NDLI: Structure of Turbulence Around the Trailing Edge of a Rotor Blade

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Soranna, Francesco Chow, Yi-Chih Uzol, Oguz Katz, Joseph
Copyright Year	2007
Abstract	This paper focuses on the structure of turbulence around the trailing edge of a rotor blade operating behind a row of Inlet Guide Vanes (IGVs) located upstream of the rotor. High resolution, two-dimensional Particle Image Velocimetry (PIV) measurements are conducted in a refractive index matched turbomachinery facility that provides unobstructed view of the entire flow field. We focus on a small region around the rotor blade trailing edge, extending from 0.04c upstream of the trailing edge to about 0.1c downstream of it, c being the blade chord length. We examine the phase dependent distribution of turbulent kinetic energy (TKE) and its in-plane components of production rate. Impingement of an IGV wake on the suction surface of a rotor blade, near the trailing edge region, reduces the thickness of the boundary layer within the region impinged by the wake. The resulting increase in phase averaged shear strain rate increases the production rate and causes a striking increase in peak turbulent kinetic energy in the near wake. Streamwise velocity gradients, i.e. compression, also contribute to turbulence production, especially when the boundary layer at trailing edge is relatively thick, i.e. when it is not impinged by the IGV wake.
Sponsorship	Fluids Engineering Division
Starting Page	985
Ending Page	998
Page Count	14
File Format	PDF
ISBN	0791842894
DOI	10.1115/FEDSM2007-37573
e-ISBN	0791838056
Volume Number	Volume 2: Fora, Parts A and B
Conference Proceedings	ASME/JSME 2007 5th Joint Fluids Engineering Conference
Language	English
Publisher Date	2007-07-30
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Suction Turbulence Compression Blades Rotors Refractive index Turbomachinery Flow (dynamics) Particulate matter Chords (trusses) Wakes Inlet guide vanes Resolution (optics) Kinetic energy Shear (mechanics) Boundary layers
Content Type	Text
Resource Type	Article

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