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Experimental investigation of an actively controlled automotive cooling fan using steady air injection in the leakage gap

Article dans une revue avec comité de lecture
Author
AZZAM, Tarik
242513 École Militaire Polytechnique [Alger] [EMP]
PARIDAENS, Richard
OUALLI, Hamid
242513 École Militaire Polytechnique [Alger] [EMP]
ccRAVELET, Florent
134975 Laboratoire de Dynamique des Fluides [DynFluid]
ccBAKIR, Farid
ccKHELLADI, Sofiane

URI
http://hdl.handle.net/10985/17889
DOI
10.1177/0957650916688120
Date
2017
Journal
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy

Abstract

In an axial fan, a leakage flow driven by a pressure gradient between the pressure side and the suction side occurs in the gap between the shroud and the casing. This leakage flow is in the opposite direction to the main flow and is responsible for significant energy dissipation. Therefore, many authors have worked to understand this phenomenon in order to reduce these inherent energy losses. Up to now, most of the studies reported in the literature have been passive solutions. In this paper, an experimental controlling strategy is suggested to reduce the leakage flow rate. To this end, a fan with hollow blades and a specific drive system were designed and built for air injection. Air is injected in the leakage gap at the fan periphery. The experiment was performed for three rotation speeds, five injection rates and two configurations: 16 and 32 injection holes on the fan's circumference. The experimental results of this investigation are presented in this article

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