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http://dx.doi.org/10.7731/KIFSE.2016.30.6.111

Numerical Analysis of a Liquid Sheet Flow around a Simplified Sprinkler Head Using a CFD Model  

Kim, Sung-Chan (Dept. of Fire Safety, Kyungil Univ.)
Publication Information
Fire Science and Engineering / v.30, no.6, 2016 , pp. 111-117 More about this Journal
Abstract
The present study examined the free surface flow of a liquid sheet near a sprinkler head using a Computational Fluid Dynamics (CFD) model and considered the feasibility of the empirical model for predicting the initial spray characteristics of the sprinkler head through a comparison of the CFD results. The CFD calculation for a simplified sprinkler geometry considering the nozzle and deflector were performed using the commercially available CFD package, CFX 14.0 with the standard $k-{\varepsilon}$ turbulence model and theVolume of Fluid (VOF) method. The predicted velocity of the empirical model at the edge of deflector were in good agreement with that of the CFD model for the flat plate region but there was a certain discrepancy between the two models for the complex geometry region. The mean droplet diameter predicted by the empirical model differed significantly from the measured value of the real sprinkler head. On the other hand, the empirical model can be used to understand the mechanism of droplet formation near the sprinkler head and predict the initial spray characteristics for cases without experimental data.
Keywords
CFD; Sprinkler; Spray model; Volume of fluid; Droplet size;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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