Blade, fan and aircraft environment control system

Abstract

The invention provides a blade, a fan and an aircraft environment control system. The blade comprises a trailing edge (1), a leading edge (2), a rear edge (3) and a blade tip (4), wherein on any wing section of the blade, and the connecting line of the leading edge point of the leading edge (2) and the rear edge point of the rear edge (3) is a wing chord; and the length of the wing chord is the chord length, and the distance between the position, with the maximum airfoil thickness, of the wing section and the leading edge point accounts for 30%-40% of the whole chord length. According to the blade provided by the invention, the fan can be transformed, the airfoil pre-compressed part of the fan is added, the shock loss is weakened, and the isentropic efficiency of the fan is improved.

Description

technical field [0001] The present application relates to the technical field of aircraft air conditioning, in particular to a blade, a fan and an aircraft environmental control system. Background technique [0002] At present, the power of the mainstream aircraft cabin air conditioner comes from the bleed air of the aircraft engine. The high-temperature and high-pressure gas discharged from the engine enters the refrigeration package unit. Specifically, it can drive the compression wheel and the ram fan to run after the expansion wheel. The expansion wheel is mainly used to provide power and generate low temperature airflow. The compression wheel is mainly used to increase the low-pressure air pressure outside the high-altitude aircraft, and at the same time it has the effect of increasing temperature. The main purpose of the ram fan is to exchange heat for the heat exchanger. [0003] Most ram fans use conventional airfoils, which have the problems of low efficiency and ...

AI Technical Summary

Problems solved by technology

[0003] Most of the ram fans use conventional airfoils, which have the problems of low efficiency and high shaft work

The shaft power of the fan is high. In order to meet the design capacity of the system, it is necessary to increase the opening of the turbine inlet and increase the power of the turbine. As a result, the fuel consumption of the aircraft will increase.

[0004] Therefore, from the perspective of improving the shaft work of the fan, the transformation of the turbine can increase the shaft work of the fan, but at the same time it will also increase the fuel consumption of the aircraft and reduce the cruising range of the aircraft.

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