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Community Noise Assessment of Hybrid-Electric Aircraft Using Windmilling Drag on Approach
Journal of Aircraft ( IF 2.2 ) Pub Date : 2021-04-23 , DOI: 10.2514/1.c036177
Jacqueline L. Thomas 1 , R. John Hansman 2
Affiliation  

The modeling and assessment of the community noise impacts of a representative hybrid-electric aircraft implementing windmilling motors as drag generators on approach is presented. An increasing desire to reduce emissions caused by aviation has motivated the development of hybrid-electric aircraft that have some degree of their traditional gas-turbine propulsion replaced with electric propulsion. Turboelectric propulsion offers flexibility in the engine architecture that allows hybrid-electric aircraft to be capable of certain advanced operational noise abatement flight procedures. Steep and delayed-configuration approaches are example flight procedures that enable significant noise reductions on approach but require the aircraft to have enough drag for the approach to be stable. Windmilling is an alternative mechanism to create drag during descent and is possible in architectures where the fan is powered by an electric motor. Results examining the potential benefits of representative turboelectric aircraft implementing this controlled drag concept on both delayed deceleration and steeper approaches are presented. The results indicate that windmilling fans are quieter than standard drag-producing devices and can be used to yield significant community noise reductions compared to aircraft performing standard 3 deg continuous descent approaches.



中文翻译:

风车拖曳法研究混合动力飞机的社区噪声

提出了一种典型的混合动力飞机对社区噪声影响的建模和评估,该混合动力飞机采用风车电机作为进近时的阻力发生器。减少由航空引起的排放物的日益增长的愿望推动了混合动力电动飞机的发展,该混合动力飞机在一定程度上将其传统的燃气涡轮推进器替换为电力推进器。涡轮电推进技术为发动机架构提供了灵活性,使混合动力飞机能够执行某些先进的降低操作噪音的飞行程序。陡峭和延迟配置进近是示例性飞行程序,可以显着降低进近的噪声,但要求飞机具有足够的阻力才能使进近稳定。风车是在下降过程中产生阻力的另一种机制,在风扇由电动机驱动的架构中,风车是可行的。提出了检验代表性涡轮电动飞机在延迟减速和更陡峭的进近方式上实施这种受控阻力概念的潜在益处的结果。结果表明,与执行标准3度连续下降方法的飞机相比,风车风扇比标准的阻力产生装置更安静,可用于显着降低社区噪音。

更新日期:2021-04-23
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