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Numerical Study Of Shock Wave Boundary Layer Interaction On A Compression Ramp Gap
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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 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 A Numerical Study of Two-dimensional Oblique Shock Wave/laminar Boundary Layer Interaction with Bleed by : Tony R. Lehnig
Download or read book A Numerical Study of Two-dimensional Oblique Shock Wave/laminar Boundary Layer Interaction with Bleed written by Tony R. Lehnig and published by . This book was released on 1989 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics and Numerical Simulation of Shock Wave/turbulent Boundary-layer Interactions by : G. W. Heard
Download or read book Physics and Numerical Simulation of Shock Wave/turbulent Boundary-layer Interactions written by G. W. Heard and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transition Location Effect on Shock Wave Boundary Layer Interaction by : Piotr Doerffer
Download or read book Transition Location Effect on Shock Wave Boundary Layer Interaction written by Piotr Doerffer and published by Springer Nature. This book was released on 2020-07-30 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents experimental and numerical findings on reducing shock-induced separation by applying transition upstream the shock wave. The purpose is to find out how close to the shock wave the transition should be located in order to obtain favorable turbulent boundary layer interaction. The book shares findings obtained using advanced flow measurement methods and concerning e.g. the transition location, boundary layer characteristics, and the detection of shock wave configurations. It includes a number of experimental case studies and CFD simulations that offer valuable insights into the flow structure. It covers RANS/URANS methods for the experimental test section design, as well as more advanced techniques, such as LES, hybrid methods and DNS for studying the transition and shock wave interaction in detail. The experimental and numerical investigations presented here were conducted by sixteen different partners in the context of the TFAST Project. The general focus is on determining if and how it is possible to improve flow performance in comparison to laminar interaction. The book mainly addresses academics and professionals whose work involves the aerodynamics of internal and external flows, as well as experimentalists working with compressible flows. It will also be of benefit for CFD developers and users, and for students of aviation and propulsion systems alike.
Book Synopsis Two-dimensional Compression Corner and Planar Shock Wave Interactions with a Supersonic, Turbulent Boundary Layer by : C. Herbert Law
Download or read book Two-dimensional Compression Corner and Planar Shock Wave Interactions with a Supersonic, Turbulent Boundary Layer written by C. Herbert Law and published by . This book was released on 1975 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Numerical Study of Shockwave/boundary Layer Interaction in Nonequilibrium Chemically Reacting Air by : Adam A. Grumet
Download or read book A Numerical Study of Shockwave/boundary Layer Interaction in Nonequilibrium Chemically Reacting Air written by Adam A. Grumet and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Numerical Investigation of 3-D Shock Wave-turbulent Boundary Layer Interactions Generated by the Sharp Fin and Swept Compression Corner by : Yan Zang
Download or read book A Numerical Investigation of 3-D Shock Wave-turbulent Boundary Layer Interactions Generated by the Sharp Fin and Swept Compression Corner written by Yan Zang and published by . This book was released on 1988 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Book Synopsis Numerical Simulation of Shock/turbulent Boundary Layer Interactions Over 2-D Compression Corners by : Miguel Visbal
Download or read book Numerical Simulation of Shock/turbulent Boundary Layer Interactions Over 2-D Compression Corners written by Miguel Visbal and published by . This book was released on 1983 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Compression Ramp Induced Shock Wave/Turbulent Boundary Layer Interactions on a Compliant Material by : Harry Toan Pham
Download or read book Compression Ramp Induced Shock Wave/Turbulent Boundary Layer Interactions on a Compliant Material written by Harry Toan Pham and published by . This book was released on 2018 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulations of the Shock Wave-boundary Layer Interactions by : Ismaïl Ben Hassan Saïdi
Download or read book Numerical Simulations of the Shock Wave-boundary Layer Interactions written by Ismaïl Ben Hassan Saïdi and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Situations where an incident shock wave impinges upon a boundary layer are common in the aeronautical and spatial industries. Under certain circumstances (High Mach number, large shock angle...), the interaction between an incident shock wave and a boundary layer may create an unsteady separation bubble. This bubble, as well as the subsequent reflected shock wave, are known to oscillate in a low-frequency streamwise motion. This phenomenon, called the unsteadiness of the shock wave boundary layer interaction (SWBLI), subjects structures to oscillating loads that can lead to damages for the solid structure integrity.The aim of the present work is the unsteady numerical simulation of (SWBLI) in order to contribute to a better understanding of the SWBLI unsteadiness and the physical mechanism causing these low frequency oscillations of the interaction zone.To perform this study, an original numerical approach is used. The one step Finite Volume approach relies on the discretization of the convective fluxes of the Navier Stokes equations using the OSMP scheme developed up to the 7-th order both in space and time, the viscous fluxes being discretized using a standard centered Finite-Difference scheme. A Monotonicity-Preserving (MP) constraint is employed as a shock capturing procedure. The validation of this approach demonstrates the correct accuracy of the OSMP scheme to predict turbulent features and the great efficiency of the MP procedure to capture discontinuities without spoiling the solution and with an almost negligible additional cost. It is also shown that the use of the highest order tested of the OSMP scheme is relevant in term of simulation time and accuracy compromise. Moreover, an order of accuracy higher than 2-nd order for approximating the diffusive fluxes seems to have a negligible influence on the solution for such relatively high Reynolds numbers.By simulating the 3D unsteady interaction between a laminar boundary layer and an incident shock wave, we suppress the suspected influence of the large turbulent structures of the boundary layer on the SWBLI unsteadiness, the only remaining suspected cause of unsteadiness being the dynamics of the separation bubble. Results show that only the reattachment point oscillates at low frequencies characteristic of the breathing of the separation bubble. The separation point of the recirculation bubble and the foot of the reflected shock wave have a fixed location along the flat plate with respect to time. It shows that, in this configuration, the SWBLI unsteadiness is not observed.In order to reproduce and analyse the SWBLI unsteadiness, the simulation of a shock wave turbulent boundary layer interaction (SWTBLI) is performed. A Synthetic Eddy Method (SEM), adapted to compressible flows, has been developed and used at the inlet of the simulation domain for initiating the turbulent boundary layer without prohibitive additional computational costs. Analyses of the results are performed using, among others, the snapshot Proper Orthogonal Decomposition (POD) technique. For this simulation, the SWBLI unsteadiness has been observed. Results suggest that the dominant flapping mode of the recirculation bubble occurs at medium frequency. These cycles of successive enlargement and shrinkage of the separated zone are shown to be irregular in time, the maximum size of the recirculation bubble being submitted to discrepancies between successive cycles. This behaviour of the separation bubble is responsible for a low frequency temporal modulation of the amplitude of the separation and reattachment point motions and thus for the low frequency breathing of the separation bubble. These results tend to suggest that the SWBLI unsteadiness is related to this low frequency dynamics of the recirculation bubble; the oscillations of the reflected shocks foot being in phase with the motion of the separation point.
Book Synopsis A Numerical Study of Normal-shock/turbulent Boundary Layer Interactions by : Lowell C. Keel (MAJ, USAF.)
Download or read book A Numerical Study of Normal-shock/turbulent Boundary Layer Interactions written by Lowell C. Keel (MAJ, USAF.) and published by . This book was released on 1979 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of an Oblique Shock Wave/turbulent Boundary Layer Interaction with Continuous Suction by : Driss Benhachmi
Download or read book Experimental and Numerical Investigation of an Oblique Shock Wave/turbulent Boundary Layer Interaction with Continuous Suction written by Driss Benhachmi and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulation of Three-dimensional Shockwave/turbulent-boundary-layer Interaction by : A. W. C. Leung
Download or read book Numerical Simulation of Three-dimensional Shockwave/turbulent-boundary-layer Interaction written by A. W. C. Leung and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulation of Low-Density Shock-Wave Interactions by : Christopher E. Glass
Download or read book Numerical Simulation of Low-Density Shock-Wave Interactions written by Christopher E. Glass and published by . This book was released on 1999 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: CFD numerical simulations of low-density shock-wave interactions for an incident shock impinging on a cylinder have been performed. Flow-field density gradient and surface pressure and heating define the type of interference pattern and corresponding perturbations. The maximum pressure and heat transfer level and location of various interaction types are presented. A time-accurate solution of the Type IV interference is employed to demonstrate the establishment and the steadiness of the low-density flow interaction.
Book Synopsis Preliminary Numerical Analysis of the Interaction of an Oblique Shock Wave and Laminar Boundary Layer by : Victor J. Skoglund
Download or read book Preliminary Numerical Analysis of the Interaction of an Oblique Shock Wave and Laminar Boundary Layer written by Victor J. Skoglund and published by . This book was released on 1965 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
