摘要
针对某型涡扇发动机主燃油系统中存在低频脉动,影响发动机工作安全性的问题,对燃油流路中低频脉动的产生机理进行分析,明确低频脉动的影响因素,从脉动的影响因素出发,结合主燃油系统的工作原理和相关附件、管路装配关系,定位系统中低频脉动大的原因,并提出一种通过调整活门型孔尺寸抑制低频脉动的改进措施。改进后的活门随发动机开展整机试验验证,试验结果均表明:改进措施合理有效,对低频脉动的抑制效果显著,随着发动机的工作状态点和脉动基准值的变化,脉动幅值可降低5%~84%,大幅提升了发动机主燃油系统的工作可靠性,保证了发动机试车安全。
In view of the problem of low-frequency pulsation in the main fuel system of turbofan engine that could affect the safety of the engine,the mechanism of low-frequency pulsation in the fuel system was analyzed,and the influencing factors of low-frequency pulsation were clarified.Starting from the influencing factors of pulsation,and combined with the working principle of the main fuel system and the relationship between related accessories and pipeline assembly,the reason for the large low-frequency pulsation in the system was pinpointed,and an improvement method to suppress the low-frequency pulsation by adjusting the size of the valve type orifice was proposed.The improved valve was verified with a turbofan engine.The test results showed that the improvement method is reasonable and effective,and the pulsation amplitude can be reduced by 5%to 84%,greatly improving the working reliability of the engine's main fuel system and ensuring the safety of the engine.
作者
孙昊博
李凌汉
刘晓峰
SUN Haobo;LI Linghan;LIU Xiaofeng(Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2024年第10期464-470,共7页
Journal of Aerospace Power
关键词
涡扇发动机
主燃油系统
低频脉动
活门型孔
等增益比
turbofan engine
main fuel system
low frequency pulsation
valve type orifice
equal gain ratio
