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http://dx.doi.org/10.5762/KAIS.2015.16.12.8116

Analysis on Rainfall Distribution in a Large Experimental Rainfall Simulator with Fixed Nozzle Arrangement  

Lee, Chan-Joo (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
Kim, Jong Pil (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
Lee, Jin-Won (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
Kim, Won (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.16, no.12, 2015 , pp. 8116-8127 More about this Journal
Abstract
This study provides results from the experiment on the rainfall distribution using a large Experimental rainfall simulator with fixed nozzle arrangement. Results from the experiment on the nozzles which are crucial for rainfall simulation show standard errors expressed as percentage are 0.15~0.38% at the indoor flow testing apparatus and 0.37~0.59% at the KICT-ERS. To examine spraying range of the nozzles, radial and triangular rainfall measurement test are done. In the radial test, coefficient of uniformity (CU) lies in 0.348~0.657 in the single nozzle spraying case, while it increases up to 0.854~0.895 in the seven nozzle spraying case. This means increase of both rain rate and uniformity by means of superimposition of spraying. The CU of the triangular test falls to 0.845~0.896. The results from the experiment on the whole-scale of the KICT-ERS show that CU exceeds 0.7 for every case except the one experimental condition where a $1.5{\phi}$ nozzle is used. The CU tends to increase with increasing rainfall intensity. Comparison with the previous studies shows that KICT-ERS provides rainfall distribution above average CU.
Keywords
Experiment; Nozzle; Rainfall simulator; Spatial distribution; Uniformity coefficient;
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Times Cited By KSCI : 5  (Citation Analysis)
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