Download or read book A Numerical Study of Unsteady Shock written by Christopher John Atkin and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental and numerical study of unsteady shock and detonation waves written by Qiang Yu and published by . This book was released on 1996 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Numerical Study of Unsteady Shock boundary Layer Interactions written by Christopher John Atkin and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Study of Unsteady Shock Waves in Hypersonic Nozzle Flows written by Munetsugu Kaneko and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Study of Unsteady Viscous Hypersonic Blunt Body Flows with an Impinging Shock written by Goetz H. Klopfer and published by . This book was released on 1988 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Study of Unsteady Shockwave Reflections Using an Upwind TVD Scheme written by and published by . This book was released on 1990 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Study of Unsteady Viscous Hypersonic Blunt Body Flows with an Impinging Shock written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-12-29 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complex two-dimensional, unsteady, viscous hypersonic shock wave interaction is numerically simulated by a high-resolution, second-order fully implicit shock-capturing scheme. The physical model consists of a nonstationary oblique shock impinging on the bow shock of a blunt body. Studies indicated that the unsteady flow patterns are slightly different from their steady counterparts. However, for the sample cases investigated the peak surface pressures for the unsteady flows seem to occur at very different impingement locations than for the steady flow cases. Klopfer, G. H. and Yee, H. C. and Kutler, P. Ames Research Center NASA-TM-100096, A-88147, NAS 1.15:100096 ...

Download or read book A Numerical Study of the Unsteady Processes Associated with the Type IV Shock Interaction written by Charles A. Lind and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Study of Unsteady Shock boundary Layer Interaction Induced by a Blunt Fin written by Satoru Yamamoto and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Higher order Numerical Simulation of Unsteady Shock vortex Interactions written by Satoru Yamamoto and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Numerical Simulation of Viscous Unsteady Type IV Shock shock Interaction with Thermochemical Non equilibrium written by Gregory H. Furumoto and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Simulation of Imploding Shock Waves written by Alidad Amirfazli and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical study was made of imploding shock waves. The objective of the present paper is to clarify the propagation and instability of the converging cylindrical and elliptical shock waves. In order to make the simulation, a second order explicit MacCormack type finite difference method was employed to solve the unsteady compressible Euler equations. At first, a one-dimensional simulation was preformed for converging cylindrical shock waves. The results were found to be in good agreement with the Chester, Chisnell and whitham relation. Also, the numerical results were in good agreement with other published 1-D numerical simulations (e.g. method of characteristic). A two-dimensional simulation was also developed for initially perturbed implosions. The governing fluid dynamics equations have been solved in polar coordinates. The 2-D scheme is an extension to the 1-D case, using the operator splitting, where the multi-dimensional solution is evolved from a factored sequence of one dimensional operators. From the two-dimensional study of converging cylindrical shocks, it has been concluded that although the shock has been perturbed initially in the azimuthal direction, it has a tendency to keep its continuous shock front curvature until it gets close to the centre. Eventually, at the centre a break down in the shock front is inevitable. Finally, for the elliptical shock the perturbation parameter ($\xi$) was found to vary with shock travel in a complex manner that cannot be represented by a simple power law. This finding is in good agreement with recent experimental results.

Download or read book A Numerical Study of Fundamental Shock Noise Mechanisms written by Kristine R. Meadows and published by . This book was released on 1995 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study on the Sonic Point in Unsteady Shock Reflections Via Numerical Flowfield Analysis written by Ali Hakkaki-Fard and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A current literature review revealed that unsteady shock reflection is an active research field in terms of the number of still unanswered questions in this area. One of the unresolved aspects of unsteady shock reflection is the relationship between the catch-up and sonic points. In a recent experiment, Skews and Kleine found that the catch-up point is reached at a higher wall angle than the theoretical sonic point predicted by the steady-state two-shock theory. This thesis attempts to shed some light on these matters via numerical flowfield analysis of unsteady shock reflections. Two-dimensional computations are performed using a locally adaptive unstructured unsteady Euler/Navier-Stokes code. At the first stage, a general guideline for numerical modeling of shock wave front structure using the Navier-Stokes equations on adaptive unstructured grid is presented. Obtained results can be directly used for selection of grid resolution required to study shock reflect.

Download or read book Numerical Study on Regular to Mach Reflection Transition in Steady and Unsteady Flows written by Srikumar Srikumar and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "In the present thesis, the transition from regular to Mach reflection in steady and unsteady flows is considered by means of numerical simulations and analytical models. The analytical model by Li and Ben-Dor for the Mach stem height in steady supersonic flow was rederived and a number of typesetting mistakes in the equations of the original Li and Ben-Dor publication were found and corrected. Numerical simulations of oblique shock wave reflection in steady supersonic flows confirmed that the transition from regular to Mach reflection (RR-MR) occurs close to the detachment point and the delay in transition beyond the detachment point depends on grid resolution. However, it was found that to observe the RR-MR transition close to the detachment point extraordinary high grid resolution is required. It is conjectured that this might be related to high reflected shock curvatures close to transition. In all simulations, either a regular reflection or a fully-developed Mach stem was observed. The Mach stem height changes abruptly at transition in contrast to recent findings for pseudosteady flows reported in the literature. Planar shock wave reflection from a convex cylindrical arc was simulated as an example of fully unsteady shock wave reflection. In this case, it was found that there is a delay in transition as compared to the theoretical detachment point. Extrapolation of the obtained results to infinite grid resolution indicates that the delay in transition remains finite but markedly less than such delay for pseudosteady flows provided in the literature. The variation of Mach stem height upon transition is gradual and continuous. " --

Download or read book A Numerical Study of Eno and Tvd Schemes for Shock Capturing written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-28 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The numerical performance of a second-order upwind-based total variation diminishing (TVD) scheme and that of a uniform second-order essentially non-oscillatory (ENO) scheme for shock capturing are compared. The TVD scheme used is a modified version of Liou, using the flux-difference splitting (FDS) of Roe and his superbee function as the limiter. The construction of the basic ENO scheme is based on Harten, Engquist, Osher, and Chakravarthy, and the 2-D extensions are obtained by using a Strang-type of fractional-step time-splitting method. Numerical results presented include both steady and unsteady, 1-D and 2-D calculations. All the chosen test problems have exact solutions so that numerical performance can be measured by comparing the computer results to them. For 1-D calculations, the standard shock-tube problems of Sod and Lax are chosen. A very strong shock-tube problem, with the initial density ratio of 400 to 1 and pressure ratio of 500 to 1, is also used to study the behavior of the two schemes. For 2-D calculations, the shock wave reflection problems are adopted for testing. The cases presented in this report include flows with Mach numbers of 2.9, 5.0, and 10.0. Chang, Shih-Hung and Liou, Meng-Sing Glenn Research Center RTOP 505-62-21...