英语释义

1. the ratio in an aircraft engine (such as a turbofan) of the amount of airflow that is bypassed around the engine's core to the amount that passes through the core
The bypass ratio is the amount of the air that passes through the fan—known as “cold thrust”—compared with the amount that passes through the core, or combustion chamber—“hot thrust.” Typically, the higher an engine's bypass ratio, the better its fuel efficiency.
— David Noland, Air & Space Smithsonian, February/March 2008

片语

ultra-high bypass-ratio超高旁通比

bypass ratio turbofan涵道比涡扇

bypass flow ratio旁流比

value of bypass flow ratio旁流比

high bypass ratio大涵道比

variable bypass ratio engine变涵道比发动机

BPR Bypass Ratio函道比

low bypass ratio低旁通比

bypass ratio range函道比范围

英汉例句

• modern low bypass ratio turbofan engine is the heart of the new fighter, whose performance and aerodynamic stability greatly affect the characteristics of the new fighter.

  涡扇发动机作为现代战斗机的心脏，其性能和稳定性对战斗机的性能和稳定性能有很大的影响。

• as an example, the development of a high bypass ratio turbofan engine was used to demonstrate how the constraints restrict design cycle parameters.

  以发展大涵道比涡扇发动机为例，说明了约束条件对设计循环参数的限制。

• as the bypass ratio of turbofan engine is more and more high, fan noise is a more important part to the overall turbofan engine noise.

  随着飞机广泛使用的涡轮风扇发动机涵道比的不断提高，风扇噪声在飞机总噪声中占有越来越突出的地位。

• the development and design features of the high bypass ratio turbofan engine in foreign are comprehensively summarized.

  较为系统地总结了国外大涵道比涡扇发动机的研制特点和设计特点。

• in a reversal of current design trends the mit concept increases the bypass ratio by minimizing expansion of the overall diameter of the engine and shrinking the diameter of the jet exhaust instead.

  与现行设计趋势相反，麻省的概念通过最小化发动机总体直径的尺度以及相应缩小喷气排放直径来增加涵道比。

• the case study of a high bypass ratio turbofan engine has verified the feasibility of a three-layer back propagation network.

  通过一个高涵道比涡扇发动机故障诊断的实例分析，验证了三层逆传播网络的可行性。

• therefrom some conclusions are obtained as:1. the system「s bypass ratio must be actively controlled by adjusting both core and bypass engine」s through flow areas.

  得到：（1）其必为变涵道比循环系统，由可变几何内、外涵通道提供对涵道比的主动控制；