Vol.71, No.1, 2022, pp.961-977, doi:10.32604/cmc.2022.021406
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ARTICLE
Analysis of Flow Structure in Microturbine Operating at Low Reynolds Number
  • Mohamed Omri1,*, Yusuf Al-Turki2, Ahmed A. Alghamdi1, Amrid Amnache3, Luc G. Fréchette3
1 King Abdulaziz University, Deanship of Scientific Research, Jeddah, Saudi Arabia
2 King Abdulaziz University, Electrical and Computer Engineering Department, Jeddah, Saudi Arabia
3 Université de Sherbrooke, Interdisciplinary Institute for Technological Innovation (3IT), Sherbrooke, Canada
* Corresponding Author: Mohamed Omri. Email:
(This article belongs to this Special Issue: Role of Computer in Modelling & Solving Real-World Problems)
Received 02 July 2021; Accepted 03 September 2021; Issue published 03 November 2021
Abstract
In this paper, three-dimensional flows in laminar subsonic cascades at relatively low Reynolds numbers (Re < 2500) are presented, based on numerical calculations. The stator and rotor blade designs are those for a MEMS-based Rankine microturbine power-plant-on-a-chip with 109-micron chord blades. Blade passage calculations in 3D were done for different Reynolds numbers, tip clearances (from 0 to 20%) and incidences (0° to 15°) to determine the impact of aerodynamic conditions on the flow patterns. These conditions are applied to a blade passage for a stationary outer casing. The 3D blade passage without tip clearance indicates the presence of two large symmetric vortices due to the interaction between hub/casing boundary layers and the blade. Opening the tip clearance introduces the tip vortex, which tends to become dominant above a tip clearance of 10%. In addition to providing a description and understanding of the 3D flow in a MEMS microturbine, these results suggest the importance of considering 3D flows in the design of microturbomachinery, even though the geometry is dominantly 2D.
Keywords
Microturbomachinery; turbine; vortex; internal flows; secondary flows
Cite This Article
Omri, M., Al-Turki, Y., Alghamdi, A. A., Amnache, A., Fréchette, L. G. (2022). Analysis of Flow Structure in Microturbine Operating at Low Reynolds Number. CMC-Computers, Materials & Continua, 71(1), 961–977.
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