fire-fighting water curtain, equivalent diameter of droplets, thermal radiation shielding


This work represents further development of earlier received results of simulation of water curtains used as fire protection walls. Subject of the theoretical analysis is the flat fan sprays which flow from the slot-hole sprinkler. The central objective of the study is to develop calculation method of one of the main parameters of this mathematical model. It is such parameter as the equivalent diameter of droplets of the sprayed water stream. Earlier there was no such calculation procedure, and determination of this parameter was made by means of the difficult experimental measurements. Approach. In this study earlier published literary data are applied to calculation of this parameter. The formula received in the work allows carrying out calculation of called parameter on the basis of design characteristics of drencher installation. The graphic dependences constructed on the formula allowed defining dependence of the equivalent diameter of droplets of the sprayed stream on technical parameters. Findings. Application of this formula to earlier developed mathematical model of thermal shielding allowed expanding its opportunities for practical use. This model can be used for designing of water curtains of fire-prevention appointment, and also for definition of optimum modes of their operation.

Author Biographies

Анатолий Григорьевич Виноградов, The Bohdan Khmelnytskyy National University of Cherkasy

Physics Department, associate professor

Олег Михайлович Яхно, National Technical University of Ukraine «Kyiv Polytechnic Institute», Kyiv

Кафедра прикладной гидроаэромеханики и механотроники, профессор


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Original study