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Turbulent Shear Layers in Supersonic Flow

Turbulent Shear Layers in Supersonic Flow
Author: Alexander J. Smits
Publisher: Springer Science & Business Media
Total Pages: 418
Release: 2006-05-11
Genre: Science
ISBN: 0387263055

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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.


Turbulent Shear-Layer/Shock-Wave Interactions

Turbulent Shear-Layer/Shock-Wave Interactions
Author: J. Delery
Publisher: Springer Science & Business Media
Total Pages: 434
Release: 2013-03-08
Genre: Science
ISBN: 3642827705

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It was on a proposal of the late Professor Maurice Roy, member of the French Academy of Sciences, that in 1982, the General Assembly of the International Union of Theoretical and Applied Mechanics decided to sponsor a symposium on Turbulent Shear-Layer/Shock-Wave Interactions. This sympo sium might be arranged in Paris -or in its immediate vicinity-during the year 1985. Upon request of Professor Robert Legendre, member of the French Academy of Sciences, the organization of the symposium might be provided by the Office National d'Etudes et de Recherches Aerospatiales (ONERA). The request was very favorably received by Monsieur l'Ingenieur General Andre Auriol, then General Director of ONERA. The subject of interactions between shock-waves and turbulent dissipative layers is of considerable importance for many practical devices and has a wide range of engineering applications. Such phenomena occur almost inevitably in any transonic or supersonic flow and the subject has given rise to an important research effort since the advent of high speed fluid mechanics, more than forty years ago. However, with the coming of age of modern computers and the development of new sophisticated measurement techniques, considerable progress has been made in the field over the past fifteen years. The aim of the symposium was to provide an updated status of the research effort devoted to shear layer/shock-wave interactions and to present the most significant results obtained recently.


Effects of Initial Conditions on the Development of Supersonic Turbulent Free Shear Layers

Effects of Initial Conditions on the Development of Supersonic Turbulent Free Shear Layers
Author:
Publisher:
Total Pages: 37
Release: 1989
Genre:
ISBN:

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A start has been made on studying the effects of initial conditions on the development of supersonic turbulent shear layers. The shear layer model and its air supply system have been designed and constructed. Tuning of the air supply control system as well as basic hardware validation were performed. Most of the required instrumentation has been designed and built. Pitot pressure measurements of the undisturbed shear layer have been taken and documented, these results were used as a baseline for the comparison of cases with shock wave impingement. Two types of disturbance have been tested; those generated by shock wave/boundary layer interaction; and those caused by shock wave/shear layer interaction. In the preliminary testing, pitot pressure measurements for the shear layer with disturbance were made only at two streamwise stations. At the last measurement station, the shear layer thickness increases substantially when shock wave/boundary layer interaction occurs upstream of the nozzle lip. Qualitatively, the results indicate that the spreading rate can be enhanced using planar shock wave impingement. Keywords: Supersonic combustion; Scramjet engines.