期刊
EXPERIMENTAL THERMAL AND FLUID SCIENCE
卷 34, 期 8, 页码 1353-1366出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.expthermflusci.2010.06.008
关键词
Water mist; Spray characterization; Atomization degree; Dispersion; Laser-based techniques
资金
- Italian MIUR
- Bettati Antincendio S.r.l.
- Regione Emilia-Romagna
- Fondazione Cassa di Risparmio di Modena
Popularity of water mist is increasing for a variety of applications within the broad areas of fire suppression and surface cooling. The present study has been focused on characterizing the solid-cone water-mist spray produced by a typical atomizer at high operative pressure (in the range 60-80 bar). To this end, an experimental campaign has been conducted, mainly employing optical techniques: drop-size and flux distribution, initial velocity and cone angle have been investigated to provide a quantitative description of atomization and dispersion. Most notably, a laser-diffraction-based instrument (Malvern Spraytec) has been used to evaluate drop size, while velocity field and spray-cone angle have been studied by Particle Image Velocimetry (PIV) technique. Appropriate measurement methodologies have been developed to the purpose. Moreover, a theoretical discussion based on inviscid-fluid assumption is presented and some relations have been evaluated as predictive of the considered parameters. (C) 2010 Elsevier Inc. All rights reserved.
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