摘要
为了研究国产RP-3航空煤油在复杂油路内的热氧化结焦特性,结合航空发动机燃烧室燃油喷嘴内部典型油路结构特点,针对直管、螺旋管和L形弯管三种结构油路,基于恒定环境温度的试验方法开展氧化结焦试验研究。研究结果表明:直管的沿程结焦量呈现先增大后减小的形式,其峰值出现在直管的中后部;L形弯管的沿程结焦量存在较大幅度的波动,结焦量在试验件弯曲段整体保持较高的水平,结焦峰值位置相较直管提前出现;螺旋管的沿程结焦量分布表现为明显的双峰值形式。三种油路中,螺旋管的单位面积结焦量最大,在燃油进口速度为2m/s时,其值约是L形弯管的3.46倍,直管的单位面积结焦量最小。
In order to study the thermal autoxidation coke characteristics of domestic RP-3 aviation kerosene in complex pipeline,this paper combined characteristics of typical pipeline inside the nozzle of aero-engine combustor,and a way of constant ambient temperature was used to test the thermal autoxidation coke characteristics of straight pipe,helix pipe and L-shaped pipe.The results show that amount of coke along straight pipe presents a trend of increasing first and then decreasing,and the peak of amount of coke appears in the middle and rear part of the test pipe.There is a large fluctuation in the amount of coke along the L-shaped pipe,and it maintains at a high level in the bending region.The distribution of amount of coke along helix pipe exhibits a double peak form.Comparing three structures,the helix pipe has the largest amount of coke per unit area.When the fuel inlet flow rate is 2 m/s,it is about 3.46 times that of L-shaped pipe,and straight pipe has the smallest amount of coke per unit area.
作者
杨治
张净玉
姬鹏飞
骆东
何小民
YANG Zhi;ZHANG Jin-yu;JI Peng-fei;LUO Dong;HE Xiao-min(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2020年第10期2374-2381,共8页
Journal of Propulsion Technology
