Recent developments in delta wing aerodynamics

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53 Citations (Scopus)

Abstract

Recent developments in delta wing aerodynamics are reviewed. For slender delta wings, recent investigations shed more light on the unsteady aspects of shear-layer structure, vortex core, breakdown and its instabilities. For nonslender delta wings, substantial differences in the structure of vortical flow and breakdown may exist. Vortex interactions are generic to both slender and nonslender wings. Various unsteady flow phenomena may cause buffeting of wings and fins, however, vortex breakdown, vortex shedding, and shear layer reattachment are the most dominant sources. Dynamic response of vortex breakdown over delta wings in unsteady flows can be characterised by large time lags and hysteresis, whose physical mechanisms need further studies. Unusual flow-structure interactions for nonslender wings in the form of self-excited roll oscillations have been observed. Recent experiments showed that substantial lift enhancement is possible on a flexible delta wing.
Original languageEnglish
Pages (from-to)437-452
Number of pages16
JournalAeronautical Journal
Volume108
Issue number1087
Publication statusPublished - 2004

Keywords

  • Shear flow
  • Supersonic aerodynamics
  • Computer simulation
  • Viscosity
  • Flow interactions
  • Aerospace vehicles
  • Delta wing aircraft
  • Vortex shedding
  • Reynolds number
  • Hysteresis
  • Flow visualization
  • Axial flow

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