Thermal effects of a sonic jet fire impingement on a pipe |
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Institution: | 1. INAOE, Luis Enrique Erro 1, Tonantzintla, Puebla C.P. 72840, Mexico;2. Universidad de las Américas Puebla, Ex Hacienda Sta, Catarina Mártir S/N, San Andrés Cholula, Puebla C.P. 72810, Mexico;1. Fundacion Universidad de las Americas Puebla, Department of Chemical, Food and Environmental Engineering, Puebla, Mexico;2. Eurisko Consulting, Patrimonio Mundial 7, Aranjuez, Spain;1. Tecnologico de Monterrey, School of Engineering and Sciences, Mexico;2. Universidad de las Américas Puebla, Department of Business Administration, Mexico;3. Chonnam National University, Department of Economics, Gwangju, South Korea;1. Optics Department, Instituto Nacional de Astrofisica, Óptica y Electónica, 1 Luis Enrique Erro, 72840 Tonantzintla, Pue., Mexico;2. Universidad de las Americas, Ex-Hacienda Santa Catarina Mártir, 72810 San Andrés Cholula, Pue., Mexico;1. Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, CDMX, 07738, Mexico;2. Department of Actuarial Sciences, Physics and Mathematics, Universidad de las Américas Puebla, San Andrés Cholula, Puebla, 72810, Mexico;3. ESIME-Zacatenco, Instituto Politécnico Nacional, CDMX, 07738, Mexico |
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Abstract: | Although the effects of jet fires are often limited to rather short distances, if their flames impinge on a pipe or a vessel collapse can occur in very short times. In such cases, the heat flux on the affected equipment is very high and wall temperature can increase very rapidly. This can happen in parallel pipelines, if a release occurs and impinges on another one. Nevertheless, jet fire impingement has been scarcely studied. In this communication the results obtained from an experimental set-up are presented. Sonic jet fires impinged on a pipe containing stagnant air or water. The temperatures of the flames impinging on it were measured for the worst case (flame front-bright zone), as well as the evolution with time of the pipe wall temperature at different locations. Initial temperature increases up to around twenty °C/s were registered for the air inside, with maximum values of up to 600 °C reached in 2.5 min, and 800 °C in approximately 9 min. In the case of pipe containing water, in the zone of the wall in contact with the liquid the heating rates were much lower, the maximum temperature reached being up to approximately 150 °C. From the temperatures of the jet flames and of the pipe, the heat fluxes reaching the pipe and the corresponding heat transfer coefficients were obtained. The results obtained emphasized that safe distances are essential in pipelines, together with fire proofing and other safety measures. |
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Keywords: | Jet fire Flame impingement Domino effect Heat flux Heat transfer coefficient |
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