1种新型燃油分配方案设计

针对航空发动机分级燃烧燃油分配的高精度、变比例需求,提出了1种基于主、副油路分路计量的新型燃油分配设计方案,并对该方案进行了理论分析以及仿真和试验验证。结果表明:该方案的燃油分配精度高,燃油分配比例调节灵活,可以满足发动机日益复杂的低污染设计和控制的需求;在主、副油路同时供油时,燃油分配最小比例与泵后压力负相关,与副油路喷嘴节流特性正相关。

Design of a New Fuel Distribution Scheme

Aiming at the requirement of high precision and variable proportion of fuel distribution in fractional combustion of engine,a new type of fuel distribution design scheme was put forward based on shunt metering of the main and pilot fuel passage,and the theoretical analysis,simulation and test verification of the scheme were carried out.The results show that the fuel distribution accuracy is high and fuel distribution ratio adjustment is flexible of the scheme,which can meet the increasingly complex low emission design and control requirements of the engine.The minimum proportion of fuel distribution is negatively correlated with the pump discharge pressure and positively correlated with the nozzle restriction characteristics of the pilot fuel passage when the main and pilot fuel passage are supplied simultaneously.