The week's pick
Random Articles
Reseach Article
Experimental Study of CLARK-Y Smoothed Inverted Wing with Ground Effect
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 147 - Number 1 |
| Year of Publication: 2016 |
| Authors: Ihsan Y. Hussain, Mustafa S. Abood |
10.5120/ijca2016910962
|
Ihsan Y. Hussain, Mustafa S. Abood . Experimental Study of CLARK-Y Smoothed Inverted Wing with Ground Effect. International Journal of Computer Applications. 147, 1 ( Aug 2016), 45-54. DOI=10.5120/ijca2016910962
Abstract
Aerodynamic characteristics of inverted single element airfoil with and without ground effect had been investigated experimentally in Low-Speed Wind Tunnel of test cross section area (0.7x0.7 m2) and maximum velocity 55 m/s to quantify the aerodynamic characteristics of inverted CLARK-Y smoothed airfoil. The ground effect was introduced by using a fixed flat board moves vertically to produce the required distance between the airfoil and ground board. The model was tested with and without ground effect and at various wind tunnel velocities (Reynolds numbers), ride heights (ground clearances) and angles of attack. Data obtained in airfoil experiments include sectional forces and surface pressure data. Results are compared with the free-drive case and with published works. Data indicated that the pressure distribution increased at the upper and lower surfaces in ground proximity, at low angles of attack, and increased also with incidence. The negative lift coefficient increased with angle of attack except the angles of attack larger than 10o and with ground effects except at ride heights of less than 0.1c due to the force reduction phenomena. The drag coefficient increased with the ground effect which caused a decrease in the airfoil efficiency. The aerodynamic characteristics remain relatively an affected by the velocity change. The experimental data were compared with published works and showed good results.
References
- Mahon, S. and Zhang, X., ''computational analysis of inverted double-element airfoil in ground effect'', Journal of fluids engineering, ASME, 128(6):1172-1180, 2005.
- Cui, E.J. (1998), ''Surface effect aero-hydrodynamics and its applications''. Sadhana, 23(5), 569–577.
- Rozhdestvensky, K.V., (2006) Wing-in ground effect vehicles. Prog. Aerosp. Sci., 42, 211–283.
- Dominy, R. G., “Aerodynamics of Grand Prix cars”, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 206, pp. 267–274, 1992.
- Katz, J., “Considerations pertinent to race-car wing design,” RAeS. Conference on “Vehicle Aerodynamics”, Loughborogh, U.K., pp. 231–237, 1994.
- Knowles, K., Donoghue, D. T., and Finnis, M. V., 1994, “A Study of Wings in Ground Effect,” Proceedings of the Loughborough University Conference on Vehicle Aerodynamics, Vol. 22, pp. 1–13.
- Jasinski, W. J. and Selig, M. S., “Experimental study of open-wheel race-car front wings”, SAE 1998 Transaction–Journal of Passenger Cars, Vol. 107, Section 6, 1999.
- Zerihan, J.D.C. and Zhang, X., "Aerodynamics of a single element wing in ground effect," Journal of Aircraft, Vol. 6, 2000, pp. 1058-1064.
- Galoul, V. and Barber, T.J., '' A Study of an Inverted Wing with Endplates in Ground Effect", abstract p 1, 2007.
- Walter, D. J.," Study of Aerofoils at High Angle of Attack, in Ground Effect.", M.Sc. Thesis, School of Aerospace, Mechanical & Manufacturing Engineering Portfolio of Science, Engineering & Technology Rmit University, September 2007.
- Blackwell, T., "Subsonic Wind Tunnel with Corrections on a Wing with a Clark Y-14 Airfoil", Master's Thesis, San Jose State University, 2011.
- Hussain I. Y. and Ali A. H., “Calibration of Low-Speed Wind Tunnel (LSWT) Test Section”, Baghdad University Engineering Journal, Dossier No. ME-576, accepted at 22/6/2014.
- Moran J., “An Introduction to Theoretical and Computational Aerodynamics”, John Wiley and Sons Int., 1984.
- I. Y. Hussain and M.S. Abood, “Aerodynamic Characteristics of CLARK-Y Smoothed Inverted Wing with Ground Effects,” International Journal of Computer Applications (0975 – 8887), vol. 136, no. 7, pp. 42–50, 2016.
- Riegels, F.W., "Aerodynamic sections", P. 213-214, butterworths, London, (1961).
- Lyon, C. A., Broern, A. P., Giguore, P., Gopalarathnam, A. and Selig, M. S., "Summary of Low- Speed Airfoil Data", Vol.3. University of Illinois at Urbana-Champaign, (1995).
Index Terms
Keywords