Download or read book Sensitivity to Mean Flow Parameters of the Low Wavenumber Content of the Wall Pressure Under a Turbulent Boundary Layer written by J. E Cole (III.) and published by . This book was released on 1985 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to examine the sensitivity of the low wavenumber portion of the wall pressure field under a turbulent boundary layer to both flow and wall conditions. The analytical procedure makes use of a method for calculating the broadband correlation function of the wall pressure field in which the specific flow characteristics enter through profiles of the mean velocity shear and turbulence intensity across the boundary layer. The basic assumption used to extend the results of this procedure to narrowband frequency characteristics is that there is a range of large spatial separations in which Strouhal scaling is not important. Several specific boundary layers are considered including flows on smooth and rough walls and in zero, favorable, and adverse pressure gradients. Results are presented for the point pressure, the spatial correlation function, and the low wavenumber spectral level. Keywords: GHR(General Hydromechanics Research) program; Wall pressure fluctuations; Low Wavenumber.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low wavenumber Content of the Spectrum of the Wall Pressure Under a Turbulent Boundary Layer written by K. L. Chandiramani and published by . This book was released on 1968 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report deals with the low-wavenumber content of the wall-pressure spectrum under a turbulent boundary layer. A discussion is given of the importance of the low-wavenumber content for evaluating transducer attenuation. Comments are made on the lack of reliable experimental data regarding the low-wavenumber content. Calculations are presented to substantiate the above comments. Direct experimental measurements of the low-wavenumber content are reported. (Author).
Download or read book Direct Measurements of Turbulent Boundary Layer Wall Pressure Wavenumber frequency Spectra on Smooth and Riblet coated Plates written by Bruce M. Abraham and published by . This book was released on 2000 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1985 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low wavenumber Content of the Spectrum of the Wall Pressure Under a Turblent Boundary Layer written by Bolt, Beranek, and Newman and published by . This book was released on 1968 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low wavenumber Turbulent Boundary Layer Wall pressure Measurements from Vibration Data Over Smooth and Rough Surfaces in Pipe Flow written by Neal D. Evans and published by . This book was released on 2011 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Wavenumber Turbulent Boundary Layer Wall Pressure and Shear Stress Measurements from Vibration Data on a Cylinder in Pipe Flow written by William K. Bonness and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Wavenumber Levels of Turbulent Boundary Layer Wall Pressure Fluctuations in Zero and Adverse Gradients written by Mark Jay Moeller and published by . This book was released on 1978 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Wavenumber Levels of Turbulent Boundary Layer Wall Pressure Fluctuations in Zero and Adverse Gradients written by Mark Jay Moeller and published by . This book was released on 1978 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: The low wavenumber components of the turbulent boundary layer wavenumber frequency spectrum of wall pressure fluctuations were measured with two flush-mounted rectangular plates having approximately clamped boundary conditions. The plates were designed to provide low wavenumber measurements at higher frequencies and wavenumbers than previous plate experiments in order to provide data comparable with measurements made by Farabee and Geib (7) with an array of flush-mounted microphones. The low wavenumber measurements were made in the M.I.T. low noise low turbulence subsonic wind tunnel under zero and adverse pressure gradient conditions. When nondimensionalized on outer boundary layer variables the adverse pressure gradient data do not exhibit increased levels from those of the zero pressure gradient data. The zero pressure gradient data are in good agreement with the levels reported by Farabeen and Geib (7) for the same nondimensional frequency and wavenumber range. (Author).
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of Techniques to Measure the Low Wavenumber Wall Pressure Spectrum of a Turbulent Boundary Layer written by Kyle F. Martini and published by . This book was released on 1984 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The agreement between low wavenumber measurements of the turbulent wall pressure spectrum by various investigators has not been too good. Different techniques have been used in different facilities and have yielded data in different nondimensional frequency and wavenumber ranges. The current measurement program has utilized the wavenumber filtering techniques used by three primary investigators, the Martin plate, the Jameson plate and the Farabee and Geib 6-element microphone array in the same facility. Also a 12-element collinear and stagger array and a lateral array were used. The agreement between the different techniques in the M.I.T. facility is generally good. In addition, the difference of results between facilities has been reduced by displaying the data in a non-dimensional form that does not include the effect of boundary layer thickness. However, there was still a significant scatter in the data for each technique. Scatter is believed to be due to variation of each filter's wavenumber response away from the main acceptance lobe where the filter is responding to the acoustic and convective contamination and also the variation of the contamination with flow speed.
Download or read book Proceedings of the International Instrumentation Symposium written by and published by . This book was released on 1980 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of Near Wall Flow Parameters in the Blade End wall Corner Region written by Rakesh K. Bhargava and published by . This book was released on 1989 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1971 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Review of Turbulence Measurements in Compressible Flow written by Virgil A. Sandborn and published by . This book was released on 1974 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Reynolds number Turbulent Boundary Layers written by Lincoln Paul Erm and published by . This book was released on 1988 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
