Airfoil Profile Reformation of Bladeless Fan and Investigation of Flow Increase Curve

Authors

Professor Prof., Mech. Eng., Sharif University of Technology, Tehran, Iran

Abstract

In the present investigation, in spite ofintroducing the effective parameters in the Bladeless fan performance,the profile of fan cross section was studied precisely because it is the most important sectionof designing this kind of fan. In order to modify the fan cross section and by considering the similarity of bladeless fans to airfoils, five profiles were chosen among the standard airfoil profiles by considering the important geometric parameters such asradius of leading edge, maximum thickness of airfoil compatible with the original airfoil. In addition, five profile were designed to create uniform airflow in front of fan and to prevent the separation of flow as well as the manufacturing criteria. By solving the momentum and continuity equations for incompressible fluid, the flow was analyzed numerically in 3D form. The aerodynamic characteristics of the designed airfoils and the original airfoil of the Bladeless fan wereindicated and compared to eachother.The fan was located in the centerof a 4×2×2m room and  Eppler473 airfoil profile was used as the cross section of this fan.Accoring tothe obtainednumerical results, the flow increase curve of the fan versus different inlet flowrate was depicted. The flow increase curve shows that the outlet flow rate increasedlinearely by increasing the inlet flow rate.

Keywords

Main Subjects

References

[1] Gammack PD, Dyson J, Smith AG, Brough IJ, Teyu MS, Mohd SN (2012) European Patent No. EP 2518325. Munich, Germany: European Patent Office.
[2] Kim HJ, S Lee N Fujisawa (2006) Computation of unsteady flow and aerodynamic noise of NACA0018 airfoil using large-eddy simulation. Int J Heat Fluid Fl 27(2): 229-242.
[3] McArthur J (2007) Aerodynamics of Wings at Low Reynolds Numbers. Department of Aerospace and Mechanical Engineering, University of Southern California, PH.D Thesis.
[4] Young J, Lai JC, Platzer MF, Srinivas K, Freymuth P, Koochesfahani MM, Triantafyllou MS (2004) Oscillation frequency and amplitude effects on the wake of a plunging airfoil. AIAA journal 42(10): 2042-2052.
[5] Siauw WL, Bonnet JP, Tensi J, Cordier L, Noack BR, Cattafesta L (2010) Transient dynamics of the flow around a NACA 0015 airfoil using fluidic vortex generators. Int J Heat Fluid Fl 31(3): 450-459.
[6] Chandravanshi LK, Chajjed S, Sarkar S (2010) Study of wake pattern behind an oscillating airfoil. Proceeding of the 37th National & 4th International Conference on Fluid Mechanics and Fluid Power, December 16-18: india.
[7] Blackwell TJ (2011) Subsonic wind-tunnel wall corrections on a wing with a clark y-14 airfoil, Department of Mechanical and Aerospace Engineering, San Jose State University, M.Sc. Thesis.
[8] Eleni DC, Athanasios TI, Dionissios MP (2012) Evaluation of the turbulence models for the simulation of the flow over a national advisory committee for aeronautics (NACA) 0012 airfoil. Journal of Mechanical Engineering Research 4(3):100-111.
[9] Vad J, Bencze F (1998) Three-dimensional flow in axial flow fans of non-free vortex design. Int J Heat Fluid Fl 19(6): 601-607.
[10] Lin SC, Huang CL (2002) An Integrated experimental and numerical study of forward–curved centrifugal fan. Exp Therm Fluid Sci 26(5): 421-434.
[11] Engin, T (2006) Study of tip clearance effects in centrifugal fans with unshrouded impellers using computational fluid dynamics. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 220(6): 599-610.
[12] Karanth KV, Sharma NY (2008) CFD analysis of a centrifugal fan for performance enhancement using converging boundary layer suction slots. World academy of science, Engineering and Technolology, 224(8): 1665-1678.
[13]  Hurault J, Kouidri S, Bakir F, Rey R (2010) Experimental and numerical study of the sweep effect on three-dimensional flow downstream of axial flow fans. Flow Meas Instrum 21(2): 155-165.
[14] Sun X, Sun D, Yu W (2011) A model to predict stall inception of transonic axial flow fan/compressors. Chin J Aeronaut 24(6): 687-700.
[15] Lu FA, Qi DT, Wang XJ, Zhou Z, Zhou HH (2012) A numerical optimization on the vibroacoustics of a centrifugal fan volute. J Sound Vib 331(10): 2365-2385.
[16] Abbott IH, Von Doenhoff AE (1959) Theory of wing sections: including a summary of airfoil data. Dover publications.
Journal of Solid and Fluid Mechanics
Volume 5, Issue 2 - Serial Number 2
July and August 2015
Pages 169-179

Files

Share

How to cite

Statistics