考虑排放影响的飞机多学科优化设计

随着民用航空运输业的发展,飞机对气候环境的影响越来越受到重视。为了满足未来飞机设计中经济性和环保性等指标,有必要在飞机概念设计阶段综合考虑成本和排放的影响。本文使用全球平均温度变化作为衡量飞机排放对气候影响的标准,分析了飞机巡航高度和速度对于排放物的影响。进一步,通过整合气动、重量、成本和排放等学科模型,建立了飞机概念设计阶段的多学科优化框架。基于该优化框架,以机翼平面形状、飞行速度和高度等参数为优化变量,分别以排放最小和成本最低为目标,进行了单目标和多目标优化设计研究。Pareto最优前沿的优化结果显示,单位排放成本的高低会影响成本相对于排放性能的变化趋势。

Multidisciplinary design optimization incorporating aircraftemission impacts

Continuous increase in air traffic has caused a rise in public awareness of environmental impact of aircrafts,imposing the demand to satisfy the emission requirements for future aircraft concept design and development.In this paper,the average temperature variation is calculated to measure the environmental performance of different aircraft designs.It is firstly used to analyze the effects of cruise altitude and speed variation on the magnitudes of climate impact due to different aircraft emissions,and is then integrated into an aircraft design optimization framework at the conceptual stage,so as to optimize the minimum emission impacts and operating costs.The design variables considered in the optimization problems include aircraft configurations,engine parameters and cruise settings.Additionally,the impact of emission cost on the tradeoffs between economic and environmental performance are reflected on the Pareto-optimal front.