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Bladeless Fan Design

Jafari, Mohammad | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44595 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Afshin, Hossein; Farhanieh, Bijan
  7. Abstract:
  8. In the present study, performance of a novel fan namely bladeless fan has been evaluated. The aerodynamic and aeroacoustic performances are studied by using 3D simulation of this fan. Mass conservation equation, momentum conservation equations and noise equations of FfowcsWilliams-Hawkings numerically solved to investigate performance of this fan. Firstly, fan cross section profile was designed by Eppler airfoil 473 instead of the prior profile as a modification then effect of different geometrical parameters on the performance is examined. These parameters are height of cross section, angle of output flow with respect to fan axis, thickness of output airflow, hydraulic diameter and aspect ratio, where the last parameter has been investigated for square and circle fan shape. After parametric study, large size of fan were designed and investigated numerically. Then two correlations were proposed to predict the amount of outlet flow rate and noise generation. Also a GUI code was developed using MATLAB for easy designing the fan. Finally, validating the results, a bladeless fan by 60 cm diameter was designed and experimental and numerical results were compared with each other
  9. Keywords:
  10. Computational Fluid Dynamics (CFD) ; Numerical Simulation ; Bladeless Fan ; Williams-Hawkings

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