Publication detail
INTERACTION OF THE AIR WITH LIQUID IN PRESSURE-SWIRL SPRAYS
JEDELSKÝ, J. MALÝ, M. JÍCHA, M. DEL CORRAL, N.
Czech title
Interakce kapek se vzduchem v tlakových vířivých sprejích
English title
INTERACTION OF THE AIR WITH LIQUID IN PRESSURE-SWIRL SPRAYS
Type
abstract
Language
en
Original abstract
The flow field in a spray produced by a pressure-swirl (PS) atomizer was studied using Phase-Doppler Anemometry (PDA). A Stokes number (Stk) analysis of the sprayed droplets showed that droplets < 5 µm followed the airflow so were used to provide estimates of the local air velocity. The Stk increases with drop size; even 20–40 µm sized droplets (Stk ~ 1) are partially affected by the air flow while the largest ones (80–160 µm, Stk > 10) move ballistically. The liquid and gas flow fields were compared in terms of the mean and rms velocities. The airflow, inside the hollow-cone spray, was found to be highly anisotropic and spatially varying within three distinct regions. Spatially resolved TKE and MKE of the air and spectra of the droplet velocity fluctuations are detailed in the paper.
Czech abstract
Interakce kapek se vzduchem v tlakových vířivých sprejích, měření provedeno pomocí dopplerovského analyzátoru, více informací v anglické verzi.
English abstract
The flow field in a spray produced by a pressure-swirl (PS) atomizer was studied using Phase-Doppler Anemometry (PDA). A Stokes number (Stk) analysis of the sprayed droplets showed that droplets < 5 µm followed the airflow so were used to provide estimates of the local air velocity. The Stk increases with drop size; even 20–40 µm sized droplets (Stk ~ 1) are partially affected by the air flow while the largest ones (80–160 µm, Stk > 10) move ballistically. The liquid and gas flow fields were compared in terms of the mean and rms velocities. The airflow, inside the hollow-cone spray, was found to be highly anisotropic and spatially varying within three distinct regions. Spatially resolved TKE and MKE of the air and spectra of the droplet velocity fluctuations are detailed in the paper.
Keywords in Czech
Stokes number, pressure-swirl (PS) atomizer, droplets
Keywords in English
Stokes number, pressure-swirl (PS) atomizer, droplets
Released
30.07.2015
Publisher
The University of Melbourne
Location
Melbourne, Australia
Edition number
1
Pages from–to
1–6
Pages count
6