Rayleigh–Taylor instability: Modelling and effect on coherent deflagrations |
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| Affiliation: | 1. Depto. de Ciencias Ambientales, DICIVA, Universidad de Guanajuato, México;2. Unidad de Ingeniería Avanzada, Centro de Investigación y Estudios Avanzados (CINVESTAV), Av. del Bosque 1145, Zapopan 45019, Jalisco, México;1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;2. Thin Film Centre, Scottish Universities Physics Alliance (SUPA), University of West of Scotland, Paisley PA1 2BE, UK;1. Institute of Microelectronics, Department of Electrical Engineering, National Cheng-Kung University, 1 University Road, Tainan 70101, Taiwan, ROC;2. Department of Chemical Engineering, National Cheng-Kung University, No. 1, University Road, Tainan 70101, Taiwan, ROC;1. Division of Physical Sciences & Engineering and KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;2. Division of Physical Sciences & Engineering and Advanced Membranes and Porous Material Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia |
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| Abstract: | The modelling of Rayleigh–Taylor instability during premixed combustion scenarios is presented. Experimental data obtained from experiments undertaken by FM Global using their large-scale vented deflagration chamber was used to develop the modelling approach. Rayleigh–Taylor instability is introduced as an additional time-dependent, combustion enhancing, mechanism. It is demonstrated that prior to the addition of this mechanism the LES deflagration model under-predicted the experimental pressure transients. It is confirmed that the instability plays a significant role throughout the coherent deflagration process. The addition of the mechanism led to the model more closely replicating the pressure peak associated with the external deflagration. |
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| Keywords: | Deflagration Modelling Rayleigh–Taylor instability Venting |
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