Gas turbine engine

A gas turbine engine comprising:

• a turbine;
• a bearing configured to rotatably support a rotor of the turbine;
• an exhaust diffuser connected to a downstream end of the turbine, the exhaust diffuser including an inner tube and an outer tube such that the inner tube and the outer tube form therebetween an exhaust passage having an annular shape;
• a bearing chamber formed radially inside the inner tube and configured to accommodate the bearing;
• a plurality of hollow struts extending across the exhaust passage and connecting the inner tube and the outer tube;
• an oil introduction passage extending through first one of the plurality of the hollow struts and configured to introduce a first portion of oil to be supplied to the bearing chamber;
• an oil drain passage extending through second one of the plurality of the hollow struts and configured to drain the oil from an oil drain inlet opened on a bottom surface of the bearing chamber;
• and
• an oil discharge passage configured to discharge a second a portion of the oil having passed through the oil introduction passage directly to the oil drain inlet.