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Compressibility Turbulence and High Speed Flow

Compressibility  Turbulence and High Speed Flow Author Thomas B. Gatski
ISBN-10 9780123973184
Release 2013-03-05
Pages 342
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Compressibility, Turbulence and High Speed Flow introduces the reader to the field of compressible turbulence and compressible turbulent flows across a broad speed range, through a unique complimentary treatment of both the theoretical foundations and the measurement and analysis tools currently used. The book provides the reader with the necessary background and current trends in the theoretical and experimental aspects of compressible turbulent flows and compressible turbulence. Detailed derivations of the pertinent equations describing the motion of such turbulent flows is provided and an extensive discussion of the various approaches used in predicting both free shear and wall bounded flows is presented. Experimental measurement techniques common to the compressible flow regime are introduced with particular emphasis on the unique challenges presented by high speed flows. Both experimental and numerical simulation work is supplied throughout to provide the reader with an overall perspective of current trends. An introduction to current techniques in compressible turbulent flow analysis An approach that enables engineers to identify and solve complex compressible flow challenges Prediction methodologies, including the Reynolds-averaged Navier Stokes (RANS) method, scale filtered methods and direct numerical simulation (DNS) Current strategies focusing on compressible flow control



Numerical Computation of Compressible Turbulent High Speed Flows

Numerical Computation of Compressible  Turbulent  High Speed Flows Author Yildirim Bora Suzen
ISBN-10 OCLC:40390940
Release 1998
Pages 254
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Numerical Computation of Compressible Turbulent High Speed Flows has been writing in one form or another for most of life. You can find so many inspiration from Numerical Computation of Compressible Turbulent High Speed Flows also informative, and entertaining. Click DOWNLOAD or Read Online button to get full Numerical Computation of Compressible Turbulent High Speed Flows book for free.



Compressibility Effects on Turbulence in High Speed Flows

Compressibility Effects on Turbulence in High Speed Flows Author H. Ha Minh
ISBN-10 OCLC:897670215
Release 1989
Pages 57
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Compressibility Effects on Turbulence in High Speed Flows has been writing in one form or another for most of life. You can find so many inspiration from Compressibility Effects on Turbulence in High Speed Flows also informative, and entertaining. Click DOWNLOAD or Read Online button to get full Compressibility Effects on Turbulence in High Speed Flows book for free.



Implicit LES of Turbulent Compressible High speed Flows with Transverse Jet Injection

Implicit LES of Turbulent Compressible High speed Flows with Transverse Jet Injection Author Zeeshan Ahmed Rana
ISBN-10 OCLC:806196256
Release 2011
Pages
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Implicit Large Eddy Simulation (ILES) has rapidly emerged as a powerful techniquewhich is utilised to explore the unsteady compressible turbulent flows. Apart from o ering accuracy in numerical simulations, ILES is also computationallye cient compared to Direct Numerical Simulations or conventional Large Eddy Simulations. This report focuses on the validation of the existing high-resolution methodswithin the framework of ILES and explores its applications to the high-speed compressibleturbulent flows such as a typical flow field inside a scramjet engine. Themethodology applied in the current work employs a fifth-order MUSCL scheme witha modified variable extrapolation and a three-stage second-order Runge-Kutta schemefor temporal advancement. In order to simulate a realistic and accurate supersonic turbulent boundary layer (STBL)a synthetic turbulent inflow data generation method based upon digital filters has beenimplemented. This technique has been validated and compared against various otherturbulent inflow data generation methods in order to find the most accurate, reliableand computationally e cient technique. The high-speed complex multi-species flowof a transverse sonic jet injection into a supersonic crossflow (JISC), which is typicalfuel injection strategy inside a scramjet engine, has been investigated for time-averagedand instantaneous flow. It has been demonstrated that the incoming STBL plays a vitalrole in establishing the correct flow dynamics in JISC study as it enhances the KHinstabilities in the flow field. Thermally perfect gas formulation has been implemented according to the NACA-1135 report to study the e ects of high temperatures on the ratio of specific heats (). Using this, the full geometry of the HyShot-II scramjet engine is investigated to obtainthe inflow conditions for the HyShot-II combustion chamber. Although the design ofHyShot-II allowed to disgorge the shock and boundary layer which could otherwiseenter the combustion chamber, but, it has been demonstrated that the flow field insidethe combustion chamber still consists of a weak shock-train. Finally, the hydrogeninjection is analysed inside the HyShot-II combustion chamber, with the shock-traintravelling inside and the incoming STBL using digital filters based technique, to explorevarious time-averaged and instantaneous flow structures and parameters with aview to enhance the understanding of the complex flow field inside the combustionchamber. It is demonstrated from the detailed investigations of a complex high-speedflow that ILES methodology has the potential to develop the understandings of thehigh-speed compressible turbulent flows using comparatively less computational resources.



Turbulent Shear Layers in Supersonic Flow

Turbulent Shear Layers in Supersonic Flow Author Alexander J. Smits
ISBN-10 9780387263052
Release 2006-05-11
Pages 410
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A good understanding of turbulent compressible flows is essential to the design and operation of high-speed vehicles. Such flows occur, for example, in the external flow over the surfaces of supersonic aircraft, and in the internal flow through the engines. Our ability to predict the aerodynamic lift, drag, propulsion and maneuverability of high-speed vehicles is crucially dependent on our knowledge of turbulent shear layers, and our understanding of their behavior in the presence of shock waves and regions of changing pressure. Turbulent Shear Layers in Supersonic Flow provides a comprehensive introduction to the field, and helps provide a basis for future work in this area. Wherever possible we use the available experimental work, and the results from numerical simulations to illustrate and develop a physical understanding of turbulent compressible flows.



Variable Density Fluid Turbulence

Variable Density Fluid Turbulence Author P. Chassaing
ISBN-10 9789401700757
Release 2013-06-29
Pages 382
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The first part aims at providing the physical and theoretical framework of the analysis of density variations in fully turbulent flows. Its scope is deliberately educational. In the second part, basic data on dynamical and scalar properties of variable density turbulent flows are presented and discussed, based on experimental data and/or results from direct numerical simulations. This part is rather concerned with a research audience. The last part is more directly devoted to an engineering audience and deals with prediction methods for turbulent flows of variable density fluid. Both first and second order, single point modeling are discussed, with special emphasis on the capability to include specific variable density / compressibility effects.



High Speed Flow

High Speed Flow Author Christopher John Chapman
ISBN-10 0521666473
Release 2000-03-28
Pages 258
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High Speed Flow is a text-book suitable for undergraduates, postgraduates, and research-workers in fluid dynamics. It covers such topics as subsonic and supersonic flight, shock waves, high-speed aerofoils, and temperature changes. Starting from first principles, the book gives complete and elementary derivations of all results, and takes the reader to research-level in the subject. The book contains many exercises and an extensive bibliography, providing access to the entire literature of the subject from 1860 to the present day, and including over two hundred items published since 1990. It contains the most extensive set of formulae on thermodynamics and oblique shock waves ever assembled.



High Resolution Methods for Incompressible and Low Speed Flows

High Resolution Methods for Incompressible and Low Speed Flows Author D. Drikakis
ISBN-10 9783540264545
Release 2006-03-30
Pages 622
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The study of incompressible ?ows is vital to many areas of science and te- nology. This includes most of the ?uid dynamics that one ?nds in everyday life from the ?ow of air in a room to most weather phenomena. Inundertakingthesimulationofincompressible?uid?ows,oneoftentakes many issues for granted. As these ?ows become more realistic, the problems encountered become more vexing from a computational point-of-view. These range from the benign to the profound. At once, one must contend with the basic character of incompressible ?ows where sound waves have been analytically removed from the ?ow. As a consequence vortical ?ows have been analytically “preconditioned,” but the ?ow has a certain non-physical character (sound waves of in?nite velocity). At low speeds the ?ow will be deterministic and ordered, i.e., laminar. Laminar ?ows are governed by a balance between the inertial and viscous forces in the ?ow that provides the stability. Flows are often characterized by a dimensionless number known as the Reynolds number, which is the ratio of inertial to viscous forces in a ?ow. Laminar ?ows correspond to smaller Reynolds numbers. Even though laminar ?ows are organized in an orderly manner, the ?ows may exhibit instabilities and bifurcation phenomena which may eventually lead to transition and turbulence. Numerical modelling of suchphenomenarequireshighaccuracyandmostimportantlytogaingreater insight into the relationship of the numerical methods with the ?ow physics.



Handbook of Fluid Dynamics Second Edition

Handbook of Fluid Dynamics  Second Edition Author Richard W. Johnson
ISBN-10 9781439849576
Release 2016-04-06
Pages 1560
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Handbook of Fluid Dynamics offers balanced coverage of the three traditional areas of fluid dynamics—theoretical, computational, and experimental—complete with valuable appendices presenting the mathematics of fluid dynamics, tables of dimensionless numbers, and tables of the properties of gases and vapors. Each chapter introduces a different fluid dynamics topic, discusses the pertinent issues, outlines proven techniques for addressing those issues, and supplies useful references for further research. Covering all major aspects of classical and modern fluid dynamics, this fully updated Second Edition: Reflects the latest fluid dynamics research and engineering applications Includes new sections on emerging fields, most notably micro- and nanofluidics Surveys the range of numerical and computational methods used in fluid dynamics analysis and design Expands the scope of a number of contemporary topics by incorporating new experimental methods, more numerical approaches, and additional areas for the application of fluid dynamics Handbook of Fluid Dynamics, Second Edition provides an indispensable resource for professionals entering the field of fluid dynamics. The book also enables experts specialized in areas outside fluid dynamics to become familiar with the field.



Compressible Turbulent Reading Flows

Compressible Turbulent Reading Flows Author
ISBN-10 OCLC:946623486
Release 1999
Pages 21
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Research was conducted under this grant to advance fundamental understanding and predictive models of turbulent reacting flows relevant to Air Force needs in high-speed propulsion Advanced computational schemes including direct numerical simulation (DNS) and large eddy simulation (LES) were used in addition to turbulent combustion theory. Reduced chemical mechanisms for hydrogen-air combustion were developed and tested. Specific flows investigated include the reacting shear layer and the jet. A new mechanism that relates the reduction in fuel/oxidant mixing in high-speed flows to the inhibited communication of pressure signals was proposed. A resulting compressibility model was found to give good predictions. Both mean density changes and Mach number were found to affect the flow development in high-speed combustion. It was found that the transport and molecular mixing of reactive scalars are substantially affected by heat release and must be accounted for in closures of turbulence/chemistry interaction. LES of a spatially-evolving jet were performed and successfully compared with our DNS and previous experiments. New subgrid scale models were developed for LES of nonequilibrium flows. The results obtained here should help improve current abilities to analyze and design propulsion systems that employ high-speed turbulent combustion.



Closure Strategies for Turbulent and Transitional Flows

Closure Strategies for Turbulent and Transitional Flows Author B. E. Launder
ISBN-10 0521792088
Release 2002-02-21
Pages 754
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Coherent collection of lectures and state-of-the-art surveys on turbulence modelling by leading researchers.



Advances in Turbulence XI

Advances in Turbulence XI Author J. M. L. M. Palma
ISBN-10 3540726047
Release 2008-01-08
Pages 790
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This volume comprises the communications presented at the ETC 11, the EUROMECH European Turbulence conference held in 2007 in Porto. The scientific committee has chosen the contributions out of the following topics: Acoustics of turbulent flows; Atmospheric turbulence; Control of turbulent flows; Geophysical and astrophysical turbulence; Instability and transition; Intermittency and scaling; Large eddy simulation and related techniques; MHD turbulence; Reacting and compressible turbulence; Transport and mixing; Turbulence in multiphase and non-Newtonian flows; Vortex dynamics and structure formation; Wall bounded flows.



Transitional and turbulent compressible flows 1995

Transitional and turbulent compressible flows  1995 Author American Society of Mechanical Engineers. Fluids Engineering Division
ISBN-10 STANFORD:36105017251781
Release 1995-01
Pages 217
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Transitional and turbulent compressible flows 1995 has been writing in one form or another for most of life. You can find so many inspiration from Transitional and turbulent compressible flows 1995 also informative, and entertaining. Click DOWNLOAD or Read Online button to get full Transitional and turbulent compressible flows 1995 book for free.



Transitional and Turbulent Compressible Flows

Transitional and Turbulent Compressible Flows Author L. D. Kral
ISBN-10 0791814793
Release 1995
Pages 217
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Transitional and Turbulent Compressible Flows has been writing in one form or another for most of life. You can find so many inspiration from Transitional and Turbulent Compressible Flows also informative, and entertaining. Click DOWNLOAD or Read Online button to get full Transitional and Turbulent Compressible Flows book for free.



Study of Compressible Turbulent Flows in Supersonic Environment by Large eddy Simulation

Study of Compressible Turbulent Flows in Supersonic Environment by Large eddy Simulation Author Franklin Marie Genin
ISBN-10 OCLC:456072040
Release 2009
Pages
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A Large-Eddy Simulation (LES) methodology adapted to the resolution of high Reynolds number turbulent flows in supersonic conditions was proposed and developed. A novel numerical scheme was designed, that switches from a low-dissipation central scheme for turbulence resolution to a flux difference splitting scheme in regions of discontinuities. Furthermore, a state-of-the-art closure model was extended in order to take compressibility effects and the action of shock / turbulence interaction into account. The proposed method was validated against fundamental studies of high speed flows and shock / turbulence interaction studies. This new LES approach was employed for the study of shock / turbulent shear layer interaction as a mixing-augmentation technique, and highlighted the efficiency in mixing improvement after the interaction, but also the limited spatial extent of this turbulent enhancement. A second practical study was conducted by simulating the injection of a sonic jet normally to a supersonic crossflow. The validity of the simulation was assessed by comparison with experimental data, and the dynamics of the interaction was examined. The sources of vortical structures were identified, with a particular emphasis on the impact of the flow speed onto the vortical evolution.



Transition Turbulence and Combustion Modelling

Transition  Turbulence and Combustion Modelling Author A. Hanifi
ISBN-10 0792359895
Release 1999-10-31
Pages 532
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This single-volume work gives an introduction to the fields of transition, turbulence, and combustion modeling of compressible flows and provides the physical background for today’s modeling approaches in these fields. It presents basic equations and discusses fundamental aspects of hydrodynamical instability.



Mathematical Modeling for Complex Fluids and Flows

Mathematical Modeling for Complex Fluids and Flows Author Michel Deville
ISBN-10 9783642252952
Release 2012-01-12
Pages 264
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Mathematical Modeling for Complex Fluids and Flows provides researchers and engineering practitioners encountering fluid flows with state-of-the-art knowledge in continuum concepts and associated fluid dynamics. In doing so it supplies the means to design mathematical models of these flows that adequately express the engineering physics involved. It exploits the implicit link between the turbulent flow of classical Newtonian fluids and the laminar and turbulent flow of non-Newtonian fluids such as those required in food processing and polymeric flows. The book develops a descriptive mathematical model articulated through continuum mechanics concepts for these non-Newtonian, viscoelastic fluids and turbulent flows. Each complex fluid and flow is examined in this continuum context as well as in combination with the turbulent flow of viscoelastic fluids. Some details are also explored via kinetic theory, especially viscoelastic fluids and their treatment with the Boltzmann equation. Both solution and modeling strategies for turbulent flows are laid out using continuum concepts, including a description of constructing polynomial representations and accounting for non-inertial and curvature effects. Ranging from fundamental concepts to practical methodology, and including discussion of emerging technologies, this book is ideal for those requiring a single-source assessment of current practice in this intricate yet vital field.