Investigation of Boundary-Layer Control to Improve the Lift and Drag Characteristics of the NACA 652-415 Airfoil Section with Double Slotted and Plain Flaps

Abstract

A two-dimensional wind-tunnel investigation has been made of the relative effectiveness of two methods of boundary-layer control in increasing the maximum lift coefficient of an NACA airfoil section. Boundary-layer suction was applied at the percent-chord station of the airfoil equipped with a louble slotted flap and in the vicinity of the hinge line of the airfoil with a deflected plain flap. The investigation also included the determination of the effectiveness of small deflections of the plain flap in conjunction with suction at the hinge line and of suction at the percent -chord station of the airfoil with the double slotted flap retracted as a means of reducing the drag.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1950
Accession Number
ADA380475

Entities

People

  • Elmer A. Horton
  • Nicholas J. Paradiso
  • Stanley F. Racisz

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airfoils
  • Airplanes
  • Aspect Ratio
  • Boundary Layer
  • Boundary Layer Control
  • Flow
  • Free Stream
  • High Lift
  • High Lift Devices
  • Leading Edges
  • Measurement
  • Reynolds Number
  • Slotted Flaps
  • Suction Slots
  • Surface Properties
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.