Turbulence And Transition In Supersonic And Hypersonic Flows
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Turbulence and Transition in Supersonic and Hypersonic Flows
Turbulence and Transition in Supersonic and Hypersonic Flows explains how to understand and mathematically model these phenomena, with an emphasis on the unique challenges and features that the compressibility of the fluid introduces. This timely book responds to an increase in research interest in this topic, explaining how to use the latest numerical methods as well as providing important background theory. It covers both the problem of how a laminar boundary layer transitions to turbulence in the supersonic and hypersonic regime and the problem of how compressibility of a fluid affects turbulence. Compressible flows are important in many areas of engineering, including external aerodynamics, internal flows in propulsion and power generation applications, flows in supercritical fluids, and many others.
Seventh IUTAM Symposium on Laminar-Turbulent Transition
Author: Philipp Schlatter
language: en
Publisher: Springer Science & Business Media
Release Date: 2010-03-11
The origins of turbulent ?ow and the transition from laminar to turbulent ?ow are the most important unsolved problems of ?uid mechanics and aerodynamics. - sides being a fundamental question of ?uid mechanics, there are numerous app- cations relying on information regarding transition location and the details of the subsequent turbulent ?ow. For example, the control of transition to turbulence is - pecially important in (1) skin-friction reduction of energy ef?cient aircraft, (2) the performance of heat exchangers and diffusers, (3) propulsion requirements for - personic aircraft, and (4) separation control. While considerable progress has been made in the science of laminar to turbulent transition over the last 30 years, the c- tinuing increase in computer power as well as new theoretical developments are now revolutionizing the area. It is now starting to be possible to move from simple 1D eigenvalue problems in canonical ?ows to global modes in complex ?ows, all - companied by accurate large-scale direct numerical simulations (DNS). Here, novel experimental techniques such as modern particle image velocimetry (PIV) also have an important role. Theoretically the in?uence of non-normality on the stability and transition is gaining importance, in particular for complex ?ows. At the same time the enigma of transition in the oldest ?ow investigated, Reynolds pipe ?ow tran- tion experiment, is regaining attention. Ideas from dynamical systems together with DNS and experiments are here giving us new insights.
Turbulent Shear Layers in Supersonic Flow
Author: Alexander J. Smits
language: en
Publisher: Springer Science & Business Media
Release Date: 2006-05-11
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.