Numerical Study of the Trailing Vortex of a Wing with Wing-Tip Blowing
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Numerical Study of the Trailing Vortex of a Wing with Wing-Tip Blowing

Numerical Study of the Trailing Vortex of a Wing with Wing-Tip Blowing


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About the Book

Trailing vortices generated by lifting surfaces such as helicopter rotor blades, ship propellers, fixed wings, and canard control surfaces are known to be the source of noise, vibration, cavitation, degradation of performance, and other hazardous problems. Controlling these vortices is, therefore, of practical interest. The formation and behavior of the trailing vortices are studied in the present research. In addition, wing-tip blowing concepts employing axial blowing and spanwise blowing are studied to determine their effectiveness in controlling these vortices and their effects on the performance of the wing. The 3D, unsteady, thin-layer compressible Navier-Stokes equations are solved using a time-accurate, implicit, finite difference scheme that employs LU-ADI factorization. The wing-tip blowing is simulated using the actuator plane concept, thereby, not requiring resolution of the jet slot geometry. Furthermore, the solution blanking feature of the chimera scheme is used to simplify the parametric study procedure for the wing-tip blowing. Computed results are shown to compare favorably with experimental measurements. It is found that axial wing-tip blowing, although delaying the rolling-up of the trailing vortices and the near-field behavior of the flowfield, does not dissipate the circulation strength of the trailing vortex farther downstream. Spanwise wing-tip blowing has the effect of displacing the trailing vortices outboard and upward. The increased 'wing-span' due to the spanwise wing-tip blowing has the effect of lift augmentation on the wing and the strengthening of the trailing vortices. Secondary trailing vortices are created at high spanwise wing-tip blowing intensities. Lim, Hock-Bin Unspecified Center BLOWING; COMPUTERIZED SIMULATION; CONTROL SURFACES; FINITE DIFFERENCE THEORY; LIFT AUGMENTATION; NAVIER-STOKES EQUATION; ROTARY WINGS; ROTOR BLADES; SPANWISE BLOWING; VORTICES; WINGS; CANARD CONFIGURATIONS; CAVITATION FLOW; DIFFERENCE EQUATIONS; DISSI...


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Product Details
  • ISBN-13: 9781723239106
  • Publisher: Createspace Independent Publishing Platform
  • Publisher Imprint: Createspace Independent Publishing Platform
  • Height: 279 mm
  • No of Pages: 162
  • Spine Width: 9 mm
  • Width: 216 mm
  • ISBN-10: 1723239100
  • Publisher Date: 18 Jul 2018
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 390 gr


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