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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.15 [2008] >
IJEMS Vol.15(4) [August 2008] >
| Title: | Effect of swirl on the flow characteristics of S-shaped diffusing duct |
| Authors: | Anand, R B
Singh, S N
Rai, Lajpat |
| Keywords: | Curved diffusers
Intake ducts
Swirling flow
Secondary flows
Pressure recovery |
| Issue Date: | Aug-2008 |
| Publisher: | CSIR |
| Abstract: | The flow and performance characteristics of a S-shaped diffusing duct having an area ratio of 1.9, length of 300 mm and turning angle of 22.5º/22.5º have been experimentally investigated to establish the effect of swirl. The static pressure, total pressure, velocity and turbulence intensity are measured using a calibrated five-hole probe and constant-temperature hot-wire probe. The performance parameters are evaluated based on the mass-averaged quantities. A significant improvement in the pressure recovery coefficient is observed for swirl flow from 0.36 to 0.54. The improvement is observed for both, clockwise and anti-clockwise swirl, the improvement being higher for clockwise swirl. Flow uniformity at the exit is more uniform for clockwise swirl at the inlet. |
| Page(s): | 317-325 |
| ISSN: | 0971-4588 |
| Source: | IJEMS Vol.15(4) [August 2008]
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