ON THE EFFECT OF A SWEPT-WING-PLATE JUNCTION FLOW ON THE LIFT AND DRAG

Measurements have been made of the surface pressure distributions in the region of the junction between an untapered wing of NACA 0015 section swept back at 20o, and a flat plate on which a turbulent boundary layer had developed, for several values of wing incidence. It is shown that the section lift coefficient of the wing diminishes, while the pressure drag coefficient increases, as the junction is approached. Oil-flow visualisations on the plate surface show the passage of the horseshoe-like vortex which forms when the retarded boundary layer flow separates as it approaches the leading- edge of the junction. Kinks in the isobars on the plat correlate with the trailing "legs" of this vortex. The surface flow visualisations also show that the turbulence in the junction region spreads onto the wing from the leading edge at an angle of about 10o.

  • Supplemental Notes:
    • Aeronautical J, v 99 n 987, Aug/Sept 1995, p 293 [13 p, 34 ref, 2 tab, 14 fig]
  • Authors:
    • BERNSTEIN, L
    • Hamid, S
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00727780
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM