Turboshaft engine intake device and operation method

Abstract

The invention discloses a turboshaft engine intake device and an operation method thereof. The turboshaft engine intake device comprises a central body component, a wedge component and a casing component, and is characterized in that a flexible deformable annular air chamber is embedded into the central body component, meanwhile, a wedge capable of moving in the axial direction is designed, and the profiles of the air chamber and the axial position of the wedge can be adjusted according to the working environment and the working state of an engine. When a helicopter works in unclean air environments such as the environment with dust sand, the intake system is enabled to work in a mode with high dust sand separation efficiency through increasing the height of the air chamber and moving the wedge forwards; and when the helicopter is in a cruising state, the intake system is enabled to work in a mode with high aerodynamic efficiency by reducing the height of the air chamber and moving the wedge backwards. The invention effectively solves the problem that a traditional fixed-geometry intake system cannot give consideration to both low-altitude efficient sand draining and high cruising aerodynamic performance.

Description

technical field [0001] The invention relates to the field of aeroengine design, in particular to the air intake system of a turboshaft engine. Background technique [0002] my country is one of the countries with the largest desert area in the world. The desert is an arc-shaped belt stretching across the northwest, north and northeast lands. This arc-shaped desert belt is 600km wide from north to south and 4000km long from east to west. In the desert area, the desert covers an area of ​​1.49 million square kilometers, accounting for 15.5% of the country's land area. Due to the convenient take-off and landing of the helicopter, the requirements for the airport environment are relatively low, and it can hover in the air. It is especially suitable for military and civilian rescue, supply, and fire fighting in the above-mentioned environment. Shaft engine) working efficiency and service life have all brought great harm. The inhaled dust and sand hit the high-speed rotating engi...

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Problems solved by technology

This idea is ingenious, but it is very difficult to realize. The installation of the worm device adds a lot of complexity to the system structure. At the same time, there are circumferential unevenness and sealing problems, and the current research on memory alloys still does not meet the requirements. level, therefore, the engineering application of this concept is extremely difficult

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