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DOI: 10.5445/IR/1000086072
Veröffentlicht am 27.09.2018

Pneumatic Atomization: Beam-Steering Correction in Laser Diffraction Measurements of Spray Droplet Size Distributions

Wittner, Marc O.; Karbstein, Heike; Gaukel, Volker

Abstract (englisch):
Laser diffraction is among the most widely used methods for spray droplet size measurements. However, the so-called beam-steering effect must be considered when pneumatic atomizers are used for droplet generation. The beam-steering effect is a systematic measurement error, leading to the detection of apparent large spray droplets due to gradients in the refractive index of the gas phase. The established correction method is based on the reduction of the laser diffraction system’s measurement range by deactivation of detectors, relevant for the detection of large droplets. As this method is only applicable when size ranges of real and apparent droplet sizes are clearly different, an alternative method for beam-steering correction is introduced in the presented study. It is based on a multimodal log-normal fit of measured spray droplet sizes. The modality representing the largest droplets is correlated to the beam-steering effect and therefore excluded from the measured size distribution. The new method was successfully applied to previously published droplet size distribution measurements of an internal mixing Air-Core-Liquid-Ring (A ... mehr

Zugehörige Institution(en) am KIT Institut für Bio- und Lebensmitteltechnik (BLT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2076-3417
URN: urn:nbn:de:swb:90-860723
KITopen-ID: 1000086072
Erschienen in Applied Sciences
Band 8
Heft 10
Seiten Article: 1738
Projektinformation BMWi, 18299 N/1
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 26.09.2018
Schlagworte beam-steering effect; laser diffraction; pneumatic atomization; ACLR; multimodal log-normal distribution
Nachgewiesen in Web of Science
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