Aerodynamics of Cascaded Airfoils Oscillating or Subject to Three-Dimensional Periodic Gusts.

Abstract

Three problems which have been investigated are discussed in this report. Aerodynamic theory and computational procedures have been developed to study the aeroelastic stability of oscillating loaded airfoils in cascade with interblade phase angle. Contrary to linear theory, results show that classical flutter can occur for low speed turbine cascades operating at typical design conditions. Ground effects on fan inlet flows were investigated based on data from NASA - Lewis. The analysis showed that swirling flows are the dominant source of flow disturbances entering the fan. Finally, a study was made of three-dimensional periodic disturbances acting upon loaded airfoils in cascade. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1980
Accession Number
ADA111935

Entities

People

  • H. Atassi

Organizations

  • University of Notre Dame

Tags

Communities of Interest

  • Air Platforms
  • Human Systems
  • Space

DTIC Thesaurus Topics

  • Aeroelasticity
  • Eddies (Fluid Mechanics)
  • Engineering
  • Fluid Dynamics
  • Fluid Mechanics
  • Geometry
  • Ground Effect
  • Mach Number
  • Mechanical Engineering
  • Mechanical Properties
  • Physics Laboratories
  • Pressure Distribution
  • Three Dimensional
  • Turbine Blades
  • Turbines
  • Two Dimensional
  • Unsteady Aerodynamics

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.