Patent ID: 8813907
Filing Date: 2014-08-26
Classification: F02C,F02K,F05D

Abstract:
1. A noise reduction system for a jet engine, the noise reduction system comprising: a chamber provided at a portion of a supply path, the supply path starting upstream of a combustor in the jet engine and leading to a plurality of microjet nozzles which is provided at an exhaust side peripheral edge of a main nozzle of the jet engine, wherein the supply path is configured to supply part of compressed air into the chamber from a flow path positioned upstream of the combustor, the plurality of microjet nozzles is configured to inject the compressed air, which has been supplied to the chamber, into a jet flow exhausted from the main nozzle, the jet flow being formed of combustion gas exhausted from the combustor, the chamber includes: a cylindrical inner peripheral wall being part of the main nozzle, and a cylindrical outer peripheral wall being part of the main nozzle, the outer peripheral wall being formed so as to cover the inner peripheral wall from an outside thereof in a radial direction of the inner peripheral wall, the chamber is configured to allow the compressed air to be taken between the inner and outer peripheral walls.