Supersonic Chordwise Bending Flutter in Cascades

Abstract

This report documents the results of an experimental program to study the phenomenon of chordwise bending flutter. An extensive series of vibration bench tests, using both prototype blades and the actual J-blade hardware, resulted in the choice of the first bending mode of a fully double-cantilevered configuration as the chordwise bending mode to be tested. Alterations in both method of blade attachment and in the blade geometry itself were introduced to improve the desired mode shape and frequency. The vibration bench tests were carried out in conjunction with NASTRAN predictions and supersonic cascade aerodynamic computations. Comparisons between theory and experiment are discussed.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1975
Accession Number
ADA035678

Entities

People

  • A. O. St. Hilaire
  • F. O. Carta
  • R. A. Arnoldi
  • W. N. Dalton Iii

Organizations

  • Pratt & Whitney

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Attachment
  • Back Pressure
  • Bench Tests
  • Boundary Layer
  • Compressors
  • Dynamic Response
  • Fluid Dynamics
  • Frequency
  • Frequency Response
  • Geometry
  • Mach Number
  • Pressure Distribution
  • Research Facilities
  • Resonant Frequency
  • Turbines
  • Vibration
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aerospace Test and Evaluation
  • Structural Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow