16 January 1988 Strengths And Limitations Of The Phase Doppler Technique For Simultaneous Measurements Of Particle Velocity And Size
Author Affiliations +
Proceedings Volume 0952, Laser Technologies in Industry; (1988) https://doi.org/10.1117/12.968871
Event: Laser Technologies in Industry, 1988, Porto, Portugal
Abstract
Laser Doppler velocimetry (LDV) is a well-established technique for making non-intrusive measurements of particle velocities in a wide variety of situations. However, the particle velocities so measured are often much more useful if the sizes of the individual particles measured are also known. While it is possible to analyse standard LDV signals to obtain measurements of particle size simultaneously with those of particle velocity in some circumstances, this method is difficult to use on a routine basis. The recent extension of LDV usually known as the phase-Doppler technique has, however, made simultaneous size and velocity measurements much more straightforward. The principles of this method and its strengths and limitations will be discussed. In particular, although in principle the method is restricted to cases where the particles or droplets are nearly spherical, evidence will be presented to show that this restriction can be relaxed if the data is processed suitably. It will be shown that as a by-product of this, it is also possible to extract information about the degree of sphericity of the material studied. Finally, application of this technique to a number of industrially important flows will be considered, and some of the problems encountered will be described.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. M. Livesley, "Strengths And Limitations Of The Phase Doppler Technique For Simultaneous Measurements Of Particle Velocity And Size", Proc. SPIE 0952, Laser Technologies in Industry, (16 January 1988); doi: 10.1117/12.968871; https://doi.org/10.1117/12.968871
PROCEEDINGS
PAGES


SHARE
Back to Top