Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Wall Pressure Signatures Of Organized Turbulent Motions
Download Wall Pressure Signatures Of Organized Turbulent Motions full books in PDF, epub, and Kindle. Read online Wall Pressure Signatures Of Organized Turbulent Motions ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Wall Pressure Signatures of Organized Turbulent Motions by : Steven J. Russell
Download or read book Wall Pressure Signatures of Organized Turbulent Motions written by Steven J. Russell and published by . This book was released on 1997-07-01 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive database of simultaneously obtained wall pressure and velocity measurements was acquired for a high Reynolds number, equilibrium turbulent flow. These data were obtained in both streamwise and spanwise measurement planes using an array of wall pressure transducers. Analyses of these data were performed to examine the spatial extent and convective features of turbulence producing structures. Several signal processing techniques were shown to extract detailed structural features of the turbulent motions. These techniques included digital band pass filtering to discriminate between turbulent scales and a localized variance method for the detection of clusters of high frequency turbulent activity. Cross-spectral, cross-correlation, and conditional sampling methods applied to these data clearly show the dynamical relationships between coherent turbulent motions as well as their induced wall pressure signatures. Both pressure velocity correlation results and conditionally averaged maps of the flow field sampled on peak wall pressure events, reveal a consistent correlation between large scale motions and near- wall, small scale turbulent production activity. The large scale vortical motions (or shear layers) extend across the turbulent boundary layer and exhibit Reynolds stress (turbulent production) characteristics. These findings are consistent with many of the proposed conceptual models of organized motions.
Book Synopsis Wall Pressure Signatures of Organized Turbulent Motions by : Steven J. Russell
Download or read book Wall Pressure Signatures of Organized Turbulent Motions written by Steven J. Russell and published by . This book was released on 1997 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive database of simultaneously obtained wall pressure and velocity measurements was acquired for a high Reynolds number, equilibrium turbulent flow. These data were obtained in both streamwise and spanwise measurement planes using an array of wall pressure transducers. Analyses of these data were performed to examine the spatial extent and convective features of turbulence producing structures. Several signal processing techniques were shown to extract detailed structural features of the turbulent motions. These techniques included digital band-pass filtering to discriminate between turbulent scales and a localized variance method for the detection of clusters of high frequency turbulent activity. Cross-spectral, cross-correlation, and conditional sampling methods applied to these data clearly show the dynamical relationships between coherent turbulent motions as well as their induced wall pressure signatures. Both pressure-velocity correlation results and conditionally averaged maps of the flow field sampled on peak wall pressure events, reveal a consistent correlation between large scale motions and near-wall, small scale turbulent production activity. The large scale vortical motions (or shear layers) extend across the turbulent boundary layer and exhibit Reynolds stress (turbulent production) characteristics. These findings are consistent with many of the proposed conceptual models of organized motions.
Book Synopsis Instantaneous Velocity and Wall Pressure Features in a Turbulent Boundary Layer by :
Download or read book Instantaneous Velocity and Wall Pressure Features in a Turbulent Boundary Layer written by and published by . This book was released on 1997 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instantaneous organized motions in a turbulent boundary layer are related to characteristic wall pressure signatures for 1500
Book Synopsis Identification of Coherent Motions Using Wall Pressure Signatures by :
Download or read book Identification of Coherent Motions Using Wall Pressure Signatures written by and published by . This book was released on 1996 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large amplitude wall-pressure events observed beneath a turbulent boundary layer appear to be signatures of near-wall organized structures. Experimental investigations by the authors and their colleagues have provided strong support for this conjecture. This report contains results from new studies which attempt to identify the distinct structural features and spatial extent of the organized motions from observations of their wall pressure footprints. A database, which contains simultaneous measurements of wall-pressure, and stream-wise and wall-normal velocities at numerous locations across the boundary layer, was used in this investigation. These data are analyzed using signal processing techniques based on a trajectory mapping for the detection of coherent motions. The results show that the organized structures contain both ejection motions (accelerated events) that induce positive wall pressure events; and sweep motions (decelerated events) that induce negative wall pressure events. It is proposed that these structures collectively represent the organized motions. The present research activity is directed at the acquisition of a new database using an array of streamwise and spanwise transducers. By applying bandpass filtering techniques to the data, it is expected that the total pressure signature will become more evident.
Book Synopsis An Experimental Investigation of Organized Turbulent Motions and Wall-pressure Fluctuations in Complex Flows by : Mark E. Kammeyer
Download or read book An Experimental Investigation of Organized Turbulent Motions and Wall-pressure Fluctuations in Complex Flows written by Mark E. Kammeyer and published by . This book was released on 1995 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of Organized Turbulent Motions and Wall-pressure Fluctuations in Complex Flows by : Mark E. Kammeyer
Download or read book An Experimental Investigation of Organized Turbulent Motions and Wall-pressure Fluctuations in Complex Flows written by Mark E. Kammeyer and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer by : John S. Serafini
Download or read book Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer written by John S. Serafini and published by . This book was released on 1963 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This experimental study was carried out at a free-stream Mach number of 0.6 and a Reynolds number per foot of 3.45 x 106. The magnitudes of the wall-pressure fluctuations agree with the Lilley-Hodgson theoretical results. Space-time correlations of the wall-pressure fluctuations generally agree with Willmarth's results for longitudinal separation distances. The convection velocity of the fluctuations is found to increase with increasing separation distances, and its significance is explained. Measurements with the longitudinal component of the velocity fluctuations indicate that the contributions to the wall-pressure fluctuations are from two regions, an inner region near the wall and an outer region linked with the intermittency.
Book Synopsis Experimental Investigation of Flow-induced Cavity Resonance by : Paul Zoccola (Jr., J.)
Download or read book Experimental Investigation of Flow-induced Cavity Resonance written by Paul Zoccola (Jr., J.) and published by . This book was released on 2000 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Organized Turbulent Structures and Their Induced Wall Pressure Fluctuations by : Vincent Wilczynski
Download or read book Organized Turbulent Structures and Their Induced Wall Pressure Fluctuations written by Vincent Wilczynski and published by . This book was released on 1992 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Structure of Wall-bounded Turbulent Flows by :
Download or read book On the Structure of Wall-bounded Turbulent Flows written by and published by . This book was released on 1983 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Wavelet-Filtering Techniques to Intermittent Turbulent and Wall Pressure Events. Part 1. Exploratory Results by :
Download or read book Application of Wavelet-Filtering Techniques to Intermittent Turbulent and Wall Pressure Events. Part 1. Exploratory Results written by and published by . This book was released on 1994 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large amplitude wall-pressure events, observed beneath a turbulent boundary layer, appear to be the signatures of intermittent organized motions within the turbulent flow. The temporal localization of these events could be applied to the active control of turbulent wall flows. This report presents preliminary results on utilizing time-frequency localization techniques (wavelet transforms) for the detection of these events. The advantage of these methods is that they do not require a priori assumptions regarding the features of the signal. A tutorial overview of these techniques is first presented. This is followed by a discussion of some exploratory results obtained from the application of wavelet filtering to wall pressure and turbulent temporal records acquired from wind tunnel experiments. Wavelet filtering, Wall-pressure fluctuations, Turbulence time-frequency localization, Conditional sampling.
Book Synopsis Simulation of Turbulent Wall Pressure by : Robert L. Ash
Download or read book Simulation of Turbulent Wall Pressure written by Robert L. Ash and published by . This book was released on 1978 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the ASME Noise Control and Acoustics Division by :
Download or read book Proceedings of the ASME Noise Control and Acoustics Division written by and published by . This book was released on 2001 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Wavelet-Filtering Techniques to Intermittent Turbulent and Wall Pressure Events. Part 2. Detection of Cluster Patterns by :
Download or read book Application of Wavelet-Filtering Techniques to Intermittent Turbulent and Wall Pressure Events. Part 2. Detection of Cluster Patterns written by and published by . This book was released on 1995 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large amplitude wall-pressure events, observed beneath a turbulent boundary layer, appear to be signatures of intermittent organized motions within the turbulent flow. Experimental studies were made investigating this relationship. Part 1 presented the first phase of this investigation and reported on the results of utilizing time-frequency localization techniques (wavelet transforms) for the detection of these events. The application of wavelet filtering for the analyses of turbulent data was introduced. This report presents the results of the second phase of the investigation. A wavelet filter was selected based on maintaining the integrity of intermittent near wall burst events. The correlations between individual turbulent flow and wall-pressure events were confirmed using both the original time records and the generated VITA function time records. A Localized Windowed Peak Detection algorithm was developed that detects the groupings of these events. The algorithm detects the temporal locations and durations of the clusters. Correlation and conditional sampling methods were then used to postulate the sequential burst events contained within the individual clusters. Conditional sampling showed a bi-directional relationship between positive wall-pressure events and burst ejections in the near-wall region. (AN).
Book Synopsis Proceedings of the International Symposium on Seawater Drag Reduction by :
Download or read book Proceedings of the International Symposium on Seawater Drag Reduction written by and published by . This book was released on 1998 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Active Control of Vibration and Noise by : K. W. Wang
Download or read book Active Control of Vibration and Noise written by K. W. Wang and published by . This book was released on 1994 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
