Effect of a Shear Layer on the Stability of an Axisymmetric External Compression Air Intake,

Abstract

This paper presents the effect of six shear layers with strength ranging from 5-11% entering the lip in various positions on the stability of a variable center cone external compression air intake under the condition of a M 1.72 incident stream. It was experimentally proven that a shear layer below 10% in strength entering the axisymmetric intake near the lip did not cause boundary layer preparation inside the intake cowl. A shear layer up to 11% in strength could enter the intake duct in any position at its entrance without causing buzz. The literature shows a shear layer with 6 to 7% strength can lead to a buzz in a two-dimensional air intake. Thereby, it was demonstrated that an axisymmetric intake duct has a higher resistance to buzz caused by the shear layer.

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Document Details

Document Type
Technical Report
Publication Date
Oct 21, 1985
Accession Number
ADA190622

Entities

People

  • Peng Chenyi
  • Yu. Shaozhi
  • Zhang Kunyuan

Organizations

  • National Air and Space Intelligence Center

Tags

DTIC Thesaurus Topics

  • Air Intakes
  • Axisymmetric
  • Boundaries
  • Boundary Layer
  • Dynamic Pressure
  • Electrical Equipment
  • Flow
  • Foreign Technology
  • Layers
  • Mach Number
  • Pressure Transducers
  • Shear Flow
  • Shock Waves
  • Static Pressure
  • Turbulent Mixing
  • Two Dimensional
  • Unsteady Flow

Readers

  • Combustion and Flow Dynamics.
  • Mechanical Engineering/Mechanics of Materials.