A gas turbine engine (also known as a combustion turbine engine) is a type of engine that belongs to the category of heat engines. The term “gas turbine” can be a broad classification, and the basic principles are largely similar, including gas turbine jet engines and others. The general term for a gas turbine engine usually refers to those used in ships (primarily military combat vessels), vehicles (typically large vehicles that can accommodate gas turbine engines, such as tanks, engineering vehicles, etc.), and power generation units, etc. The difference from propulsion turbine engines lies in that the turbine of a gas turbine engine not only needs to drive the compressor but also drives a transmission shaft, which is then connected to the transmission system of the vehicle, the propeller of the ship, or the generator, etc.