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Influence of dispersed water on combustion characteristics of gaseous mixtures
https://doi.org/10.22227/0869-7493.2026.35.03.13-26
Abstract
Introduction. The combustion characteristics of gaseous mixtures in water sprays are analyzed. The relevance of this study is attributable to the wider use of dispersed water to reduce the explosion hazard associated with accidental releases of flammable gases. The aim of this work is to provide an analytical review of studies on the influence of dispersed water on the explosion characteristics of flammable gaseous mixtures.
Analysis of studies addressing the phlegmatizing effect of dispersed water. Droplet size is shown to be the key parameter determining the phlegmatizing effect of dispersed water. Phlegmatization is observed at droplet sizes below 20–30 µm. Phlegmatization reduces the maximum explosion pressure, the explosion pressure rise rate, and the normal burning velocity. However, complete phlegmatization is generally attainable only for near-limit mixtures. Water droplets with diameters up to 1,000 µm can be used to suppress gaseous detonation due to the fragmentation of large droplets in a shock wave.
Analysis of studies reporting the combustion-promoting effect of dispersed water. Combustion intensification was observed under the action of water droplets larger than 50 µm; this effect was accompanied by flame acceleration and more complete combustion. In some cases, combustion-to-detonation transition can occur.
Conclusions. Based on the analysis performed, conditions are identified under which dispersed water can intensify or suppress the combustion of gaseous mixtures.
About the Author
Yu. N. Shebeko
All-Russian Research Institute for Fire Protection of Ministry of Russian Federation for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters
Russian Federation
Russian Federation
Yury N. SHEBEKO, Dr. Sci. (Eng.), Professor, Chief Researcher
VNIIPO, 12, Balashikha, Moscow Region, 143903
RSCI AuthorID: 47042, Scopus: 7006511704
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Review
For citations:
Shebeko Yu.N. Influence of dispersed water on combustion characteristics of gaseous mixtures. Pozharovzryvobezopasnost/Fire and Explosion Safety. 2026;35(3):13-26. (In Russ.) https://doi.org/10.22227/0869-7493.2026.35.03.13-26
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