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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.11 [2004] >
IJEMS Vol.11(5) [October 2004] >
| Title: | Effect of bluff body shape on vortex flow meter performance |
| Authors: | Gandhia, B K
Singh, S N
Seshadri, V
Singh, Jeeot |
| Issue Date: | Oct-2004 |
| Publisher: | CSIR |
| IPC Code: | Int. Cl.7 F15D 1/00, B04C 7/00 |
| Abstract: | Frequency of
shedding vortices in the wake of a bluff body is used to measure the flow rate
in vortex flowmeters. A smooth bluff body shape may not generate stable
vortices and needs sharp edges for the consistency of pulsed output. However,
such bluff bodies give higher-pressure loss and drag force and therefore a need
exists for optimising the body shape. In the present work, the flow over
various body shapes in a pipe have been analysed using computational fluid
dynamics to study the effect of body shape on pressure loss and drag
coefficient. It is observed that the body shape with sharp corners have
higher-pressure loss and drag compared to the cylindrical one. However, a
triangular body shape with splitter plate or diamond shape has low coefficients
of permanent pressure loss and drags compared to the other sharp cornered
bodies and hence are better suited for use in the vortex flowmeters. |
| Page(s): | 378-384 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.11(5) [October 2004]
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