Patent ID: 6672425
Filing Date: 2004-01-06
Classification: F01N

Abstract:
A noise abatement module comprising:an inside tube having an interior, an inlet side, an outlet side and a centerline; an outside tube; said outside tube circumferentially about said inside tube; a space defined by the inside of said outside tube and the outside of said inside tube; a plurality of inside tube perforations on said inside tube; said perforations providing fluid communication between said interior of said inside tube and said space; a plurality of inlet vanes inside said inside tube and proximate said inlet side of said inside tube; said inlet each having a first vane end and a second vane end; said second vane end of each inlet vane each being obliquely offset from the centerline of said inside tube; and a plurality of outlet vanes inside said inside tube and proximate said outlet side of said inside tube.