先进客机设计中油耗指标的分解方法

先进客机最重要指标之一是油耗指标。研究一种将油耗指标进一步分解为更为具体的发动机的耗油率指标、客机的升阻比指标和使用空重指标的方法。以典型中程客机为例，应用分段解析方法建立客机飞行剖面的燃油量计算程序。应用计算程序分别分析了发动机的耗油率、客机的升阻比和使用空重的变化对油耗的影响。在此基础上，对发动机的耗油率、客机的升阻比和使用空重的指标进行规划，以满足先进客机油耗指标的要求。研究结果为未来客机确定出合理的升阻比、耗油率和使用空重的指标提供了参考。

Decomposition of Index for Fuel Burn in Advanced Airliner Design

This paper is aimed at the decomposition of the index of fuel burn into the more specific tech- nology index including lift- to- drag ratio, specific fuel consumption and operational empty mass for ad- vanced airliner design. A typical medium range airliner was considered as a baseline aircraft. A computer program based on the piecewise analytic model was developed to estimate fuel burn for the given flight profile. The impact of lift- to- drag ratio, specific fuel consumption and operational empty mass on fuel burn was presented by use of the computer program. The requirements of the lift- to- drag ratio, specific fuel consumption and operational empty mass for the future advanced airliner were investigated. The re- suits can serve as a useful guidance for determination of the lift- to- drag ratio, specific fuel consumption and operational empty mass in future airliner design.