Laser Techniques and Applications in Fluid Mechanics: Proceedings of the 6th International Symposium Lisbon, Portugal, 20–23 July, 1992

For this sixth volume 01 proceedings stemming lrom a Symposium on the Applications 01 Laser Techniques to Fluid Techniques, we have selected thirty one papers which are presented in live chapters. They represent some 01 the best papers presented at the Sixth Symposium which was again held at the Calouste Gulbenkian Foundation in Lisbon, this time lrom 20 to 23 July 1992. The total number of papers at the Symposium was slightly larger than in 1990 and was selected from a much increased number of abstracts, with a considerably smaller of accepted manuscripts. Thus, this volume represents some 01 the best 01 the best. The topics we have chosen to include are Laser Anemometer Optics and Processing, Two-Phase Flow Instrumentation, Whole-Field Velocimetry, Complex Flow Applications and Engine and Combusting Flows, and they show that there continues to be a healthy interest in the development 01 understanding of the methodology and its implementation in terms 01 new instrumentation, and this is emphasised by the increasing number 01 companies which have attended the Symposium in recent years in order to demonstrate their range 01 products. At the same time, it is clear that there is an increasing range of applications 01 the corresponding laser techniques and this is represented, in part, by the chapters concerned with Complex and Engine and Combusting Flows. In general, we are very pleased with the way the application 01 laser techniques has grown and hope that this se ries 01 Symposia has played its part.

Table of Contents:
I — Laser Anemometer Optics and Processing.- A New Method for Directional LDA-Velocity Measurement of Lateral and Axial Components Using Diffraction Gratings.- A Novel Concept in Laser Doppler Velocimetry: The Distributed LDV.- Recent Developments of Fibre Optic Components for LDV Signals.- Processing of a Simulated Differential Doppler-like Signal Using a Fibre-optic-based Multichannel Digital Correlator.- A Multi-Angle Laser-Two-Focus Velocimeter Using Photo Diode Arrays.- II — Two-Phase Flow Instrumentation.- Trajectory Dependent Scattering in Phase Doppler Interferometry: Minimizing and Eliminating Sizing Errors.- Droplet and Particle Sizing Using the Dual-Cylindrical Wave and the Planar Phase Doppler Optical Systems Combined with a Transputer Based Signal Processor.- A Complementary Method for Simultaneous Measurement of Size and Velocity.- Pulse Displacement Technique to Measure Particle Size and Velocity in High Density Applications.- Size-Discriminated Velocity Cross-Correlation Measured by a Single Channel Phase Doppler Velocimeter.- A New Laser Grating Velocimeter-Granulometer for Highly Concentrated Wet Steam Flows.- III — Whole Field Velocimetry.- Transition from Particle Image Velocimetry to Laser Speckle Velocimetry with Increasing Seeding Density.- Neural Net for Recognition of Trajectories in a Flow.- Data Validation for Particle Image Velocimetry.- Processing Speed of Photorefractive Optical Correlators in PIV-Processing.- PIV Measurements of Turbulent and Chaotic Structures in a Rotating Flow Using an Optical Correlator.- Observations on the Near Wake of a Yawed Circular Cylinder.- Measurements with Particle Image Velocimetry on Fully Developed Turbulent Pipe Flow at Low Reynolds Number.- IV — Complex-Flows Applications.- LDV Measurements in aPlane Wall Jet in a Large Enclosure.- Measurements of Flow Mechanism in Fluidic Gas Meters by LDV.- Three Component Doppler Global Velocimeter Measurements of the Flow Above a Delta Wing.- Phase-Coupled LDV and Plezo-Array Measurements in Unsteady Flows.- Measurements of Flow Around Marine Propellers.- Flow Around a Surface-Mounted Cube.- Mie Scattering and Laser-Induced Fluorescence Measurements of Scalar Mixing in Compressible Free Shear Layers.- Visualization of Organized Structures in Compressible Turbulent Flow by Holographic Interferometry.- V — Engine and Combusting Flows.- Laminar Spray Combustion.- LDA Measurements of Velocity and Turbulent Transport Processes in a 150 KW Baffle-Stabilized Swirling Flame.- Application of a Phase Doppler Anemometer to a Spray Impinging on a Disc.- Phase Doppler Anemometry Measurements on a Gasoline Spray Inside the Inlet Port and Downstream of the Induction Valve; Steady and Unsteady Flow Conditions.- Velocity Measurements in the End-Gas Region During Homogeneous-Charge Combustion in a Spark Ignition Engine.