The method of temperature control system to control the ground start of the engine in rich oil state

Abstract

The invention belongs to the technical field of aircraft engine design, and provides a method for a temperature control system to control the ground start of the engine in a fuel-rich state, comprising the following steps: After controlling the ignition of the engine fuel, continuously monitor the indicated temperature of the temperature indicator and the HPC speed. When the indicated turbine exhaust temperature reaches 380°C-400°C, limit the oil supply of the engine oil supply line for one second, and then supply oil normally for one second. seconds, repeat this three to four times; If the turbine exhaust temperature still maintains an increasing trend after completing the above work, continue to repeat the "restricted-normal" pulse mode of the engine's oil supply pipeline according to the above method until the moment when the exhaust temperature decreases. The engine is started on the ground under specific environmental conditions, and the timely use of the invention can effectively suppress the exhaust temperature of the engine turbine, thereby achieving the effects of normally starting the engine and protecting the engine.

Description

Technical field [0001] The present invention belongs to the technical field of aircraft engine design, and provides a new method for controlling the exhaust temperature of the engine turbine during the ground starting process of the engine, which involves use during the engine starting at high altitude airports and / or at high ambient temperatures, specifically , It relates to a method for temperature control system to control the ground start of an engine in a rich state. Background technique [0002] Airports with an altitude of 2438 meters or 8000 feet and above are called high plateau airports. Since the operating environment of high-altitude airports is much more complicated than that of general airports, the operation of aircraft at high-altitude airports has many special requirements. The biggest risk of aircraft ground start at high altitude airports is that the turbine exhaust temperature limit is exceeded during engine start. The reason is that when the engine starts at...

AI Technical Summary

Problems solved by technology

The greatest risk of an aircraft ground start at a high-altitude airport is exceeding the turbine exhaust temperature usage limit during engine start, due to the reduced fuel flow due to the increase in air rarefaction relative to altitude when the engine is started at a standstill on the ground at a high-altitude airport Larger, the engine is in a relatively fuel-rich state during the engine start process, which causes the engine turbine exhaust temperature to be higher than that of the plain airport, and the engine overheating during the start process will affect the life of the engine or even burn the engine

Images