Exhaust diffuser having ejection hole and suction hole, and gas turbine having the same

摘要

An exhaust diffuser that is mounted at an outlet of a gas turbine to eject exhaust gas to the outside and includes hollow cylindrical internal diffuser guide and external diffuser guide. Further, the exhaust diffuser includes struts disposed between the internal diffuser guide and the external diffuser guide to space the internal diffuser guide and the external diffuser guide at a predetermined distance from each other, ejection areas formed on an outer side of the internal diffuser guide and having ejection holes for ejecting exhaust gas in a flow direction of exhaust gas, and suction areas formed on the outer side of the internal diffuser guide, disposed close to the ejection areas, and having suction holes for suctioning exhaust gas in the opposite direction to a flow direction of the ejected exhaust gas.