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Improved Aerodynamics of a Hollow-Blade Axial Flow Fan by Controlling the Leakage Flow Rate by Air Injection at the Rotating Shroud

Article dans une revue avec comité de lecture
Author
ccPEREIRA, Michaël
ccRAVELET, Florent
1003528 Laboratoire d'Ingénierie des Fluides et des Systèmes Énergétiques [LIFSE]
AZZOUZ, Kamel
546381 Valeo.ai
AZZAM, Tarik
242513 École Militaire Polytechnique [Alger] [EMP]
OUALLI, Hamid
242513 École Militaire Polytechnique [Alger] [EMP]
ccKOUIDRI, SMAINE
ccBAKIR, Farid

URI
http://hdl.handle.net/10985/21376
DOI
10.3390/e23070877
Date
2021
Journal
Entropy

Abstract

Axial flow fans are used in many fields in order to ensure the mass and heat transfer from air, chiefly in the heating, ventilation and air conditioning industry (HVAC). A more proper understanding of the airflow behavior through the systems is necessary to manage and optimize the fan operation. Computational fluid dynamics (CFD) represents a real tool providing the ability to access flow structures in areas that measuring equipment cannot reach. Reducing the leakage flow rate, inherent in operation, by synthetic-jet techniques improves performance. This paper presents the CFD results performed on a hollow blade fan developed by our team. The leakage flow is controlled by blowing air from 16 designated circular holes and arranged on the fan shroud. We discuss the results for two rotational speeds (1000 and 2000 rpm) and two injection rates (400 and 800 L/min). The numerical results consistent with the experimental show, for the low rotation speed and high injection ratio, significant gains in power (53%), torque (80%) and leakage flow rate (80%).

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