Effect of Reduced Frequency on Longitudinal Oscillatory Derivatives of an Airfoil Based on Wind Tunnel Data

Abstract:

Longitudinal dynamic derivatives of an airfoil oscillating in pitching and plunging motions were calculated using variation of pitching moment coefficients with angle of attack in various conditions, based on wind tunnel data. The effect of reduced frequency on variation of longitudinal oscillatory derivatives was investigated, in three different regions of oscillation: before, over and post stall conditions. The results showed that reduced frequency has significant effects on longitudinal oscillatory coefficients in different conditions for both types of oscillations.

• Periodical: Advanced Materials Research (Volume 1016)
• Pages: 465-470
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1016.465
• Online since: August 2014
• Authors: F. Rasi Marzabadi*, Ramin Kamali Moghadam
• Keywords: Airfoil, Longitudinal Oscillatory Derivative, Pitching, Plunging, Wind Tunnel

References

[1] R. D. Kimberlin, Flight testing of fixed-wing aircraft, AIAA Educational Series, Reston, Virginia, USA, (2003).

[2] J. B., Barlow, H. R., William, and A., Pope Low-Speed Wind Tunnel Testing, Third Edition, John Wiley & Sons, Inc., (1999).

[3] J. E. Williams, and S. R., Vukelich, The USAF stability and control digital DATCOM, McDonnell Douglas Astona UTICS Company, (1979) AFFDL-TR-79-3032.

[4] S.H., Park, Y., Kim, and J. H., Kwon, Prediction of damping coefficients using the unsteady Euler equations, Journal of Spacecraft and Rockets, Vol. 40, No. 3 (2003).

DOI: 10.2514/2.3970

[5] V., Klein, P. C., Murphy, M. T., Curry, and J. M., Brandon, Analysis of wind tunnel longitudinal static and oscillatory data of the F-16XL aircraft, NASA/TM-97-206276 (1997).

[6] F.O., Carta, A comparison of the pitching and plunging response of an oscillating airfoil, NASA Report 3172 (1979).

[7] C., Tyler, Joseph, and J. Gordon, Leishman, Analysis of pitch and plunge effects on unsteady airfoil behavior, Presented at the 47th Annual Forum of the American Helicopter Society (1991).

DOI: 10.4050/jahs.37.69

[8] L.E., Ericsson, J.P., Reding, Dynamic stall simulation problems, Journal of Aircraft, Vol. 8, (1971) pp.579-583.

DOI: 10.2514/3.59140

[9] M.R., Soltani, and F., Rasi Marzabadi, Effect of plunging amplitude on the performance of a wind turbine blade section, The Aeronautical Journal, Vol. 111 No. 1123, (2007) pp.571-587.

DOI: 10.1017/s0001924000001846

[10] M.R., Soltani, and F., Rasi Marzabadi, Effect of reduced frequency on the aerodynamic behavior of an airfoil oscillating in a plunging motion, Journal of Scientica Iranica, Vol. 16, No. 1, (2009).

DOI: 10.2514/6.2007-77

[11] M.R., Soltani, M., Seddighi, and F., Rasi Marzabadi, Comparison of pitching and plunging effects on the surface pressure variation of a wind turbine blade section, Journal of Wind Energy, DOI: 10. 1002/we. 286 (2008).

DOI: 10.1002/we.286

[12] L.E., Ericson, Moving wall effects on dynamic stall can be large-fact or fiction, AIAA-91-0430, 29th Aerospace Sciences Meeting, Reno, Nevada (1991).

DOI: 10.2514/6.1991-430

[13] M. R., Visbal, High-fidelity simulation of transitional flows past a plunging airfoil, AIAA Journal, Vol. 47, No. 11, (2009) pp.2685-2697.

DOI: 10.2514/1.43038