Coupling arrangement for providing uniform velocity distribution for gas flow between pipes of different diameter

Abstract

Abstract Coupling arrangement provides uniform velocity distribution between pipes of different diameters where the diameter differences are gerater, and/or the axial spacing of the pipes is less than that which would be required to permit a uniform velocity distribution if a flared connector joined the ends of the two pipes. The coupling includes a frusto-conical transition member which connects the end of the larger pipe to the smaller pipe at a location which is spaced axially from its end. By closing the end of the smaller pipe except for at least one small opening proximate its axis and by providing a series of circumferentially spaced openings around its walls between its end and the points at which the transition member is attached to it, it is possible to cause gas flow from the smaller to the larger pipe to have a substantially uniform velocity distribution across the end of the large pipe. The coupler is particularly useful in distributing polluted exhaust gases from a relatively small diameter engine exhaust pipe to a relatively larger diameter honeycomb-shaped catalytic reactor element since it permits a minimum spacing between the exhaust pipe and catalytic element and a reduction in the amount of catalyst contained in the reactor.

Inventors

• 👤 R Carnanhan
• 👤 K Youtsey

Bibliographic Details