Ultra-efficient Engine Diameter Study
Ultra-efficient Engine Diameter Study
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发表时间：
2003-05
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通讯作者：
D. Daggett;Stephen T. Brown;R. Kawai
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作者：
D. Daggett;Stephen T. Brown;R. Kawai
从涡扇发动机时代开始，人们就对发动机风扇直径和涵道比（BPR）进行了优化研究，并认识到降低发动机核心喷流速度和增加风扇质量流率通常会提高推进效率。然而，性能折衷限制了在不降低飞机效率的情况下可实现的风扇流量。本研究确定了最佳的发动机风扇直径和BPR，给出了先进的超高效发动机技术（UEET）动力装置的效率，用于先进的亚音速机身。发动机直径研究历来集中在特定的发动机尺寸选择上，并且受到现有技术和运输基础设施的限制（例如，通过飞机舱门和货舱安装裸发动机的能力）。这项研究是唯一的定义最佳风扇直径和驱动程序为未来2015年（UEET）的动力装置，而不是限制发动机风扇直径的外部约束。本报告是对UEET引擎系统集成问题的研究的后续。发动机直径研究由位于华盛顿西雅图的波音幻影工厂通过NASA格伦革命航空航天发动机研究（RASER）合同根据任务订单10进行管理。位于亨廷顿海滩的波音幻影工厂完成了发动机/飞机尺寸的优化，而波音商用飞机集团（BCA）提供了设计监督。向塔斯基吉大学发出了一份单独的文件，以支持整个项目。
Engine fan diameter and Bypass Ratio (BPR) optimization studies have been conducted since the beginning of the turbofan age with the recognition that reducing the engine core jet velocity and increasing fan mass flow rate generally increases propulsive efficiency. However, performance tradeoffs limit the amount of fan flow achievable without reducing airplane efficiency. This study identifies the optimum engine fan diameter and BPR, given the advanced Ultra-Efficient Engine Technology (UEET) powerplant efficiencies, for use on an advanced subsonic airframe. Engine diameter studies have historically focused on specific engine size options, and were limited by existing technology and transportation infrastructure (e.g., ability to fit bare engines through aircraft doors and into cargo holds). This study is unique in defining the optimum fan diameter and drivers for future 2015 (UEET) powerplants while not limiting engine fan diameter by external constraints. This report follows on to a study identifying the system integration issues of UEET engines. This Engine Diameter study was managed by Boeing Phantom Works, Seattle, Washington through the NASA Glenn Revolutionary Aero Space Engine Research (RASER) contract under task order 10. Boeing Phantom Works, Huntington Beach, completed the engine/airplane sizing optimization, while the Boeing Commercial Airplane group (BCA) provided design oversight. A separate subcontract to support the overall project was issued to Tuskegee University.