T-shape vortex shedder wherein the bluff body extends across the diameter of a circular pipe and has a length to width ratio between 1.56 and 2.0
US5351559A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1993 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | Aug 31, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/3259
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A T-shape vortex shedder comprises a bluff body having a width W between upper and lower ends thereof and an extended plate having a length L in the fluid flow direction which is perpendicular to the bluff body. The bluff body and the extended plate form a T-shape vortex shedder with a T-shape cross section. When this T-shape vortex shedder is placed in a fluid motion within a circular pipe, the bluff body is located upstream of the fluid flow, and the extended plate is located downstream of the fluid flow, such that vortex shedding is produced at the upper and lower ends of the bluff body. The T-shape vortex shedder is characterized in that the L/W ratio is approximately 1.56.about.2.0, and the fluid flow produces steady vortex shedding when the Reynolds number of the fluid flow is approximately 2.4.times.10.sup.3 .about.3.2.times.10.sup.4. Furthermore, two hollow pressure passages are established at the upper and lower ends of the bluff body, such that the vortex shedding frequency can be measured by a pressure transducer located outside of the circular pipe. This vortex shedding frequency is linear in relation to the Reynolds number, such that the T-shape vortex shedder of the p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.