Aerodynamic Entropy Generation Rate in a Boundary Layer With High Free Stream Turbulence

[+] Author and Article Information
Philip C. Griffin, Mark R. D. Davies

Stokes Research Institute, Department of Mechanical & Aeronautical Engineering, University of Limerick, Plassey Technological Park, Limerick, Republic of Ireland

J. Fluids Eng 126(4), 700-703 (Sep 10, 2004) (4 pages) doi:10.1115/1.1780170 History: Received June 27, 2002; Revised March 05, 2004; Online September 10, 2004

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Grahic Jump Location
Energy spectra of the fluctuating hot-wire and film voltage signals (analogous to u) at different wall-normal positions in the boundary layer for 5.7% SSL with Rec=76,000. (a) η=0.1, 5.0% FST; (b) η=0.4, 5.0% FST; (c) η>1, 5.0% FST; (d) η=0.4, 0.8% FST; (e) Wall, 5.0% FST; (f) η>1, 0.8% FST.
Grahic Jump Location
(a) Distribution of the dissipation coefficient Cd derived from measurements of Ṡgen at Rec=76,000 for both 0.8% and 5.0% FST. (b) The corresponding hot-film skewness distribution.
Grahic Jump Location
Comparison between measured boundary layer velocity profiles at 5.7% SSL, Rec=76,000 both turbulence levels, δ=500 μm, Uδ=15 m/s. Also shown is the distribution of percentage turbulence.
Grahic Jump Location
Measured suction surface pressure distribution (expressed as the pressure coefficient Cp) for Rec=76,000, for both 0.8% and 5.0% FST
Grahic Jump Location
Incompressible turbine cascade and hot-wire traverse assembly



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