| 摘要 |
A noise reduction system includes: a microjet ring (16) provided at an exhaust side peripheral edge of a main nozzle of a jet engine, and has a plurality of injection pipes (26) formed in a circumferential direction thereof at regular intervals; and a supply path configured to take part of compressed air in from a flow path in an upstream side of a combustor in the jet engine, and to guide the part of compressed air to the plurality of injection pipes (26), wherein the plurality of injection pipes (26) is configured to inject the part of compressed air to a jet flow. |
