SYMPOSIA PAPER Published: 01 January 1990

Experimental Investigation of a Fan Spray Using Laser Diffraction and Phase-Doppler Instruments


In the experimental work reported here, laser Doppler anemometry was used for “point” measurements of bivariate distributions of velocity and drop size (LDVS), and diffraction sizemetry (DSM) was used for line-of-sight measurements of drop size in sprays of water. Laser light sheet photographs were used to determine the spray geometry. The measurement positions were chosen so that the mean axes of the horizontal spray planes containing the LDVS measurement points coincided with the axis of the DSM laser beam. In this case, experimental results of DSM and LDVS are comparable, if one takes into account the laws of the conversion of drop flux (LDVS results) into a drop concentration (DSM results). Mean diameters as well as cumulative distributions obtained by LDVS at different measurement locations are compared with corresponding DSM results. Advantages and disadvantages of both methods with respect to spray analysis are discussed.

Author Information

Dannehl, M
University of Bremen, Bremen 33, F. R. Germany
Schöne, F
University of Bremen, Bremen 33, F. R. Germany
Schulte, G
University of Bremen, Bremen 33, F. R. Germany
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Developed by Committee: E29
Pages: 246–256
DOI: 10.1520/STP25425S
ISBN-EB: 978-0-8031-5141-3
ISBN-13: 978-0-8031-1459-3