运输类飞机辅助燃油系统转输参数权衡分析

在保持原有的设计架构尽可能不变的情况下,运输类飞机可通过增加辅助燃油箱来实现短期内快速增程的目的,以达到大航程、长航时的设计目标,同时后续可作为多类特种飞机的改装平台。由于辅助燃油系统并不直接向发动机供油,而是在巡航阶段将燃油转输至基本型燃油箱内,因此在早期运输类飞机辅助燃油箱系统架构设计阶段,需尽早确定辅助燃油箱到基本型燃油箱的转输参数与转输策略,以便作为输入开展系统架构的权衡与多轮迭代。参考已有运输类飞机设计工程经验,通过对不同权衡方案进行对比分析,给出了在当前某型飞机辅助燃油箱最大设计载油量条件下的燃油转输速率和转输策略,同时考虑了最大载油量变化对分析结果的影响。研究形成的分析思路和方法对其余运输类飞机辅助燃油系统的设计具有一定的参考。

Trade-off analysis of transfer parameters in auxiliary fuel system of transport aircraft

While maintaining the original design structure as unchanged as possible, the transport aircraft can achieve the rapid range extension in the short term by adding auxiliary fuel tanks, in order to achieve the design goals of large range and long flight time. At the same time, it can serve as a modification platform for multiple types of special aircraft subsequently. Since the auxiliary fuel system does not supply fuel directly to the engine, but transfers fuel to the basic fuel tank during the cruise phase. As the result in the early stage of the design of the auxiliary fuel tank system for transport aircraft, it is necessary to determine the transfer parameters and transfer parameters and strategies from the auxiliary fuel tank to the basic fuel tank as early as possible, in order to use them as inputs to carry out trade-offs and multiple iterations of the system architecture. Reference to the existing experience in the design and engineering of transport aircraft and through the comparative analysis of different trade-off schemes, the fuel transfer rate and related strategy under the condition of the current maximum design fuel capacity of the auxiliary fuel tank of a certain type of aircraft were given in this paper, and the influence of the change of the maximum fuel capacity on the analysis results was also considered. In addition, the analysis methods here have certain reference for the design of other aircraft auxiliary fuel system.