关键词: 航空发动机;RP-3航空煤油;燃油喷嘴;热氧化结焦;典型管路

Abstract: 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 2m/s， it is about 3.46 times that of L-shaped pipe， and straight pipe has the smallest amount of coke per unit area.

Key words: Aero-engine;RP-3 kerosene;Fuel nozzle;Autoxidation coke;Typical pipeline