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Characterization of IGV-Rotor Interactions in a Pre-Whirl Axial Fan
Laboratory of Energetics and Conversion Systems, Faculty of Mechanical Engineering, University of Sciences and Technology, Houari Boumediene, BP 32 El-alia, Bab-ezzouar, 16111, Algiers, Algeria
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The main goal of this study is to determine the aerodynamic performance and to characterize unsteady flows in a high-speed high-reaction pre-whirl axial flow fan. The pressure waves’ main diametrical modes where two blades interact with two vanes and their sequences are predicted. There are mainly two mechanisms of IGV-rotor interactions identified; the first is attributed to the potential effect whereas the second is due to the wake-blade interaction and the advection of wake mixing into the blades’ passages. Both effects are dependent on the circumferential positions of blades and the axial inter-distance between IGV and rotor. The time mode analyses of pressure fluctuations recorded from different monitor points are determined and the frequencies of prevailing modes and those related to the vortical flow structure through the components are also identified. The understanding of vanes and blade rows interactions at various axial inter-distances is an important step in determining the beneficial and detrimental effects on the design of high performance axial fan stage.

Peer review status:Published

31 Jan 2020Submitted to Engineering Reports
04 Feb 2020Submission Checks Completed
04 Feb 2020Assigned to Editor
21 Feb 2020Reviewer(s) Assigned
26 May 2020Editorial Decision: Revise Major
24 Jul 20201st Revision Received
25 Jul 2020Submission Checks Completed
25 Jul 2020Assigned to Editor
19 Aug 2020Editorial Decision: Accept
18 Sep 2020Published in Engineering Reports. 10.1002/eng2.12278