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Title: Feedback mechanism for smart nozzles and nebulizers

Abstract

Nozzles and nebulizers able to produce aerosol with optimum and reproducible quality based on feedback information obtained using laser imaging techniques. Two laser-based imaging techniques based on particle image velocimetry (PTV) and optical patternation map and contrast size and velocity distributions for indirect and direct pneumatic nebulizations in plasma spectrometry. Two pulses from thin laser sheet with known time difference illuminate droplets flow field. Charge coupled device (CCL)) captures scattering of laser light from droplets, providing two instantaneous particle images. Pointwise cross-correlation of corresponding images yields two-dimensional velocity map of aerosol velocity field. For droplet size distribution studies, solution is doped with fluorescent dye and both laser induced florescence (LIF) and Mie scattering images are captured simultaneously by two CCDs with the same field of view. Ratio of LIF/Mie images provides relative droplet size information, then scaled by point calibration method via phase Doppler particle analyzer.

Inventors:
 [1];  [2];  [3]
  1. Potomac, MD
  2. Arlington, VA
  3. Kleinburg, CA
Issue Date:
Research Org.:
George Washington Univ., Washington, DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
985849
Patent Number(s):
7483767
Application Number:
11/247,596
Assignee:
The George Washington University (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01P - MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK
B - PERFORMING OPERATIONS B05 - SPRAYING OR ATOMISING IN GENERAL B05B - SPRAYING APPARATUS
DOE Contract Number:  
FG02-93ER14320
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Montaser, Akbar, Jorabchi, Kaveh, and Kahen, Kaveh. Feedback mechanism for smart nozzles and nebulizers. United States: N. p., 2009. Web.
Montaser, Akbar, Jorabchi, Kaveh, & Kahen, Kaveh. Feedback mechanism for smart nozzles and nebulizers. United States.
Montaser, Akbar, Jorabchi, Kaveh, and Kahen, Kaveh. Tue . "Feedback mechanism for smart nozzles and nebulizers". United States. https://www.osti.gov/servlets/purl/985849.
@article{osti_985849,
title = {Feedback mechanism for smart nozzles and nebulizers},
author = {Montaser, Akbar and Jorabchi, Kaveh and Kahen, Kaveh},
abstractNote = {Nozzles and nebulizers able to produce aerosol with optimum and reproducible quality based on feedback information obtained using laser imaging techniques. Two laser-based imaging techniques based on particle image velocimetry (PTV) and optical patternation map and contrast size and velocity distributions for indirect and direct pneumatic nebulizations in plasma spectrometry. Two pulses from thin laser sheet with known time difference illuminate droplets flow field. Charge coupled device (CCL)) captures scattering of laser light from droplets, providing two instantaneous particle images. Pointwise cross-correlation of corresponding images yields two-dimensional velocity map of aerosol velocity field. For droplet size distribution studies, solution is doped with fluorescent dye and both laser induced florescence (LIF) and Mie scattering images are captured simultaneously by two CCDs with the same field of view. Ratio of LIF/Mie images provides relative droplet size information, then scaled by point calibration method via phase Doppler particle analyzer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {1}
}

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Works referenced in this record:

Factors affecting analyte transport through the sampling orifice of an inductively coupled plasma mass spectrometer
journal, September 2001


XPIV?Multi-plane stereoscopic particle image velocimetry
journal, February 2004


Intracavity technique for improved Raman/Rayleigh imaging in flames
journal, January 1995