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Numerical investigation of geometric parameter effects on the aerodynamic performance of a Bladeless fan

Jafari, M ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1016/j.aej.2015.11.001
  3. Publisher: Elsevier , 2016
  4. Abstract:
  5. Aerodynamic performance of a Bladeless fan is numerically investigated considering the effect of five geometric parameters. Airflow through this fan was analyzed by simulating a Bladeless fan within a 2 m × 2 m × 4 m room. Analysis of the flow field inside the fan and the evaluation of its performance were obtained by solving conservations of mass and momentum equations for the aerodynamic investigations. In order to design the Bladeless fan an Eppler 473 airfoil profile was used as the cross section of the fan. Five distinct parameters, namely height of cross section of the fan, outlet angle of the flow relative to the fan axis, thickness of airflow outlet slit, hydraulic diameter, and aspect ratio for circular and quadratic cross sections were considered. Validating 3-D numerical results, experimental results of a round jet showed good agreement with those of the simulation data. The multiplier factor M is defined to show the ratio of the outlet flow rate to inlet flow rate from the fan. The obtained numerical results showed that the Discharge ratio has the maximum value for the height of 3 cm. The numerical outcomes of outlet thickness variation indicate that this parameter is one of the most influential parameters on the aerodynamic performance of a Bladeless fan. The results for the outlet thicknesses of 1, 2 and 3 mm showed that the Discharge ratio increased significantly when the outlet thickness decreased. © 2015 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V
  6. Keywords:
  7. 3-D numerical simulation ; Aerodynamic performance ; Bladeless fan
  8. Source: Alexandria Engineering Journal ; Volume 55, Issue 1 , 2016 , Pages 223-233 ; 11100168 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S111001681500191X