Patent ID: 7293401
Filing Date: 2007-11-13
Classification: F02K

Abstract:
1. A turbofan jet engine comprising: a first exhaust duct to exhaust a first stream through a first exit end from an air stream taken from an inlet, the air stream being divided into the first stream and a second stream, one of the first and second streams being a fan bypass stream; a second exhaust duct to exhaust the second stream through a second exit end, the first and second streams being substantially coaxial at the first and second exit ends; and a noise-reducing stream director attached to a vicinity of at least one of the first and second exit ends to directly deflect the first stream to a direction that is away from and/or sideward relative to the second stream such that the first stream is eccentric relative to the second stream downstream of the first and second exit ends to perform a directional noise reduction.