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摘要

Pratt & Whitney's baseline engine for Boeing's proposed 7E7 transport will rely on validated technologies and demonstrated advanced manufacturing techniques to meet the propulsion performance and cost of ownership targets set by the airframer. Pratt envisions a baseline powerplant in the 60,000-lb.-thrust class that incorporates: a fan of about 112-in.-dia. fitted with hollow blades; a compressor designed with three-dimensional aerodynamic codes; a low emissions com-bustor that relies on performance advancements in the company's basic Talon concept; and a two-stage high-pressure turbine. The engine is likely to have an operating pressure ratio of about 50 and a high bypass ratio of about 10:1 to decrease noise and increase efficiency. According to Pratt officials, this will allow the company to develop an engine "with a reasonable fan diameter," while reducing the core size of the engine to. something on the order of a PW2000.
机译:普惠公司为波音7E7拟议运输提供的基准引擎将依靠经过验证的技术并展示先进的制造技术来满足飞机制造商设定的推进性能和拥有成本目标。普拉特设想的基准动力装置的推力等级为60,000磅,其中包括:直径约112英寸的风扇。装有空心刀片;设计有三维空气动力学代码的压缩机;依靠公司基本Talon概念的性能改进的低排放燃烧器;和两级高压涡轮。发动机可能具有约50的工作压力比和约10:1的高旁通比,以降低噪音并提高效率。普拉特的官员表示,这将使该公司能够开发出“具有合理风扇直径的发动机”,同时减小发动机的核心尺寸。大约是PW2000。

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