用于分级燃烧的高性能燃油分配器的改进设计与仿真

Improved Design and Simulation of High Performance Fuel Distributor for Staged Combustion

为了提高燃料使用效率、降低污染物排放,在已有分级燃烧燃油分配器基础上,针对航空发动机双环腔燃烧室改进设计了1种高性能燃油分配器。简述了分级燃烧燃油分配器的工作原理,建立了其AMESim模型。根据设计要求,通过仿真验证了燃油分配器的稳定性、分配比与输入信号的稳态关系,计算了燃油分配器输出与燃油分配计划表之间的误差,分析了燃油分配器的动态特性以及对外部参数变化的鲁棒性,并且针对该分配器的非线性特性提出了解决办法。仿真结果表明:与文献[4]所设计的燃油分配器相比,改进设计的燃油分配器鲁棒性更好,稳态和动态性能更优。

In order to improve fuel efficiency and reduce pollutant emissions, a high performance fuel distributor was designed for the engine of double annular combustor based on the existing fuel distributor of staged combustion. Working principle of the fuel distributor for staged combustion was introduced and its model was developed with the simulation software called AMESim. According to the design requirements, the stability of the fuel distributor and the relationship between its distribution and input signal at steady state were verified by simulation. The error between fuel distributor＇s output and the fuel allocation plan table was calculated. The dynamic characteristics of the fuel distributor and its robustness of external parameter variations were analyzed. Moreover, a solution to the nonlinear characteristic of the fuel distributor was proposed. The simulation results show that the fuel distributor with improved design has better robustness, better steady state and dynamic performance compared with that in reference [4].