Cold Flow Turbulence Measurements in a Taylor-Couette Apparatus
Author: Noah Fehrenbacher
Publisher:
Published: 2005
Total Pages: 130
ISBN-13:
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Author: Noah Fehrenbacher
Publisher:
Published: 2005
Total Pages: 130
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DOWNLOAD EBOOKAuthor: Ei Sun OH
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Published: 2000
Total Pages: 146
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DOWNLOAD EBOOKAuthor: Amir Massoud Arjomand-Kermani
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Published: 2006
Total Pages: 106
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DOWNLOAD EBOOKAuthor: Margaret Elizabeth Solomon
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Published: 1995
Total Pages: 332
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DOWNLOAD EBOOKAuthor: Vahid Vaezi
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Published: 2000
Total Pages: 310
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DOWNLOAD EBOOKAuthor: F. Schultz-Grunow
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Published: 1961
Total Pages: 24
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Published: 1994
Total Pages: 892
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DOWNLOAD EBOOKAuthor: T. W. Jackson
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Published: 1983
Total Pages: 12
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Publisher:
Published: 1994
Total Pages: 115
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DOWNLOAD EBOOKThe effect of a favorable pressure gradient on the turbulent flow structure in a Mach 2.9 boundary layer (Re/m approx. 1.5 x 10(exp 7)) is investigated experimentally. Conventional flow and hot film measurements of turbulent fluctuation properties have been made upstream of and along an expansion ramp. Upstream measurements were taken in a zero pressure gradient boundary layer 44 cm from the nozzle throat in a 6.35 cm square test section. Measurements are obtained in the boundary layer, above the expansion ramp, 71.5 cm from the nozzle throat. Mean flow and turbulent flow characteristics are measured in all three dimensions. Comparisons are made between data obtained using single and multiple-overheat cross-wire anemometry as well as conventional mean flow probes. Conventional flow measurements were taken using a Pitot probe and a 10 degree cone static probe. Flow visualization was conducted via imaging techniques (Schlieren and shadowgraph photographs). Results suggest that compressibility effects, as seen through the density fluctuations in the Reynolds shear stress are roughly 10% relative to the mean velocity and are large relative to the velocity fluctuations. This is also observed in the total Reynolds shear stress; compressibility accounts for 50 - 75% of the total shear. This is particularly true in the favorable pressure gradient region, where though the peak fluctuation intensities are diminished, the streamwise component of the mean flow is larger, hence the contribution of the compressibility term is significant in the Reynolds shear.
Author: Edward Bruce Daffan
Publisher:
Published: 1976
Total Pages: 160
ISBN-13:
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