Patent ID: 8191546
Filing Date: 2012-06-05
Classification: F23J,F23M

Abstract:
1. A flue tuning system that includes: an inlet duct having an inlet cross-sectional area, the inlet duct being adapted for accepting a fluid flow in a flow direction that is normal to the inlet cross-sectional area; an outlet duct having an outlet cross-sectional area that is the same as the inlet cross-sectional area; an outer duct that is of an outer duct cross-sectional area, the outer duct cross-sectional area being greater than the inlet cross-sectional area and the outlet cross-sectional area, the outer duct being sealingly connected to the inlet duct and the outlet duct, while separating the inlet duct and the outlet duct; and at least two discs that are spaced apart from one another, one of the discs being positioned at a distance S from the inlet duct and another at the same distance S from the outlet duct and centered in the outer duct, each disc having a specified disc area that is smaller than the outer duct cross-sectional area, the disc positioned at a distance S from the inlet duct being supported within the outer duct by an attachment rod that allows pivoting of the disc about an axis that is normal to the fluid flow direction, the attachment rod supporting the disc positioned at a distance S from the inlet duct in a spaced apart manner from the outer duct to create an area between the disc and the outer duct that is at least as large as the inlet cross-sectional area, and an annular fin that projects inwardly from outer duct, the annular fin being positioned between the discs, so that flow of an exhaust gas entering the system through the inlet duct will be diverted by the disc/fin/disc flow arrangement without encountering a restriction in flow cross-sectional area.