Particle Image Velocimetry (PIV) Measurements in the Wake of a Cascade of Compressor Blades at Stall

Abstract

The flow around second generation controlled-diffusion compressor blades in cascade at stall was examined through the use of a Particle Image Velocimeter (PIV). This examination was conducted from the trailing edge of the blade well into the wake region. Flow visualization techniques were used to observe and record the behavior of the region of flow separation. The PIV data showed that the separated regions continued to grow up to approximately 10% of blade chord length past the trailing edge. Past this point, these areas began to show signs of becoming entrained in the free stream. The flow visualization highlighted the extent of the backflow. The PIV measurements documented the velocity profiles within the wake region.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2006
Accession Number
ADA445547

Entities

People

  • Robert C. Quesenbury Jr.

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Backflow
  • Boundary Layer
  • Computational Fluid Dynamics
  • Data Acquisition
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Free Stream
  • Measurement
  • Pressure Distribution
  • Test Facilities
  • Trailing Edges
  • Turbines
  • Turbomachinery
  • Two Dimensional
  • Wind Tunnels

Readers

  • Aerodynamics.
  • Fluid Dynamics.