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对在最严重热负荷时喷嘴内部燃油沉积率以及燃油性能参数的变化进行了试验研究。对1个相似的喷嘴试验件进行了传热试验,通过试验修正计算中关键的传热系数,建立了符合喷嘴实际的传热计算方法;用该方法推算发动机在真实条件下发生最严重热负荷的工况,然后进行了燃油沉积率试验,得到了燃油管道沉积率与温度的关系,同时得到了喷嘴和油滤上积沉的特征;对沉积物成分进行了分析,并测定了燃油油样进行性能参数。通过研究结果,提出了改善喷嘴燃油热安定性的措施。
Experimental studies on the change of fuel deposition rate and fuel performance parameters at the most severe thermal load were carried out. The heat transfer test was carried out on a similar nozzle test piece, and the key heat transfer coefficient in the calculation was corrected to establish the calculation method of heat transfer in line with the actual nozzle. By this method, the worst heat load of the engine under real conditions was calculated Then the fuel deposition rate test was carried out and the relationship between the deposition rate and the temperature of the fuel pipeline was obtained. At the same time, the characteristics of the deposition on the nozzle and the oil filter were obtained. The sediment composition was analyzed and the fuel oil sample Performance parameters. Through the research results, the measures to improve the thermal stability of the nozzle fuel are put forward.