民用飞机油箱干舱设计对燃油消耗曲线的影响分析

The Analysis of Influence on Fuel Tank Dry Bay Design of Civil Aircraft

民用飞机在飞行过程中随着燃油消耗飞机重心不断变化,而燃油重心的变化往往很复杂,油箱干舱的设计给燃油重心的计算增加了复杂度。本文主要探讨油箱干舱的设置对于燃油消耗曲线的影响,以进一步考察燃油消耗曲线的计算的油箱模型是否有必要对干舱部分进行处理。本文建立了带有干舱和无干舱设计两种油箱模型,对两种油箱模型的燃油消耗曲线进行计算分析。计算结果表明,干舱部分对应的燃油重心对整个油箱的燃油消耗曲线计算分析影响很小,在进行燃油消耗曲线计算时,在工程误差的许可范围内,为降低计算复杂度可不对干舱进行处理。

The center of gravity of the aircraft changes as the fuel consumes during flight.The computation of center of gravity of fuel is usually complex.The design of dry bay increases the complexity of fuel center of gravity computation.In order to investigate the necessity of considering fuel tank dry bay design when fuel consumption curve is computed,the influence of fuel tank dry bay design on fuel consumption curve is discussed.One fuel model with dry bay and other fuel model without dry bay are established.Their fuel consumption curves are computed and analyzed.The analysis results show that the influence of center of gravity of dry bay fuel on fuel consumption curve is very small,and that the dry bay can be ignored during the computation of fuel consumption curve within the allowable range of engineering errors.