CROSS-FLOW MIXING OF NONCIRCULAR JETS

Citation
Ds. Liscinsky et al., CROSS-FLOW MIXING OF NONCIRCULAR JETS, Journal of propulsion and power, 12(2), 1996, pp. 225-230
Citations number
48
Categorie Soggetti
Aerospace Engineering & Tecnology
ISSN journal
07484658
Volume
12
Issue
2
Year of publication
1996
Pages
225 - 230
Database
ISI
SICI code
0748-4658(1996)12:2<225:CMONJ>2.0.ZU;2-P
Abstract
An experimental investigation has been conducted of the isothermal mix ing of a turbulent jet injected perpendicular to a uniform crossflow t hrough several different types of sharp-edged orifices. Jet penetratio n and mixing was studied using planar Mie scattering to measure time-a veraged mixture fraction distributions of circular, square, elliptical , and rectangular orifices of equal geometric area injected into a con stant velocity crossflow. Hot-wire anemometry was also used to measure streamwise turbulence intensity distributions at several downstream p lanes. Mixing effectiveness was determined using 1) a spatial unmixedn ess parameter based on the variance of the mean jet concentration dist ributions and 2) by direct comparison of the planar distributions of c oncentration and of turbulence intensity. No significant difference in mixing performance was observed for the six configurations based on c omparison of the mean properties.