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Instabilities In Near Field Of Turbulent Jets And Their Dependence On Intitial Conditions And Reynolds Number
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Book Synopsis Instabilities in Near Field of Turbulent Jets and Their Dependence on Initial Conditions and Reynolds Number by :
Download or read book Instabilities in Near Field of Turbulent Jets and Their Dependence on Initial Conditions and Reynolds Number written by and published by . This book was released on 1981 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Near-field pressure and velocity measurements, along with multiple flow visualization techniques, were obtained at several azimuthal positions to establish the effect of initial conditions and Reynolds number on the development and nature of instabilitiues in the initial region of axisymmetric free jets. In cases where the exit boundary layer is laminar, the natural jet is found to be unstable alternately to axisymmetric and helical modes having Strouhal numbers of 0.013 and 0.016, respectively. The scaling of these modes is independent of Reynolds number and initial jet disturbance level. However, the disturbance level does not determine the sensitivity of the initial region to the helical mode. When the initial axisymmetric mode grows to a finite amplitude, a subharmonic resonance mechanism that leads to pairing develops two wavelengths from the jet exit. The axisymmetric and helical modes interact nonlinearly, generating numerous sum and difference modes. With the strong growth of the subharmonic mode, a secondary set of nonlinear interactions develops between the subharmonic mode and the above modes. A strong near-field pressure is associated with each of these instability modes and is coherent with the velocity fluctuations in the jet over the entire growth and decay regions of each mode. The details of this field reveal that pairing is not responsible for a feedback mechanism. This strong near-field pressure acts as a natural excitation to the jet. When the background disturbance is sufficiently low, a natural coupling is observed at special operating conditions where the initial modes are coupled to the mode observed near the end of the potential core of the jet.
Book Synopsis Instabilities in Near Field of Turbulent Jets and Their Dependence on Initial Conditions and Reynolds Number by : Robert Edward Drubka
Download or read book Instabilities in Near Field of Turbulent Jets and Their Dependence on Initial Conditions and Reynolds Number written by Robert Edward Drubka and published by . This book was released on 1981 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Instabilities in Near Field of Turbulent Jets and Their Dependence on Intitial Conditions and Reynolds Number by : Robert Edward Drubka
Download or read book Instabilities in Near Field of Turbulent Jets and Their Dependence on Intitial Conditions and Reynolds Number written by Robert Edward Drubka and published by . This book was released on 1981 with total page 744 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 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure of Complex Turbulent Shear Flow by : R. Dumas
Download or read book Structure of Complex Turbulent Shear Flow written by R. Dumas and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Symposium on structure of Complex turbulent shear flows was proposed by the "Comite National Fran
Author :Genevieve Comte-Bellot Publisher :Springer Science & Business Media ISBN 13 :3642830455 Total Pages :597 pages Book Rating :4.6/5 (428 download)
Book Synopsis Advances in Turbulence by : Genevieve Comte-Bellot
Download or read book Advances in Turbulence written by Genevieve Comte-Bellot and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1964 the main function of the European Mechanics Committee has been to arrange Euromech Colloquia. These are three- or four-day meetings for the discussion of current research on a specified and relatively narrow topic in mechanics, by about 50 specialists chosen for their active involvement in research in that topic. The organization of each Euromech Colloquium is entrusted by the Committee to one or two selected scientists of repute in the field, and these organizers are enjoined to achieve a friendly and informal forum for discussion, with a minimum of paper work and expenditure. Over 220 Euromech Colloquia have been held since 1964 (about 40 each in France, West Germany and Britain and the remainder in 18 countries in both western and eastern Europe) on a wide range of topics drawn from the mechanics of solid materials, hydrodynamics, gas dynamics and mechanical systems. The Committee believes that collectively, Euromech Colloquia have made a significant contribution to the exchange of ideas on topics in mechanics within Europe and have thereby helped to overcome the barriers to easy scientific communication in that sorely divided continent. A few years ago the European Mechanics Committee turned its atten tion to the possible need for European conferences on a larger scale than Euromech Colloquia.
Book Synopsis Transition, Turbulence, and Noise by : Reda R. Mankbadi
Download or read book Transition, Turbulence, and Noise written by Reda R. Mankbadi and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulence takes place in most flow situations whethertheyoccur naturally or in technological systems. Therefore, considerable effort is being expended in an attempt to understand the phenomenon of turbulence. The recent discovery ofcoherent structure in turbulent shear flows and the modem developments in computer capabilities have revolutionized research work in turbulence. There is a strong evidence that the coherent structure in turbulent shear flows is reminiscent of nonlinear stability waves. As such, the interest in nonlinear stability waves has increased not only for the understandingofthe latterstages of the laminar-turbulent transition process, but also for understanding the coherent structures in turbulent flows. Also. the advances in computers have made direct numerical simulation possible at Low-Reynolds numbers and large-eddy simulation possible at high Reynolds numbers. This made first-principles prediction of turbulence-generated noise feasible. Therefore, this book aims at presenting a graduate-level introductory study of turbulence while accounting for such recent views of concern to researchers. This book is an outgrowth oflecture notes on the subject offered to graduate students in engineering. The book should be of interest to research engineers and graduatestudents in science and engineering. The theoretical basis presented is sufficient not only for studying the specialized literature on turbulence but also for theoretical investigations on the subject.
Download or read book Flow Control written by Thomas C. Corke and published by Cambridge University Press. This book was released on 2024-04-11 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive treatment of passive and active flow control in fluid dynamics, with an emphasis on utilizing fluid instabilities for enhancing control performance. Examples are given from a wide range of technologically important flow fields occurring in aerospace applications, from low-subsonic to hypersonic Mach numbers. This essential book can be used for both research and teaching on the topics of fluid instabilities, fluid measurement and flow actuator techniques, and problem sets are provided at the end of each chapter to reinforce key concepts and further extend readers' understanding of the field. The solutions manual is available as a online resource for instructors. The text is well suited for both graduate students in fluid dynamics and for practising engineers in the aerodynamics design field.
Book Synopsis Whither Turbulence and Big Data in the 21st Century? by : Andrew Pollard
Download or read book Whither Turbulence and Big Data in the 21st Century? written by Andrew Pollard and published by Springer. This book was released on 2016-08-30 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a snapshot of the current and future trends in turbulence research across a range of disciplines. It provides an overview of the key challenges that face scientific and engineering communities in the context of huge databases of turbulence information currently being generated, yet poorly mined. These challenges include coherent structures and their control, wall turbulence and control, multi-scale turbulence, the impact of turbulence on energy generation and turbulence data manipulation strategies. The motivation for this volume is to assist the reader to make physical sense of these data deluges so as to inform both the research community as well as to advance practical outcomes from what is learned. Outcomes presented in this collection provide industry with information that impacts their activities, such as minimizing impact of wind farms, opportunities for understanding large scale wind events and large eddy simulation of the hydrodynamics of bays and lakes thereby increasing energy efficiencies, and minimizing emissions and noise from jet engines. Elucidates established, contemporary, and novel aspects of fluid turbulence - a ubiquitous yet poorly understood phenomena; Explores computer simulation of turbulence in the context of the emerging, unprecedented profusion of experimental data,which will need to be stewarded and archived; Examines a compendium of problems and issues that investigators can use to help formulate new promising research ideas; Makes the case for why funding agencies and scientists around the world need to lead a global effort to establish and steward large stores of turbulence data, rather than leaving them to individual researchers.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1981 with total page 552 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 1972 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Insights Into Instability and Transition to Turbulence in Open-flow Systems by : Institute for Computer Applications in Science and Engineering
Download or read book Recent Insights Into Instability and Transition to Turbulence in Open-flow Systems written by Institute for Computer Applications in Science and Engineering and published by . This book was released on 1988 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the ... U.S. National Congress of Applied Mechanics by :
Download or read book Proceedings of the ... U.S. National Congress of Applied Mechanics written by and published by . This book was released on 1994 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1993 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Wave Interactions in Fluids by : American Society of Mechanical Engineers. Winter Annual Meeting
Download or read book Nonlinear Wave Interactions in Fluids written by American Society of Mechanical Engineers. Winter Annual Meeting and published by . This book was released on 1987 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1978 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 30th Aerospace Sciences Meeting and Exhibit: 92-0531 - 92-0559 by :
Download or read book 30th Aerospace Sciences Meeting and Exhibit: 92-0531 - 92-0559 written by and published by . This book was released on 1992 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
