Download or read book Generation of Atmospheric Turbulence in a Wind Tunnel written by Elena Muñiz Pladellorens and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report aims to contribute to the knowledge and characterization of grid generated turbulence in a wind tunnel. It starts with a theory introduction to turbulence where we bring together the classic approaches (Richardson-Kolmogorov equilibrium cascade) and more recent research. The latter includes the nonequilibrium dissipation law developed by [Valente and Vassilicos, 2011] and calculus methods such as set forth by [Puga and LaRue, 2017]. The study is based on two grids: an active grid in two different modes (open and random) and a regular and irregular passive grids. In terms of the means employed, the data is gathered using a hot-wire anemometer which makes it possible to have a high time resolution even though only one point and 1D turbulence is collected. In addition, the software used in the mathematical processing is MATLAB. The crucial parameters analyzed are the variations, the lengthscales (as well as their interaction) and dissipation rate constants, both equilibrium and nonequilibrium definitions. Some significant results have been found. In the first place Kolmogorov hypotheses are justified to hold true. Furthermore, there are some signs that the nonequilibrium law seems a plausible answer to some instabilities perceived. Finally, the vertical profiles of the irregular grid clearly show that the turbulence generated is inhomogeneous, which ushers in new lines of investigation.
Download or read book An Ejector driven Wind Tunnel for the Generation of Turbulent Flows with Arbitrary Mean Velocity Profile written by H. W. Teunissen and published by . This book was released on 1969 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new concept for creating turbulence in a wind tunnel was investigated. This concept involves the use of an array of jets to drive an open-circuit wind tunnel on the ejector principle, with the turbulence being created by the shear resulting from the difference in the velocities of the primary air and the entrained flow. A scale model tunnel was constructed, and the flow velocities obtained in it were compared with the predictions of simple ejector theory. Through the control of the velocities of the individual jets in the array, both uniform and shear flows were created, and the turbulence produced in each type of flow was studied. The concept was found to be a successful one, in that useful turbulence can be produced in both the uniform and shear flows. A fairly large range of both scales and intensities of turbulence was achieved. In addition, the results show that flow profiles in a tunnel of this type could be tailored to simulate those of any portion of a boundary layer through the control of the individual jet velocities. The effectiveness of a variable-angle diffuser at the downstream end of the tunnel in controlling mean flow velocities and turbulence characteristics was also investigated. (Author).
Download or read book The Effects of Forward Speed on Fan Inlet Turbulence and Its Relation to Tone Noise Generation written by and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Dispersion in Atmospheric Shear Flow and Its Wind Tunnel Simulation written by D. J. Wilson and published by . This book was released on 1971 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind Tunnel Turbulence Generation written by Filiberto Santiago Lizardi and published by . This book was released on 1989 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress in Turbulence X written by Ramis Örlü and published by Springer Nature. This book was released on with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind Tunnel for the Study of Turbulence in the Atmospheric Surface Layer written by Jack E. Cermak and published by . This book was released on 1956 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind Tunnel for the Study of Turbulence in the Atmospheric Surface Layer written by Jack E. Cermak and published by . This book was released on 1958 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind Tunnels and Experimental Fluid Dynamics Research written by Jorge Colman Lerner and published by BoD – Books on Demand. This book was released on 2011-07-27 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Wind Tunnels and Experimental Fluid Dynamics Research" is comprised of 33 chapters divided in five sections. The first 12 chapters discuss wind tunnel facilities and experiments in incompressible flow, while the next seven chapters deal with building dynamics, flow control and fluid mechanics. Third section of the book is dedicated to chapters discussing aerodynamic field measurements and real full scale analysis (chapters 20-22). Chapters in the last two sections deal with turbulent structure analysis (chapters 23-25) and wind tunnels in compressible flow (chapters 26-33). Contributions from a large number of international experts make this publication a highly valuable resource in wind tunnels and fluid dynamics field of research.
Download or read book Generation of Wind Tunnel Flow written by V. Kr Shárán and published by . This book was released on 1973 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulence Measurements and Flow Modeling written by Ching Jen Chen and published by CRC Press. This book was released on 1987 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric Turbulence written by Joseph Kampé de Fériet and published by . This book was released on 1951 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulence Measurements and Noise Generation in a Transonic Cryogenic Wind Tunnel written by Dwaine O. Griffith and published by . This book was released on 1989 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Wind Tunnel Studies and Simulations of Turbulent Shear Flows Related to Atmospheric Science and Associated Technologies written by Jack E. Cermak and published by . This book was released on 1968 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of accomplishments is given of both an experimental and analytical nature in the following specific studies: (1) Airflow in simulated temperate and tropical forest canopy. (2) Methods of modeling diffusion tests ahead of time to design most efficient and economical field experiments. (3) Use of controlled models of field tests to extend empirical data on CB transport and diffusion. (4) Extend wind tunnel investigation to thermally stratified boundary layers and broader ranges of surface roughness. (5) Investigation of longitudinal dispersion through both shear flow and turbulence. (6) Extend the Lagrangian similarity hypothesis considering a more realistic probability function. (7) Model Dugway Proving Ground and study mean wind patterns near the ground when flow aloft is oriented SW-SE. (Author).
Download or read book Wind Energy Utilization written by University of New Mexico. Technology Application Center and published by . This book was released on 1975 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind tunnel Measurements in the Wake of a Simple Structure in a Simulated Atmospheric Flow written by A. C. Hansen and published by . This book was released on 1975 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
