On-Line Calibration Technique for Laser Diffraction Droplet Sizing Instruments

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Abstract
Laser diffraction (forward scattering) methods for sizing fuel spray droplets in gas turbine applications have been utilized for many years, but a continuing inconvenience with these and all particle sizing techniques is the problem of calibration. This paper discusses the use of photomask reticles to provide a simple, reproducible calibration standard for particle/droplet sizing instruments based on diffraction or imaging methods. Experimental results obtained with prototype standards are presented as well.

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