射流泵在主燃油控制系统中的应用及优化设计

Application and Optimization Design of Jet Pump in the Main Fuel Control System

结构简单、可靠性高的射流泵应用于主燃油控制系统中,用以提高齿轮泵入口压力,降低齿轮泵提取功率,从而达到降低系统燃油温度的目的。基于主燃油控制系统的工作原理,建立了某型主燃油系统AMESim仿真模型。通过试验验证与系统仿真结果的对比,确认了射流泵的实际温升控制效果及系统仿真模型的置信度,为射流泵的优化提供了指导和设计依据。优化结果表明:射流泵喷嘴直径是决定射流泵效率及系统控制品质的关键参数;优化后的射流泵温升控制效果更佳且能保证优良的系统控制品质。

The jet pump with simple structure and high reliability was used in the main fuel control system,so that the inlet pressure of the gear pump was improved,the extraction power of the gear pump was reduced,and the purpose of reducing the fuel temperature of the system was achieved.Based on the working principle of the main fuel control system,the AMESim simulation model of the main fuel system was established.Through the comparison between the test verification and the system simulation results,the actual temperature rise control effect of the jet pump and the confidence of the system simulation model were confirmed,which provided guidance and design basis for the optimization of the jet pump.The optimization results show that the nozzle diameter of the jet pump is the key parameter to determine the efficiency of the jet pump and the system control quality.The optimized temperature rise control effect of jet pump is better and the excellent system control quality can be guaranteed.