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US 4,150,696 AGranted
Arrangement for suppressing vibrations caused by the flow of a flowable medium
AssigneeMax-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.
InventorsGerd E. A. Meier, Winfried Hiller
Life of this patent
Estimating the term…
Abstract
A flow passage for a flowable medium is bounded by a wall, and located in e flow passage are one or more devices which suppress the occurrence of such flow conditions in the medium as would tend to cause the development of vibrations in the flowable medium and in the walls surrounding the flow passage.
Claims39
In a fluid flow-through device, a combination comprising:
- first means defining a passage for conducting a stream of a fluid medium of a given kinematic viscosity v though the device;
- second means communicating with said first means and being disposed to impart fluctuations to said stream;
- and third means for controlling the flow characteristics of the medium to supress fluctuations in the stream, said third means including a first structure arranged within said passage downstream of said second means, said structure being permeable to the fluid medium and defining in its upstream portion a channel converging in the flow direction, a portion of said first structure surrounding said channel having a plurality of pairs of surfaces past which the medium flows at a speed u, said surfaces extending transversely with respect to the direction of flow, the surface in each pair being spaced from each other at a distance d which is determinative of the flow characteristics of the medium, said third means being operative for maintaining the Reynolds number Re=ud/v below 10.sup.3.
Dependencies are inferred from the claim text.