运输类飞机多油箱加油同时切断概率研究

Probability of simultaneously shutting off multiple fuel tank refueling for transport aircraft

运输类飞机研制过程中,往往会借鉴已有型号的设计经验,在加速研制进程的同时,也不可避免地造成了局限。以某型运输类飞机加油系统为例,计算分析了在三油箱布局条件下,综合考虑不同加油压力、计算步长、切断时间间隔及加油模式对多油箱加油同时切断概率的影响。结果表明,运输类飞机三油箱同时切断的概率基本为0,而多油箱同时切断概率一般不超过2%,特殊场景下不超过3%;该值随计算步长、切断时间间隔的降低呈现进一步下降趋势;自动加油模式下的多油箱同时切断概率低于手动加油模式。实际运输类飞机加油场景中较难出现三油箱加油同时切断的场景,而两个油箱的同时切断概率也并不高。此外,研究形成的分析思路和方法对其余运输类飞机加油系统设计也具有一定的参考。

In the process of development of transport aircraft,we often learn from the design experience of existing models for reference,which accelerates the development process but inevitably causes limitations.Taking a certain type of transport aircraft refuel system as an example,this paper calculates the influence of different refueling pressure,calculation step,shut-off interval,and mode on the probability of shut-off refueling simultaneously in multiple tanks under the condition off three-tank layout.The results show that the probability of three tanks shut-off at the same time of transport aircraft is basically zero,while the probability of multiple tanks shut-off simultaneously generally does not exceed 2%,and this value does not exceed 3%under special scenes.This value shows a further downward trend with the decrease of the calculation step and shut-off interval definition.The probability of multiple tanks shut-off in automatic model is lower than that in manual refueling mode.In the actual refueling situation of transport aircraft,it is quite difficult to have the scene of three fuel tanks being refueled and shut off at the same time,and the probability of two fuel tanks being shut off at the same time is also very low.In addition,the analytical ideas and methods formed by the research also have certain reference for the design of refueling system for other transport aircraft.