NDLI: An investigation of the flow characteristics in the blade endwall corner region

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An investigation of the flow characteristics in the blade endwall corner region

Content Provider	NASA Technical Reports Server (NTRS)
Author	Raj, Rishi S. Hazarika, Birinchi K.
Copyright Year	1987
Description	Studies were undertaken to determine the structure of the flow in the blade end wall corner region simulated by attaching two uncambered airfoils on either side of a flat plate with a semicircular leading edge. Detailed measurements of the corner flow were obtained with conventional pressure probes, hot wire anemometry, and flow visualization. The mean velocity profiles and six components of the Reynolds stress tensor were obtained with an inclined single sensor hot wire probe whereas power spectra were obtained with a single sensor oriented normal to the flow. Three streamwise vortices were identified based on the surface streamlines, distortion of total pressure profiles, and variation of mean velocity components in the corner. A horseshoe vortex formed near the leading edge of the airfoil. Within a short distance downstream, a corner vortex was detected between the horseshoe vortex and the surfaces forming the corner. A third vortex was formed at the rear portion of the corner between the corner vortex and the surface of the flat plate. Turbulent shear stress and production of turbulence are negligibly small. A region of negative turbulent shear stress was also observed near the region of low turbulence intensity from the vicinity of the flat plate.
File Size	22690693
Page Count	291
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870019979
Archival Resource Key	ark:/13960/t8qc4x55n
Language	English
Publisher Date	1987-07-01
Access Restriction	Open
Subject Keyword	Aerodynamics Reynolds Stress Flat Plates Rotor Blades Turbomachinery Vorticity Wall Flow Shear Stress Flow Visualization Flow Characteristics Aircraft Design Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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