Unsteady Flow Distortion Past Blades: Sources of Noise Generation in Rotating Flows

Abstract

General objectives include determination of flow structure at leading- and trailing-edges of blading in terms of velocity gradients representing pressure sources and employment of active and passive control techniques to manipulate crucial phase shifts of vorticity fields past blading. Design and implementation of experimental systems include generic, controlled systems for study of basic classes of leading- and trailing-edge interactions and a unique radial flow machine for simultaneous active control and flow visualization. Techniques for quantitative bubble and particle tracking via laser diagnostics were developed. Methods of evaluation of images via laser interrogation and approaches to two- and three-dimensional image construction are presented.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1991
Accession Number
ADA259715

Entities

People

  • C. Magness
  • D. O. Rockwell
  • J. Kuryla
  • J. Towfighi
  • Jeong‐Han Kim
  • L. Takmaz
  • O. Akin
  • O. Robinson
  • S. Konak

Organizations

  • Lehigh University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Broadband
  • Far Field
  • Flow
  • Flow Visualization
  • Frequency
  • Laser Diagnostics
  • Lasers
  • Leading Edges
  • Particles
  • Phase Shift
  • Radial Flow
  • Software Development
  • Stratified Fluids
  • Three Dimensional
  • Trailing Edges
  • Unsteady Flow

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Fluid Mechanics and Fluid Dynamics.
  • Systems Analysis and Design

Technology Areas

  • Directed Energy