NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Drop size distribution and air velocity measurements in air assist swirl atomizer spraysDetailed measurements of mean drop size (SMD) and size distribution parameters have been made using a Fraunhofer diffraction particle sizing instrument in a series of sprays generated by an air assist swirl atomizer. Thirty-six different combinations of fuel and air mass flow rates were examined with liquid flow rates up to 14 lbm/hr and atomizing air flow rates up to 10 lbm/hr. Linear relationships were found between SMD and liquid to air mass flow rate ratios. SMD increased with distance downstream along the center line and also with radial distance from the axis. Increase in obscuration with distance downstream was due to an increase in number density of particles as the result of deceleration of drops and an increase in the exposed path length of the laser beam. Velocity components of the atomizing air flow field measured by a laser anemometer show swirling jet air flow fields with solid body rotation in the core and free vortex flow in the outer regions.
Document ID
19870046666
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mao, C.-P.
(Carnegie-Mellon Univ. Pittsburgh, PA, United States)
Oechsle, V.
(Carnegie-Mellon Univ. Pittsburgh, PA, United States)
Chigier, N.
(Carnegie-Mellon University Pittsburgh, PA, United States)
Date Acquired
August 13, 2013
Publication Date
March 1, 1987
Publication Information
Publication: ASME, Transactions, Journal of Fluids Engineering
Volume: 109
ISSN: 0098-2202
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
87A33940
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available