The Effect of Surface Roughness on the Diffraction of a Shock Wave Around Two-dimensional Blocks

The Effect of Surface Roughness on the Diffraction of a Shock Wave Around Two-dimensional Blocks
Author: David E. Conant
Publisher:
Total Pages: 13
Release: 1954
Genre:
ISBN:

The purpose of these experiments conducted in the shock tube was to obtain qualitative information concerning the effect of various types and degrees of surface roughness on the diffraction of a shock wave about a two-dimensional model. A series of shadowgraphs was taken of the various blocks in the shock tube with incident over-pressure of 6 and 9 psi. Qualitative analysis of the data indicates that surface roughness reduces the velocity of the shock across the top near the rough surface and tends to hinder the developmemt of the front top vortex appreciably, but does not affect the development of the rear vortex to as great an extent.

Shock Wave Interactions

Shock Wave Interactions
Author: Konstantinos Kontis
Publisher: Springer
Total Pages: 408
Release: 2018-03-28
Genre: Technology & Engineering
ISBN: 3319731807

This edited monograph contains the proceedings of the International Shock Interaction Symposium, which emerged as an heir to both the Mach Reflection and Shock Vortex Interaction Symposia. These scientific biannual meetings provide an ideal platform to expose new developments and discuss recent challenges in the field of shock wave interaction phenomena. The goal of the symposia is to offer a forum for international interaction between young and established scientists in the field of shock and blast wave interaction phenomena. The target audience of this book comprises primarily researchers and experts in the field of shock waves, but the book may also be beneficial for young scientists and graduate students alike.

Shock Waves

Shock Waves
Author: Kazuyoshi Takayama
Publisher: Springer Science & Business Media
Total Pages: 735
Release: 2012-12-06
Genre: Science
ISBN: 3642776485

Shock wave research covers important inderdisciplinary areas which range from basic topics on gasdynamics, combustion and detonation, physico-chemistry of high temperature gases, plasma physics, astro and geophysics, materials science, astronautics and space technology to medical and industrial applications. This book includes 202 papers presented at the 18th the International Symposium on Shock Waves which describe the research frontier of shock wave phenopmena and 14 plenary lectures which show the state of the art of various fields of shock wave research. This proceedings is a unique collection of most important and updated shock wave research.

An Experimental Investigation of Shock-wave Diffraction Over Compression and Expansion Corners

An Experimental Investigation of Shock-wave Diffraction Over Compression and Expansion Corners
Author: University of Toronto. Institute for Aerospace Studies
Publisher:
Total Pages: 93
Release: 1968
Genre: Shock waves
ISBN:

The dynamical behaviour of shock waves at high Mach numbers in dissociated oxygen, during a sequence consisting of a diffraction over a compression corner, the subsequent motion through a constant area tube and a final diffraction over an expansion corner is described in some detail. This type of configuration is required to generate a corner-expansion flow over a wall model in a shock tube by means of a liner. The diffraction over the compression corner was found to yield an interesting irregular Mach reflection phenomenon, brought about by a substantial modification of the flow pattern through the internal energies connected with the high density ratios obtained. The initial diffraction results in a strong distortion of the shock front. Some aspects of the subsequent decay of this disturbance towards the stable i.e., plane configuration were investigated. It was found that a very pronounced decrease in stability occurs at high Mach numbers, illustrated by a slow decrease of the axial extent of the shock shapes. Some evidence was obtained in support of the observations made by Bowman on the existence of two distinct shock-distortion regimes. The investigation of the expansion-corner flows were mainly concerned with the effects of the shock distortion on the flow uniformity in cases where the disturbances had not yet fully decayed on arrival at the corner, for example, in some of the recent corner-expansion work done by Drewry. A qualitative assessment shows that the disturbing influence on that investigation was minor. The repercussion on future corner-expansion work in ionized argon was shown to be even less. (Author).

Two-dimensional X-ray Diffraction

Two-dimensional X-ray Diffraction
Author: Bob B. He
Publisher: John Wiley & Sons
Total Pages: 488
Release: 2018-06-26
Genre: Science
ISBN: 1119356105

An indispensable resource for researchers and students in materials science, chemistry, physics, and pharmaceuticals Written by one of the pioneers of 2D X-Ray Diffraction, this updated and expanded edition of the definitive text in the field provides comprehensive coverage of the fundamentals of that analytical method, as well as state-of-the art experimental methods and applications. Geometry convention, x-ray source and optics, two-dimensional detectors, diffraction data interpretation, and configurations for various applications, such as phase identification, texture, stress, microstructure analysis, crystallinity, thin film analysis, and combinatorial screening are all covered in detail. Numerous experimental examples in materials research, manufacture, and pharmaceuticals are provided throughout. Two-dimensional x-ray diffraction is the ideal, non-destructive analytical method for examining samples of all kinds including metals, polymers, ceramics, semiconductors, thin films, coatings, paints, biomaterials, composites, and more. Two-Dimensional X-Ray Diffraction, Second Edition is an up-to-date resource for understanding how the latest 2D detectors are integrated into diffractometers, how to get the best data using the 2D detector for diffraction, and how to interpret this data. All those desirous of setting up a 2D diffraction in their own laboratories will find the author’s coverage of the physical principles, projection geometry, and mathematical derivations extremely helpful. Features new contents in all chapters with most figures in full color to reveal more details in illustrations and diffraction patterns Covers the recent advances in detector technology and 2D data collection strategies that have led to dramatic increases in the use of two-dimensional detectors for x-ray diffraction Provides in-depth coverage of new innovations in x-ray sources, optics, system configurations, applications and data evaluation algorithms Contains new methods and experimental examples in stress, texture, crystal size, crystal orientation and thin film analysis Two-Dimensional X-Ray Diffraction, Second Edition is an important working resource for industrial and academic researchers and developers in materials science, chemistry, physics, pharmaceuticals, and all those who use x-ray diffraction as a characterization method. Users of all levels, instrument technicians and X-ray laboratory managers, as well as instrument developers, will want to have it on hand.

Propagation and Reflection of Shock Waves

Propagation and Reflection of Shock Waves
Author: Fedor Vasil?evich Shugaev
Publisher: World Scientific
Total Pages: 264
Release: 1998
Genre: Science
ISBN: 9789810230104

This volume deals with the propagation of three-dimensional shock waves and their reflection from curved walls. It is divided into two parts. The first part presents a ray method. This is based on the expansion of fluid properties in power series at an arbitrary point on the shock front. Continuous fractions are used. Results for shock propagation in non-uniform fluids are given.The second part discusses the shock reflection from a concave body. The important shock-focusing problem is included. The work is supported by both numerical and experimental results. Many interesting features, such as formation of a jet, vortices and the appearance of disturbances on the shock front, are discussed.Besides shock waves in gases, the distinctive features of shock propagation through a weakly ionized plasma are considered.

Shock Waves Science and Technology Library, Vol. 6

Shock Waves Science and Technology Library, Vol. 6
Author: F. Zhang
Publisher: Springer Science & Business Media
Total Pages: 482
Release: 2012-03-19
Genre: Science
ISBN: 3642229662

This book, as a volume of the Shock Wave Science and Technology Reference Library, is primarily concerned with the fundamental theory of detonation physics in gaseous and condensed phase reactive media. The detonation process involves complex chemical reaction and fluid dynamics, accompanied by intricate effects of heat, light, electricity and magnetism - a contemporary research field that has found wide applications in propulsion and power, hazard prevention as well as military engineering. The seven extensive chapters contained in this volume are: - Chemical Equilibrium Detonation (S Bastea and LE Fried) - Steady One-Dimensional Detonations (A Higgins) - Detonation Instability (HD Ng and F Zhang) - Dynamic Parameters of Detonation (AA Vasiliev) - Multi-Scaled Cellular Detonation (D Desbordes and HN Presles) - Condensed Matter Detonation: Theory and Practice (C Tarver) - Theory of Detonation Shock Dynamics (JB Bdzil and DS Stewart) The chapters are thematically interrelated in a systematic descriptive approach, though, each chapter is self-contained and can be read independently from the others. It offers a timely reference of theoretical detonation physics for graduate students as well as professional scientists and engineers.