Browse > Article
http://dx.doi.org/10.5762/KAIS.2020.21.4.317

Analysis of Correclations between Flow Rate, Pressure and Average Size of Droplet with Hydraulic Diameter of Water Curtain Nozzle  

Park, Jung Wook (Division of Architecture & Fire Safety, Dong Yang University)
Shin, Yeon Je (Division of Architecture & Fire Safety, Dong Yang University)
You, Woo Jun (Division of Architecture & Fire Safety, Dong Yang University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.4, 2020 , pp. 317-323 More about this Journal
Abstract
In this study, the correlations between flow rate, exhaust pressure, and droplet mean diameter with the shape factor of a water curtain nozzle were investigated. To analyze the flow coefficient and the distribution constant on the effects of the hydraulic diameter, five nozzles (D5W3, D5W6, D5W8, D4W6, and D7W6) were mocked up with a consideration of the internal diameter and width. The results showed that the flow coefficient increased in proportion to the constant 0.79 and 62.8 of the hydraulic diameters according to the diameter. As the nozzle width increased, the average droplet size decreased to the -0.235 exponential of the pressure. The average volume was reduced, in which the size distribution of the volume indeterminate decreased with increasing pressure for the same nozzle of the water-curtain. The distribution constants of droplet increased in proportion to the 0.258 exponential of the hydraulic diameter and 244.21. These results are expected to be useful to the design of pressure, flow meter, and average droplet size from a water curtain nozzle to predict the flow characteristics.
Keywords
Nozzle; Water-Curtain; Flow-Rate; Droplet-Size; Hydraulic-Diameter; Shape-Factor;
Citations & Related Records
연도 인용수 순위
  • Reference
1 F. Tamanini, "A Numerical Model for One-Dimensional Heat Conduction with Pyrolysis in a Slab of Finite Thickness", in Appendix A of Factory Mutual Research Corporation Report No. 21011.7, Factory Mutual Research, USA. DOI: https://doi.org/10.1016/S0082-0784(79)80103-4
2 W. Yang, T. Parker, H. D. Ladouceur, R. J. Kee, "The interaction of thermal radiation and water mist in fire suppression", Fire safety journal, Vol.39 No.1 pp.41-66, Feb. 2004. DOI: https://doi.org/10.1016/j.firesaf.2003.07.001   DOI
3 W. J. You, H. S. Ryou, "Development and application of a simplified radiative transport equation in water curtain systems", Fire Safety Science, Vol. 96, pp.124-133, Mar. 2018. DOI: https://doi.org/10.1016/j.firesaf.2017.11.002   DOI
4 W. J. Parker, "Prediction of the Heat Release Rate of Douglas Fir", Proceedings of the Second International Symposium, Fire Safety Science, New York, pp.337-346, 1989. DOI: http://dx.doi.org/10.3801/IAFSS.FSS.2-337
5 K. B. McGrattan, R. J. McDermott, C. G. Weinschenk, G. P. Forney, "FDS Technical Reference guide", p.309, NIST, 2013, Sixth Edition, pp.309 DOI: https://doi.org/10.6028/NIST.sp.1018
6 J. G. Quintiere, "Fundamentals of fire phenomena", p.439, John Wiley & Sons, 2006, pp.439 DOI: http://dx.doi.org/10.1002/0470091150
7 N. Semenov, "Chemical Kinetics and Chain Reactions", p.480, Oxford, 1935, pp.480 DOI: https://doi.org/10.1038/151185a0
8 D. A. Frank-Kamenetskii, "Diffusion and Heat Exchange in Chemical Kinetics", p. 370, Princeton, pp. 370 DOI: http://dx.doi.org/10.1515/9781400877195
9 R. Viskanta, C. C. Tseng, "Spectral radiation characteristics of water sprays", Combustion Theory and Modelling, Vol.11, No.1, pp.113-125, Feb. 2007. DOI: https://doi.org/10.1080/13647830600823175   DOI
10 S. Arrhenius, "On the reaction velocity of the inversion of cane sugar by acids", Zeitschrift fur physikalische Chemie, Vol.4, pp. 226ff, 1889. DOI: http://dx.doi.org/10.1016/B978-0-08-012344-8.50005-2
11 H. Kung, "A Mathematical Model of Wood Pyrolysis", Combustion and Flame, Vol.18, No.2, pp. 185-195, Apr. 1972. DOI: http://dx.doi.org/10.1016/S0010-2180(72)80134-2   DOI
12 G. Heskestad, "Scaling the interaction of water sprays and flames", Fire Safety Journal, Vol.37, No.6, pp.535-548, Sep. 2002. DOI: https://doi.org/10.1016/S0379-7112(02)00012-7   DOI