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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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International Seminar on Fire and Explosion Hazards (9; 2019; Saint Petersburg, Russia). Proceedings of the Ninth International Seminar on Fire and Explosion Hazards [Электронный ресурс]: 21-26 April 2019, Saint Petersburg, Russia. Vol. 1 / Peter the Great St. Petersburg Polytechnic University, Autonomous Non-Profit Organization "Fire and Explosion Safety", Gefest Holding Ltd ; [edited by A. Snegirev [et al.]. — Электрон. текстовые дан. (1 файл : 118 Мб). — Saint Petersburg, 2019. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/k19-45.pdf>. — <URL:http://doi.org/10.18720/SPBPU/2/k19-45>.
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