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Numerical Simulation Of Micro Ramp Control For Oblique Shock Wave Boundary Layer Interactions
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Book Synopsis Numerical Simulation of Micro-ramp Control for Oblique Shock Wave/boundary Layer Interactions by : Aaron F. Shinn
Download or read book Numerical Simulation of Micro-ramp Control for Oblique Shock Wave/boundary Layer Interactions written by Aaron F. Shinn and published by . This book was released on 2007 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shock Wave-Boundary-Layer Interactions by : Holger Babinsky
Download or read book Shock Wave-Boundary-Layer Interactions written by Holger Babinsky and published by Cambridge University Press. This book was released on 2011-09-12 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shock wave-boundary-layer interaction (SBLI) is a fundamental phenomenon in gas dynamics that is observed in many practical situations, ranging from transonic aircraft wings to hypersonic vehicles and engines. SBLIs have the potential to pose serious problems in a flowfield; hence they often prove to be a critical - or even design limiting - issue for many aerospace applications. This is the first book devoted solely to a comprehensive, state-of-the-art explanation of this phenomenon. It includes a description of the basic fluid mechanics of SBLIs plus contributions from leading international experts who share their insight into their physics and the impact they have in practical flow situations. This book is for practitioners and graduate students in aerodynamics who wish to familiarize themselves with all aspects of SBLI flows. It is a valuable resource for specialists because it compiles experimental, computational and theoretical knowledge in one place.
Book Synopsis AIAA 2007-4115 by : Charles W. Pitt Ford
Download or read book AIAA 2007-4115 written by Charles W. Pitt Ford and published by . This book was released on 2007 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Order Large Eddy Simulation for Shock-Boundary Layer Interaction Control by a Micro-ramp Vortex Generator by : Chaoqun Liu
Download or read book High Order Large Eddy Simulation for Shock-Boundary Layer Interaction Control by a Micro-ramp Vortex Generator written by Chaoqun Liu and published by Bentham Science Publishers. This book was released on 2017-12-08 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents an implicitly implemented large eddy simulation (ILES) by using the fifth order bandwidth-optimized WENO scheme. The chosen method is applied to make comprehensive studies on ramp flows with and without control at Mach 2.5 and Re=5760. Flow control in the form of microramp vortex generators (MVG) is applied. The results show that a MVG can distinctly reduce the separation zone at the ramp corner and lower the boundary layer shape factor under simulated conditions. A series of new findings about the MVG-ramp flow are obtained, including structures relevant to surface pressure, three-dimensional structures of the re-compression shock waves, a complete surface separation pattern, momentum deficit and a new secondary vortex system. A new mechanism of shock-boundary layer interaction control by MVG associated with a series of vortex rings is also presented. Vortex rings strongly interact with air flow and play an important role in the separation zone reduction. Additionally, readers will learn about the governing equation, boundary condition, high quality grid generation, high order shock capturing scheme and DNS inflow condition in detail. This volume will, therefore, serve as a useful reference for aerospace researchers using LES methods to study shock boundary layer interaction and supersonic flow control.
Book Synopsis Numerical Simulations and Analyses of Shock Wave-boundary Layer Interactions by : Avinash Jammalamadaka
Download or read book Numerical Simulations and Analyses of Shock Wave-boundary Layer Interactions written by Avinash Jammalamadaka and published by . This book was released on 2013 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shock-boundary layer interaction (SBLI) is becoming one of the benchmark problems in the high-speed flow modeling and simulation community. The interaction of shock wave with the boundary layer is a very complex phenomenon that requires high-fidelity numerical methods like direct numerical simulation (DNS) and large-eddy simulation (LES) to capture the flow physics. In this study, SBLI is examined for various flow conditions using DNS and LES. -- Abstract.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781719380089 Total Pages :30 pages Book Rating :4.3/5 (8 download)
Book Synopsis Experimental Investigation of the Application of Microramp Flow Control to an Oblique Shock Interaction by : National Aeronautics and Space Administration (NASA)
Download or read book Experimental Investigation of the Application of Microramp Flow Control to an Oblique Shock Interaction written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-20 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effectiveness of microramp flow control devices in controlling an oblique shock interaction was tested in the 15- by 15-Centimeter Supersonic Wind Tunnel at NASA Glenn Research Center. Fifteen microramp geometries were tested varying the height, chord length, and spacing between ramps. Measurements of the boundary layer properties downstream of the shock reflection were analyzed using design of experiments methods. Results from main effects, D-optimal, full factorial, and central composite designs were compared. The designs provided consistent results for a single variable optimization. Hirt, Stefanie M. and Anderson, Bernhard H. Glenn Research Center OBLIQUE SHOCK WAVES; BOUNDARY LAYERS; SHOCK WAVE INTERACTION; EXPERIMENT DESIGN; FACTORIAL DESIGN; SUPERSONIC WIND TUNNELS; SPACING
Book Synopsis 28th International Symposium on Shock Waves by : Konstantinos Kontis
Download or read book 28th International Symposium on Shock Waves written by Konstantinos Kontis and published by Springer Science & Business Media. This book was released on 2012-03-22 with total page 1122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The University of Manchester hosted the 28th International Symposium on Shock Waves between 17 and 22 July 2011. The International Symposium on Shock Waves first took place in 1957 in Boston and has since become an internationally acclaimed series of meetings for the wider Shock Wave Community. The ISSW28 focused on the following areas: Blast Waves, Chemically Reacting Flows, Dense Gases and Rarefied Flows, Detonation and Combustion, Diagnostics, Facilities, Flow Visualisation, Hypersonic Flow, Ignition, Impact and Compaction, Multiphase Flow, Nozzle Flow, Numerical Methods, Propulsion, Richtmyer-Meshkov, Shockwave Boundary Layer Interaction, Shock Propagation and Reflection, Shock Vortex Interaction, Shockwave Phenomena and Applications, as well as Medical and Biological Applications. The two Volumes contain the papers presented at the symposium and serve as a reference for the participants of the ISSW 28 and individuals interested in these fields.
Book Synopsis An Investigation of Oblique Shock/Boundary Layer Interaction Control by :
Download or read book An Investigation of Oblique Shock/Boundary Layer Interaction Control written by and published by . This book was released on 1993 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this work is to provide a basic understanding of the flow in the shock boundary layer interactions and of the mechanisms of their control. A parametric investigation was conducted to determine the effect of bleed configuration on the flow in the interaction region of an incident oblique shock with a turbulent boundary layer. Results of the numerical flow simulations were obtained for different slot widths, depths and slat angles over a bleed mass flow range between zero and choked conditions. The bleed results reveal a complex structure of compression expansion wave system over the bleed port entrance, and different levels of flow operation inside the slot. Code development for the implicit numerical solution of the two dimensional compressible Navier-Stokes and K- Epsilon equations was completed. The code was used in the simulation of unsteady supersonic cavity flow and the results compared with experimental data ... Shock boundary layer bleed interactions.
Book Synopsis Parallel Computational Fluid Dynamics by : Kenli Li
Download or read book Parallel Computational Fluid Dynamics written by Kenli Li and published by Springer. This book was released on 2014-03-08 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 25th International Conference on Parallel Computational Fluid Dynamics, ParCFD 2013, held in Changsha, China, in May 2013. The 35 revised full papers presented were carefully reviewed and selected from more than 240 submissions. The papers address issues such as parallel algorithms, developments in software tools and environments, unstructured adaptive mesh applications, industrial applications, atmospheric and oceanic global simulation, interdisciplinary applications and evaluation of computer architectures and software environments.
Book Synopsis Experimental Study of Separated Ramp-induced Shock/boundary-layer Interaction with Upstream Micro-vortex Generation at Mach 2.5 by : Yusi Shih
Download or read book Experimental Study of Separated Ramp-induced Shock/boundary-layer Interaction with Upstream Micro-vortex Generation at Mach 2.5 written by Yusi Shih and published by . This book was released on 2014 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shock wave/boundary layer interactions (SBLIs) are important issues for high-speed vehicles. SBLIs reduce the performance of aerodynamic surfaces and engine inlets, amongst a number of adverse effects. Micro-vortex generators (MVGs) are a flow control method with strong potential to mitigate the effects of SBLI by energizing the boundary layer through momentum transfers from the freestream. They have been implemented in actual configurations at low speeds. The present research includes a combined experimental and theoretical analysis of the evolution of the perturbation downstream the MVG, the formation of vortices, and their interaction with the shock front. Experiments were performed with a baseline MVG configuration of 90° trailing edge on flat plate, ramp alone, and also with MVG mounted ahead of a 20° ramp. The surface flow visualization and particle image velocimetry (PIV) results are presented; the surface flow visualization shows a substantial suppression of SBLIs. A new method to quantify the effectiveness of the MVG on the shock recompression is presented. Moreover, the PIV results were used as the initial input values for the simulation work. A theoretical analysis of the interaction of the MVG perturbation with the boundary layer is performed by assuming linear dynamics of the perturbation. The major assumption is that the interaction between MVG perturbation and the shear flow is affected by transient growth as a result of the non-orthogonality of the linearized Navier-Stokes equations. A new method to perform the projection of the measured perturbation on the continuous modes of the boundary layer is presented. The method takes advantage of the biorthogonality of the direct and adjoint modes. The implementation of such a method using both the Chebyshev polynomials and a shooting algorithm is discussed. The results of the theoretical analysis are encouraging and display a similar trend as the experiments. Both experimental and theoretical results yield perturbation decay not far downstream from the MVG: about 72 mm for experiments, and about 95 mm for simulation. The experiments display two distinguishable growths downstream of MVG, while the simulation predicted one small growth at the very beginning. Both works show trends that agree well with each other.
Book Synopsis The Proceedings of the 2021 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2021), Volume 1 by : Sangchul Lee
Download or read book The Proceedings of the 2021 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2021), Volume 1 written by Sangchul Lee and published by Springer Nature. This book was released on 2022-08-30 with total page 1027 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceeding comprises peer-reviewed papers of the 2021 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2021), held from 15-17 November 2021 in Jeju, South Korea. This book deals with various themes on computational fluid dynamics, wind tunnel testing, flow visualization, UAV design, flight simulation, satellite attitude control, aeroelasticity and control, combustion analysis, fuel injection, cooling systems, spacecraft propulsion and so forth. So, this book can be very helpful not only for the researchers of universities and academic institutes, but also for the industry engineers who are interested in the current and future advanced topics in aerospace technology.
Book Synopsis Micro-ramp Flow Control for Oblique Shock Interactions :. by : Stefanie M. Hirt
Download or read book Micro-ramp Flow Control for Oblique Shock Interactions :. written by Stefanie M. Hirt and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Study of Shock-wave Boundary Layer Interaction on a Compression Ramp Gap by : Andrew Brandon Bell
Download or read book Numerical Study of Shock-wave Boundary Layer Interaction on a Compression Ramp Gap written by Andrew Brandon Bell and published by . This book was released on 2018 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of a gap between a flat plate and a compression ramp on the shock wave/boundary layer interaction (SWBLI) at the ramp corner is investigated numerically. The behavior of supersonic flow over compression ramps where SWBLI occurs has been a topic of study, numerically and experimentally, for many years. There have been studies on how the interaction occurs and how to mitigate its effects. This investigation will focus on the effect of placing a gap in front of the ramp. Using ANSYS Fluent and a Spalart-Allmaras turbulence model, two 3D models experience Mach 3 flows at a ramp angle of 24° with and without a gap. Steady state simulations highlight the characteristic features of SWBLIs on compression ramps (separation point, reattachment point, and recirculation region) and how these features are altered by the presence of the gap. Span-wise averaging is performed to represent pressure, temperature, and skin friction surface data, and these data are used to analyze the effect of the gap. The hypothesis is that the addition of the gap will lower the negative effect of the SWBLI on the surface. Additional test cases are created to observe the effect of angle of attack change, boundary layer height change, and Mach number change on the gap. With the addition of the gap, the SWLBI recirculation region is found to move from the corner into the gap and the shock impinges directly from the corner of the ramp. This changes the location of pressure and temperature loading on the surfaces. The average temperature is lower with the addition of the gap, but the amount of pressure loading across the surfaces stays within 1%. The pattern of skin surface friction on the ramp, however, changes dramatically when the gap is added. The skin friction coefficeint value decreases by 100% at top of the ramp when the gap is added. The present research introduces and investigates a scarcely covered technique to help mitigate or control the effects of SWBLI on a compression ramp and addresses possible work to follow-up this study.
Book Synopsis Understanding Micro-Ramp Control for Shock Boundary Layer Interactions by :
Download or read book Understanding Micro-Ramp Control for Shock Boundary Layer Interactions written by and published by . This book was released on 2008 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro-vortex generators (micro-VGs) have the ability to alter the near-wall structure of compressible turbulent boundary layers in such a way that the flow becomes significantly less susceptible to separations and more stable to unsteady disturbances. Due to their extremely small size, micro-VGs are embedded in the boundary layer and may provide reduced viscous drag when compared to traditional vortex generators. Of several candidate micro-VGs, micro-ramps have been found to significantly impact shock boundary layer interaction flows, while being cost-effective, physically robust, and requiring no power sources. Thus detailed study of flow interactions with micro-ramps on a supersonic boundary layer at M=3.0 was investigated using monotone integrated Large Eddy Simulations (MILES) and Reynolds Averaged Navier-Stokes (RANS). A rescale-recycle method was used to efficiently generate turbulent in-flow conditions. Studies showed that the vortical structure generated from the micro-ramp flows through the separation region caused by the impinging shock, which helped to reduce the area of separation.
Book Synopsis Investigation of an Oblique Shock Wave-boundary Layer Interaction by : George Ulrich Loffert
Download or read book Investigation of an Oblique Shock Wave-boundary Layer Interaction written by George Ulrich Loffert and published by . This book was released on 1964 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Passive Control of Oblique Shock/boundary Layer Interaction at High Mach Number by : V. Borovoy
Download or read book Passive Control of Oblique Shock/boundary Layer Interaction at High Mach Number written by V. Borovoy and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Innovative Design, Analysis and Development Practices in Aerospace and Automotive Engineering (I-DAD 2018) by : U. Chandrasekhar
Download or read book Innovative Design, Analysis and Development Practices in Aerospace and Automotive Engineering (I-DAD 2018) written by U. Chandrasekhar and published by Springer. This book was released on 2018-12-14 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book includes the best articles presented by researchers, academicians and industrial experts at the International Conference on “Innovative Design and Development Practices in Aerospace and Automotive Engineering (I-DAD 2018)”. The book discusses new concept in designs, and analysis and manufacturing technologies for improved performance through specific and/or multi-functional design aspects to optimise the system size, weight-to-strength ratio, fuel efficiency and operational capability. Other aspects of the conference address the ways and means of numerical analysis, simulation and additive manufacturing to accelerate the product development cycles.Describing innovative methods, the book provides valuable reference material for educational and research organizations, as well as industry, wanting to undertake challenging projects of design engineering and product development.
