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Title: Experimental Study on the Combined Effect of Side Walls and Ambient Wind on the Height of Flame Ejected from the Opening of Fire Compartment // Proceedings of the Ninth International Seminar on Fire and Explosion Hazards: 21-26 April 2019, Saint Petersburg, Russia. Vol. 1
Creators: Fang X.; Ren F.; Zhang X. L.; Sun X. P.; Hu L. H.
Organization: University of Science and Technology of China
Imprint: Saint Petersburg, 2019
Collection: Общая коллекция
Document type: Article, report
File type: PDF
Language: English
DOI: 10.18720/SPBPU/2/k19-13
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)
Record key: RU\SPSTU\edoc\61106

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This paper presents an experimental study on the flame height ejected from an opening of fire compartment over the façade constrained by two side walls under ambient wind. Experiments were carried out in a reduced-scale experimental model consisting of a cubic fire compartment with one opening and a façade wall. Two symmetrical side walls were set at the two sides of the opening along the façade, while the opening and the façade were set normal to ambient wind generated by a wind tunnel. The façade flame heights were measured by a CCD camera at various fuel supply rates or heat release rates, wind speeds and side wall separation distances. Results showed that the façade flame height decreased with increase in wind speed, while increased with decrease of side wall separation distance. Ambient wind was shown to affect the façade flame height relatively more significantly than the side walls. A scaling analysis was performed to interpret this behavior based on the air entrainment of the ejected flame under these conditions. Then a global non-dimensional factor K in relation to side wall separation distance, ambient wind speed, two characteristic length scales of the opening as well as the dimensionless excess heat release rate was brought forward to describe the façade flame height in various conditions. The experimental data are shown to be well correlated by the proposed function.

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