Gear drive turbofan engine with reversely-mounted core machine

Abstract

The invention relates to an integrated design scheme of an aircraft engine, in particular to a gear drive turbofan engine with a reversely-mounted core machine. According to an existing aircraft layout, power is provided through the turbofan engine adopting a BLI technology, and by means of the layout, the higher requirements on the engine are required; and according to the high duct ratio, it is required that the engine is provided with the core machine which is smaller and more efficient, a huge fan is disproportionate to the small core machine, a high-pressure rotor system is matched with a low-pressure rotor system, and noise control becomes difficult. Therefore, the fan rotor systems are separated from the core machine, the core machine is reversely mounted, and the structural layout manner of the gear drive fan is adopted. By the adoption of the scheme, the gear drive turbofan engine has the beneficial effects that aerodynamic efficiency is high, the structure is simple and portable, the vibration level is low, maintainability is good, and the airworthiness requirements of advanced airliners / transport aircrafts in the future can be well met.

Description

technical field [0001] The invention relates to an integrated design scheme of an aircraft engine, in particular to a gear transmission turbofan engine with a reversely installed core engine. Background technique [0002] High bypass ratio turbofan engines have been widely used as the power system of large passenger aircraft and transport aircraft, and its structural layout has an important impact on the overall performance, airworthiness, installation and maintenance, and operating costs of the aircraft system. In order to meet the high thrust and high propulsion efficiency requirements of future advanced airliners, one of the effective ways is to increase the bypass ratio of the turbofan engine while reducing the airflow velocity entering the engine. By increasing the size of the fan and reducing the size of the core engine, the bypass ratio of the engine can be increased; by using the Boundary Layer Intake (BLI) technology, that is, by sucking in the low-speed boundary la...

AI Technical Summary

Problems solved by technology

For example, the fan of the engine must have sufficient resistance to intake distortion to cope with the low speed boundary layer airflow, and the high bypass ratio requires the engine to have a smaller and more efficient core engine, and the huge fan size is not proportional to the small core engine , making the high and low pressure rotor system matching and noise control more difficult

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