and coking of the fuel supply system of an aviation engine is still unresolved.Oxidized and coked particles will accumulate in the tube,affecting the heat transfer of the fuel supply pipeline and the fuel injection system,and even blocking the pipeline severely reduces the reliability of the aero engine.In this paper,the experimental simulations of the flow and heat transfer of the actual operating conditions of the fuel injection nozzles of seven groups of aviation engines are conducted.By simulating the heat transfer conditions of the nozzles under the conditions of engine take-off,cruise,acceleration,and descent,the hydrocarbon fuel is explored in the oil guide pipe coke distribution.Based on the experiments,numerical simulations of the flow and heat transfer of hydrocarbon fuel in oil guide pipes,and exploring the main causes of coking,are of guiding significance to engineering practice.
作者
刘祥灿
刘彩红
LIU Xiang-can;LIU Cai-hong(Shanghai Civil Aviation College,Shanghai 200235,China;Tianjin Sino-German University of Applied Sciences,Tianjin 300350,China)
出处
《装备制造技术》
2020年第1期64-68,共5页
Equipment Manufacturing Technology
关键词
航空发动机
氧化结焦
供油管路
碳氢燃料
aero engine
oxidative coking
fuel supply pipeline
hydrocarbon fuel
