Influence of main and outer wings on aerodynamic characteristics of compound wing-in-ground effect

Tavakoli Dakhrabadi, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ast.2016.06.002
  3. Publisher: Elsevier Masson SAS
  4. Abstract:
  5. A practical mathematical model with low computational time and good accuracy is applied to investigate theaerodynamic characteristics and static height stability of the compound wing-in-ground effect (WIG). The compound WIG consists of a main wing with low aspect ratio and an endplate, and anouter wing with high aspect ratio. To validate the present mathematical model, a numerical simulation is performed so thatnumerical results had a good agreement with the experimental data. The analysis shows that the main wing is useful in the extreme ground effect zone and the outer wing enhances performance of the compound WIG in the weak ground effect zone. In order to satisfy the static height stability of the compound WIG it isevaluated by Irodov's criterion. Influence of junction position of outer wing on the main wing is investigated on the static height stability of compound WIG. Acomparison of Irodov's criterion shows that static height stability improves with moving the outer wing position backward into the trailing edge of the main wing and this ledto a decrease in the tail area. The proposed mathematical model could be appropriate for aerodynamic optimization of WIG crafts with the compound wing
  6. Keywords:
  7. Endplate ; Ground effect ; Static height stability ; Aerodynamic stability ; Aerodynamics ; Aspect ratio ; Stability ; Aerodynamic characteristics ; Aerodynamic optimization ; Compound WIG ; Computational time ; High aspect ratio ; Low aspect ratio ; Wing in ground effect ; Low aspect ratio wings
  8. Source: Aerospace Science and Technology ; Volume 55 , 2016 , Pages 177-188 ; 12709638 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1270963816302115