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Applied Optics

Applied Optics


  • Vol. 37, Iss. 10 — Apr. 1, 1998
  • pp: 1752–1761

Response of Phase Doppler Anemometer systems to nonspherical droplets

Nils Damaschke, Gerard Gouesbet, Gerard Gréhan, Hervé Mignon, and Cam Tropea  »View Author Affiliations

Applied Optics, Vol. 37, Issue 10, pp. 1752-1761 (1998)

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The Phase Doppler Anemometer (PDA) technique measures particle diameter assuming sphericity. A means for detecting nonsphericity has usually been implemented in commercial PDA systems to avoid sizing errors if the sphericity assumption is not valid. In the present research the response of standard and planar PDA systems is examined experimentally in more detail by passing nonspherical droplets of known shape through the measurement volume. The effectiveness of nonsphericity detection schemes can be evaluated, and furthermore the influence of the droplet oscillations on the frequency and phase evolution of individual signals can be quantified. The light scattering from such particles has been simulated by using geometric optics, and the computed response of standard and planar PDA systems agrees well with the experimental observations. We conclude with some remarks concerning the possibilities of characterizing the nonsphericity with PDA systems.

© 1998 Optical Society of America

OCIS Codes
(290.5850) Scattering : Scattering, particles
(350.4990) Other areas of optics : Particles
(350.5030) Other areas of optics : Phase

Original Manuscript: May 20, 1997
Revised Manuscript: October 14, 1997
Published: April 1, 1998

Nils Damaschke, Gerard Gouesbet, Gerard Gréhan, Hervé Mignon, and Cam Tropea, "Response of Phase Doppler Anemometer systems to nonspherical droplets," Appl. Opt. 37, 1752-1761 (1998)

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