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Surface pressure variation on an airfoil in plunging and pitching motions

Soltani, M. R ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. Publisher: 2006
  3. Abstract:
  4. Unsteady aerodynamic experiments were conducted on an oscillating airfoil in a subsonic wind tunnel. The model was oscillated in two types of motion, pitch and plunge, at a range of reduced frequencies, k=0.029-0.1. In addition, steady data were acquired and examined to furnish a baseline for analysis and comparison. The unsteady surface pressure is measured along the chord for both upper and lower surfaces of the model. Particular emphases were placed on the effects of different types of motion on the unsteady pressure distribution of the airfoil at pre-stall, near stall, and post stall conditions. It was found that the variations of the pressure distribution with angle of attack have strong sensitivity to the displacement, oscillating frequency and mean angles of attack. The width of the hysteresis loop, position of the "figure 8 shape" and slope of the pressure coefficient curve have been influenced by both types of motion, pitch and plunge
  5. Keywords:
  6. Oscillating frequencies ; Pitching ; Plunging ; Pressure coefficients ; Reduced frequency ; Unsteady ; Unsteady aerodynamics ; Unsteady pressure distribution ; Angle of attack ; Pressure distribution ; Sensitivity analysis ; Wind tunnels ; Airfoils
  7. Source: 25th Congress of the International Council of the Aeronautical Sciences 2006, Hamburg, 3 September 2006 through 8 September 2006 ; Volume 2 , 2006 , Pages 962-971 ; 9781604232271 (ISBN)
  8. URL: https://www.researchgate.net/publication/332332994_Surface_Pressure_Study_of_an_Airfoil_Undergoing_Combined_Pitch_and_Low-Amplitude_Plunge_Motions