Suction inlet vortex investigation at low Reynolds numbers
Ho, Wei Hua
Bin Idris, Omar Faruq
New, Tze How
Date of Issue2015
School of Mechanical and Aerospace Engineering
Under certain flow conditions, when an inlet is aspirated in close proximity to a solid boundary, a vortex will form between the surface and the inlet. The formation and ingestion of such vortices could potentially lead to inefficient fluid suction by pumps or catastrophic damages in high-speed jet engines. Previous studies established the basic relationship of such inlet vortices formation threshold and geometry and flow conditions, though they were typically considered at significantly high Reynolds numbers. It remains unclear if there is a lower limit to the Reynolds number at which this phenomenon ceases to exist. This study shows that this phenomenon exists even at low Reynolds number of Re = 160. In particular, the results are generally in agreement with the previously established relationships at much higher Reynolds numbers but certain correlations are not as significant. This suggests that formation of inlet vortices may be less sensitive to Reynolds numbers effects than previously thought.
Low Reynolds numbers
Low Reynolds numbers
Transactions of the Canadian Society for Mechanical Engineering
© 2015 The Canadian Society for Mechanical Engineering. This paper was published in Transactions of the Canadian Society for Mechanical Engineeringand is made available as an electronic reprint (preprint) with permission of The Canadian Society for Mechanical Engineering. The published version is available at: [https://unisa.pure.elsevier.com/en/publications/suction-inlet-vortex-investigation-at-low-reynolds-numbers]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.