Accession Number : ADD007890

Title :   Method and Apparatus for Determining Aerosol Size Distributions.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Morrison,Clyde A ; Karayianis,Nick ; Wortman,Donald E

Report Date : 08 Jul 1980

Pagination or Media Count : 5

Abstract : This invention relates to a method and apparatus for determining aerosol size distributions, in which the droplets of an aerosol region are placed in an amplitude modulated electric field, which produces resonant elongation and contraction of particularly sized droplets, in the form of mechanical oscillations, depending on the modulating frequency of the modulated electric field. A light beam is directed against the oscillating droplets and scattered thereby, with the intensity of the scattered light beam varying as a result of the changing reflection surfaces presented by the oscillating droplets. Differently sized drops are sequentially resonantly oscillated by selectively varying the modulation frequency of the electric field, with the varying intensity of the oscillating droplets at each modulation frequency yielding the size distribution of a given aerosol. (Author)

Descriptors :   *Patents, *Aerosols, *Sizes(Dimensions), *Drops, *Light scattering, Distribution, Beams(Radiation), Oscillation, Elongation, Contraction, Electric fields, Frequency modulation

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE