Laser Techniques for Fluid Mechanics: Selected Papers from the 10th International Symposium Lisbon, Portugal July 10-13, 2000

ISBN-13: 9783540428374 / Angielski / Twarda / 2002 / 566 str.

R. J. Adrian; D. F. G. Durao; R. J. Adrian

Opis

This volume includes revised and extended versions of selected papers presented at the Tenth International Symposium on Applications of Laser Techniques to Fluid Mechanics held in Lisbon in July 2000.
The papers describe instrumentation developments for velocity, scalar and multiphase flows and results of measurements of turbulent flows, and combustion and engines. Focus is placed on laser-Doppler anemometry, particle sizing and other methods for the measurement of velocity and scalars, such as particle image velocimetry and laser induced fluorescence. The application of laser techniques to scientific and engineering fluid flow research was emphasized, but contributions to the theory and practice of laser were also considered where they facilitate new improved fluid mechanic research.

Spis treści

I. Velocity.- I. 1. Light-in-Flight holography with switched reference beams for cross-correlation in deep volume PIV.- I. 2. 3D-PTV experiments of anomalous, steady transport of a conservative tracer in porous media.- I. 3. Investigation of the spatio-temporal flow structure in the log-law region of a turbulentboundary layer by means of multi-plane stereo particle image velocimetry.- I. 4. 3-Component Doppler laser-two-focus velocimetry applied to a transonic centrifugal compressor.- I. 5. Two-point chirp laser Doppler velocimeter using a powerful fibre-coupled green Nd:YAG ring laser.- I. 6. Maximum likelihood approaches for sound field measurement using LDV.- II. Scalar.- H. 1. Experimental investigation of heat transfer phenomena during direct contact condensation in the presence of non condensable gas by means of linear raman spectroscopy.- II. 2. On the accuracy of scalar dissipation measurements by laser Rayleigh scatering.- 11. 3. Demonstration of the applicability of a Background Oriented Schlieren (BOS) method.- II. 4. Transient temperature measurement of unburned gas using optic heterodyne interferometry.- III. Multi-Phase.- III. 1. Generic formulation of a generalized Lorenz-Mie theory for pulsed laser illumination.- III. 2. Measurement and prediction of the gaussian beam effect in the phase Doppler technique.- 11I. 3. Measurements of spray flow by an Improved Interferometer Laser Imaging Droplet Sizing (ILIDS) system.- 11I. 4. Two-dimensional imaging of sizes and number densities of nanoscaled particles.- 11I. 5. Simultaneous measurement of velocity and particle size profiles with the reference beam technique.- 11I. 6. Instantaneous whole field measurement of velocity and size of air microbubbles in two-phase flows using DDPIV.- 11I. 7. Liquid PIV measurements around a single gas slug rising through stagnant liquid in vertical pipes.- 11I. 8. PIV applied to landslide generated impulse waves.- IV. Turbulent Flows.- IV. 1. Behaviour of trailing vortices in the vicinity of the ground.- IV. 2. Investigation of the mixing process in an axisymmetric turbulent jet using PIV and LIP.- IV. 3. LDA- measurements of jets in crossflow for effusion cooling applications.- W. 4. Characterisation of confinement and impingement effects on the near field of axisymmetric jets.- IV. 5. PIV measurements in a co-flowing jets subjected to axial forcing: vorticity and strain field structure.- IV. 6. Laser-optical observation of chaotic mixing structure in a stirred vessel.- IV. 7. Stereoscopic PIV measurement of a lobed jet mixing flow.- IV. 8. Point and planar LIF for velocity-concentration correlations in a jet in cross flow.- IV. 9. Structure of wall-eddies at Re? ? 106.- V. Combustion and Engines.- V. 1. Computer tomography of infra-red absorption and its application to internal-combustion engines.- V. 2. A sensor for measuring CO2 gas temperature and concentration u sing 2?tm DFB semiconductor laser.- V. 3. Measurement of instantaneous 2-D velocity field and local chemiluminescence in a premixed-spray flame by PIV and MICRO system.- V. 4. Phase discrimination inside a spray: LDV measurements using fluorescent seeding particles (FLDV).- V. 5. Effect of strain rate on NOx reduction in an opposed impinging jet flame combustor.- V. 6. Fluid image velocimetry of the flow in the recirculation zone of a bluff body stabilized and controlled burner.- Author Index.

O autorze

Cameron Tropea, geb. 1954, ist derzeit Leiter des Fachgebietes Strömungslehre und Aerodynamik im Fachbereich Maschinenbau an der Technischen Universität Darmstadt, wo er sich vor allem mit Forschung im Bereich der Fluidzerstäubung, der Aerodynamik und der Strömungsmesstechnik befasst. Seine Beschäftigung mit der Bionik umfasst die Aerodynamik des Vogelfluges sowie das Aufprallverhalten von Flüssigkeitstropfen auf strukturierten Oberflächen.