An experimental study on the influence of single-layer wire mesh on premixed methane-air flame behavior and pressure dynamics in a closed duct is conducted. Premixed methane-air mixture with equivalence ratio Φ = 1 is used in our experiments. Seven different kinds of wire mesh are chosen. Highspeed schlieren photography system is applied to capture flame behaviors. Two pressure transducers are used to record the pressure-time history. It is found that the flame propagates through the wire mesh in the cases of 12 and 20 mesh, but quenches in the case of 30 mesh. For the cases of 40, 60, 80, and 100 mesh, the flame presents salient quenching tendency but finally propagates through the suppression zone with wire mesh being destroyed, which fully demonstrates that the anti-destructive performance of wire mesh should be also considered in particular. Moreover, it is found that the single-layer wire mesh can directly influence the flame behavior. The single-layer wire mesh makes the tulip flame formation time advanced and makes the flame front inversion extent weaker compared with the case of no wire mesh. In addition, it is found that the single-layer wire mesh has no suppression effect on flame tip speed in the upstream duct, but delays the flame propagation in the suppression zone. Besides, the single-layer wire mesh can effectively suppress the maximum pressure, and the suppression effect increases as the increase of mesh of wire mesh. Finally, all of the potential mechanisms of the influence of single-layer wire mesh on premixed methane-air flame behavior, flame tip speed, and pressure are analyzed in this paper.

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>.