Atomization and Sprays Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

For Online Access

Best Paper Award Selection - Editorial Board Site

2008, Volume18

Issue 8

126 pages

DOI: 10.1615/AtomizSpr.v18.i8

Issue price - $118.00

Victor Chernov
Faculty of Aerospace Engineering, Technion IIT, Haifa 32000, Israel

Benveniste Natan
Faculty of Aerospace Engineering, Technion−Israel Institute of Technology, Haifa, Israel

Gels are non-Newtonian fluids that exhibit shear thinning behavior, and in general, they are more difficult to atomize in comparison to the liquids they are based on. To improve the gel spray characteristics, periodic disturbances were introduced on the atomized fluid jet, at the exit plane of a triplet air-blast atomizer. An experimental system that imposed periodic, constant-amplitude disturbances with controllable frequencies between 100 and 1100 Hz was designed and built. Water and water-based carbopol gels were used as atomized fluids at flow rates between 5 and 22 g/s. In most cases, the experiments showed a reduction in the Sauter mean diameter of the spray between 25% and 60%, depending on the gellant content, mass flow rate, and air-to-liquid ratio. In an originally bimodal spray, an increasing dominance of the small droplet mode with increasing disturbance frequency was observed.

DOI: 10.1615/AtomizSpr.v18.i8.30 Download article, 723-738 pages

Article price - $35.00

<< Previous article   Next article >>