F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
172/22
F01N 1/00 (2006.01) F16K 47/08 (2006.01) F16L 55/027 (2006.01)
Patent
CA 1180662
ABSTRACT OF THE DISCLOSURE A device for attenuating noise of fluid in con-axisymmetric turbulent flow which comprises a conduit and a plurality of parallel aligned nested tubes in said conduit. The nested tubes are of varying cross-sectional size and have approximately the same cross-sectional shape. The tubes are eccentrically aligned with respect to each other such that a lower surface of each tube is in closely spaced relationship or is in substantially line contact with a surface of an adjacent tube along their longitudinal lengths, the line contact between all of the tubes being substantially at a common line, allowing for the thickness of the tube walls. A brace extends through and intercon- nects the nested tubes. In one embodiment, the noise attenuating device is spaced closely downstream from a reverse flow ball valve to provide a smooth transition from the non-axisymmetric flow discharging from the valve to substantially axisymmetric flow(or fully developed pipe flow) in the conduit downstream of the valve. The front of the tubes may be configured to lie in a plan generally transverse to the conduit. In another embodiment, the front of the tubes are configured to lie in a generated surface that is complementary to the exterior of the reverse flow ball valve.
404771
Fisher Controls International Inc.
Mcfadden Fincham
LandOfFree
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