Flow characteristics of 3-D turning diffuser using particle image velocimetry

Nordin, Normayati and Abdul Karim, Zainal Ambri and Othman, Safiah and Raghavan, Vijay R. and Batcha, Mohd Faizal Mohideen and Hariri, Azian and Basharie, Siti Mariam (2017) Flow characteristics of 3-D turning diffuser using particle image velocimetry. AIP Conference Proceedings, 1831 (NIL). pp. 1-9. ISSN 0094-243X

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Abstract

It is often necessary in fluid flow systems to simultaneously decelerate and turn the flow. This can be achieved by employing turning diffusers in the fluid flow systems. The flow through a turning diffuser is complex, apparently due to the expansion and inflexion introduced along the direction of flow. The flow characteristics of 3-D turning diffuser by means of varying inflow Reynolds number are presently investigated. The flow characteristics within the outlet cross-section and longitudinal section were examined respectively by the 3-D stereoscopic PIV and 2-D PIV. The flow uniformity is affected with the increase of inflow Reynolds number due to the dispersion of the core flow throughout the outlet cross-section. It becomes even worse with the presence of secondary flow, 22% to 27% of the mean outlet velocity. The flow separation takes place within the inner wall region at the point very close to the outlet edge and the secondary flow vortex occurs dominantly within half part of the outlet cross-section.

Item Type:	Article
Uncontrolled Keywords:	NIL
Subjects:	T Technology > TP Chemical technology > TP200-248 Chemicals: Manufacture, use, etc.
Divisions:	Faculty of Mechanical and Manufacturing Engineering > Department of Mechanical Engineering
Depositing User:	Miss Nur Rasyidah Rosli
Date Deposited:	25 Jan 2022 00:28
Last Modified:	25 Jan 2022 00:28
URI:	http://eprints.uthm.edu.my/id/eprint/5923

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