Abstract
This report describes experimental work with the objective of implementing laser based techniques for measuring gas velocity and particle size in large scale pulverized coal combustion system. Two laser diagnostic techniques are considered: LDA (Laser Doppler Anemometry) for velocity measurements and PSV (Particle Size Velocimetry) for simultaneous particle size and velocity measurements. The LDA-instrumentation consists of an open beam, backscatter system providing 2-dimensional velocimetry and the PSV-instrumentation consists of a forward scattering system for simultaneous 1-dimensional velocimetry and particle sizing. The PSV-instrument can be operated either in a basic open laser beam geometry or with a fibre-optic probe option. The work of implementing the laser techniques to a large scale combustion system included tests and measurements with the laser equipment on a medium scale (o.5-1.3 MW) pulverized coal fired tunnal furnace. Results from LDA measurements are presented in terms of flow velocity profiles obtained successfully at the entire reach of the LDA system in the furnace, except beyond heavily coal particle laden flame regions. Size classified test particles were retrieved successfully from PSV measurements on non-swirled furnace flows, but the requirement of a frequency shift for measurements on swirled flows was demonstrated. The influence of beam steering on the basic
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Citation Formats
Andersen, S A, and Clausen, S.
Practical applications of laser based measuring techniques.
Denmark: N. p.,
1992.
Web.
Andersen, S A, & Clausen, S.
Practical applications of laser based measuring techniques.
Denmark.
Andersen, S A, and Clausen, S.
1992.
"Practical applications of laser based measuring techniques."
Denmark.
@misc{etde_10129688,
title = {Practical applications of laser based measuring techniques}
author = {Andersen, S A, and Clausen, S}
abstractNote = {This report describes experimental work with the objective of implementing laser based techniques for measuring gas velocity and particle size in large scale pulverized coal combustion system. Two laser diagnostic techniques are considered: LDA (Laser Doppler Anemometry) for velocity measurements and PSV (Particle Size Velocimetry) for simultaneous particle size and velocity measurements. The LDA-instrumentation consists of an open beam, backscatter system providing 2-dimensional velocimetry and the PSV-instrumentation consists of a forward scattering system for simultaneous 1-dimensional velocimetry and particle sizing. The PSV-instrument can be operated either in a basic open laser beam geometry or with a fibre-optic probe option. The work of implementing the laser techniques to a large scale combustion system included tests and measurements with the laser equipment on a medium scale (o.5-1.3 MW) pulverized coal fired tunnal furnace. Results from LDA measurements are presented in terms of flow velocity profiles obtained successfully at the entire reach of the LDA system in the furnace, except beyond heavily coal particle laden flame regions. Size classified test particles were retrieved successfully from PSV measurements on non-swirled furnace flows, but the requirement of a frequency shift for measurements on swirled flows was demonstrated. The influence of beam steering on the basic PSV system was observed but due to technical problems no measurements were obtained with the probe option. (au).}
place = {Denmark}
year = {1992}
month = {Nov}
}
title = {Practical applications of laser based measuring techniques}
author = {Andersen, S A, and Clausen, S}
abstractNote = {This report describes experimental work with the objective of implementing laser based techniques for measuring gas velocity and particle size in large scale pulverized coal combustion system. Two laser diagnostic techniques are considered: LDA (Laser Doppler Anemometry) for velocity measurements and PSV (Particle Size Velocimetry) for simultaneous particle size and velocity measurements. The LDA-instrumentation consists of an open beam, backscatter system providing 2-dimensional velocimetry and the PSV-instrumentation consists of a forward scattering system for simultaneous 1-dimensional velocimetry and particle sizing. The PSV-instrument can be operated either in a basic open laser beam geometry or with a fibre-optic probe option. The work of implementing the laser techniques to a large scale combustion system included tests and measurements with the laser equipment on a medium scale (o.5-1.3 MW) pulverized coal fired tunnal furnace. Results from LDA measurements are presented in terms of flow velocity profiles obtained successfully at the entire reach of the LDA system in the furnace, except beyond heavily coal particle laden flame regions. Size classified test particles were retrieved successfully from PSV measurements on non-swirled furnace flows, but the requirement of a frequency shift for measurements on swirled flows was demonstrated. The influence of beam steering on the basic PSV system was observed but due to technical problems no measurements were obtained with the probe option. (au).}
place = {Denmark}
year = {1992}
month = {Nov}
}