Exhaust Gas Temperature Margin of A Jet Engine Cause Impact and Simulation

Abstract

When a jet engine starts, the temperature starts to increase within a range. At various durations of the engine run, there is some temperature. Higher the thrust, higher the heat. This temperature is called Exhaust Gas Temperature. Each type of engine has a maximum allowed exhaust gas temperature and the difference between the actual gas temperature and the maximum temperature is called the Exhaust Gas Temperature Margin. Airlines struggle to know which components should be replaced to obtain desired Exhaust Gas Temperature Margin. Formula for EGT Margin is EGT Margin = EGT Red Line – EGT Take off. Every airline aims to obtain a margin as high as possible. If the margin is very low, it is unsafe to use the engine and it could lead to fire in the engine. The article explains the root cause of lower margin, factors impacting the margin, what can be done to maintain a good margin and what must be avoided at all costs for the safety of the aircraft engine. Currently, there are no directions or guidelines on what engine components can be replaced to improve EGT Margin. The article shows how the simulation data was captured and what methodology was used to obtain the data.