Method for controlling ground start of engine under oil-rich state by using temperature control system

Abstract

The invention belongs to the technical field of design of aircraft engines, and provides a method for controlling ground start of an engine under oil-rich state by using a temperature control system. The method comprises the following steps of controlling oil combustion and ignition of the engine, then continuously monitoring the indication temperature and HPC (high performance computing) rotating speed of a temperature indicator, when exhaust gas temperature of a turbine is indicated to reach 380-400 DEG C, limiting oil supply of an oil supply pipeline of the engine for one minute, then normally supplying oil for one second, and repeating for three to four times; and (2) carrying out the repeated oil supply operation of the oil supply pipeline of the engine in a pulse mode of 'limiting-normal operating'by using the method if the exhaust gas temperature of the turbine still increases after the work is completed till observing the decreasing state of the exhaust gas temperature. When the engine is subjected to ground start under specific environment condition, with the adoption of the method, the exhaust gas temperature of the turbine of the engine can be effectively inhibited, and thus the effects of normally starting the engine and protecting the engine are achieved.

Description

technical field [0001] The 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 engine ground start process, which relates to the use during engine starting at high plateau airports and (or) at high ambient temperatures, specifically The invention relates to a method for a temperature control system to control the ground start of an engine in a fuel-rich state. Background technique [0002] Airports with an altitude of 2,438 meters or 8,000 feet and above are called high-altitude airports. Because the operating environment of high-altitude airports is much more complex than that of general airports, the operation of aircraft at high-altitude airports has many special requirements. 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 ...

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

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