Engine high-altitude starting oil supply adjusting method, device and system

Abstract

The invention provides an engine high-altitude starting oil supply adjusting method, device and system, and belongs to the technical field of aviation. The gas inlet flow needed when the engine is started is determined according to the minimum oil supply flow of the oil supply device and the combustion oil-gas ratio of the engine. And according to the determined air inlet flow, the engine starting physical rotating speeds at different heights are determined from a preset corresponding relation. And when the rotating speed of the engine reaches the physical rotating speed corresponding to the current aircraft height, oil supply ignition is started to start the engine. The requirement for reliable ignition of the turbine engine for the unmanned aerial vehicle within a large height range can be met. For an engine adopting a mechanical hydraulic fuel oil adjusting system, the starting height of the engine can be effectively increased without changing the mechanical structure of the fuel oil adjusting system, and the adverse effect on high-altitude starting due to the fact that the initial oil supply flow cannot be adjusted is overcome. The method only needs to introduce height signal control, is simple and effective, and has good engineering application value.

Description

technical field [0001] The present application relates to the field of aviation technology, in particular to a method, device and system for adjusting fuel supply for engine high-altitude start-up. Background technique [0002] At present, airborne unmanned aerial vehicles usually choose different engine ignition heights according to the launch altitude. Therefore, reliable and fast engine start in a large altitude range is very important to ensure the performance of unmanned aerial vehicles. In the initial stage of gas turbine engine design for unmanned aerial vehicles, the minimum and maximum fuel supply capacity of the fuel supply device is usually determined according to the starting height and working height of the engine, so as to meet the different needs of the engine, such as small flow for high-altitude starting and large flow for low-altitude cruising. Therefore, the minimum and maximum flow oil supply capacity of the oil supply device also affects the starting and...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the initial oil supply volume of the oil supply system in the mechanical hydraulic adjustment mode cannot be adjusted in the prior art, which leads to the limitation of the engine starting envelope, the application provides a method, device and system for adjusting the oil supply of the engine at high altitude

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