REDUCING AERODYNAMIC RESISTANCE HOLES WITH ANNULAR RIBS AND RECESSES

Abstract

The article describes means of reducing the aerodynamic resistance of holes with annular ribs and recesses. One way is to make the edge of the opening turned toward the stream rounded. The principle of action of annular fins and recesses are explained and their optimum geometrical dimensions at which input resistance becomes minimum are revealed. Experimental installations and testing methods are described. Test results with both annular fin and annular recess are given and discussed.

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Document Details

Document Type
Technical Report
Publication Date
Dec 23, 1966
Accession Number
AD0660433

Entities

People

  • K. I. Khanzhonkov

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accumulators
  • Air Flow
  • Coefficients
  • Compression
  • Diameters
  • Dynamic Pressure
  • Flow
  • Fluid Flow
  • Friction
  • Gas Flow
  • Pipes
  • Pitot Tubes
  • Pressure Gages
  • Resistance
  • Static Pressure
  • Translations
  • Turbulent Flow

Readers

  • Combustion and Flow Dynamics.