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Dynamics of Concurrent Flame Spread Over a Thin Charring Solid in Microgravity

机译:并发火焰在微重力下在薄炭化固体上扩散的动力学

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The dynamics of microgravity concurrent flame spread over then cellulosic sheets are theoretically investigated. The mathematical model is based on the laminar, reactive Navier-Stokes equations coupled ot solid-phase enthalpy and mass conservation equation. Simulations have been made for forced flow velocities in the range 0.25-15 cm/s, by decreasing the oxygen mass fraction of the concurrent flow below the ambient value and by increasing the solid charring rate (fire-retarded cellulose). For air, non-retarded cellulose and flow velocites larger than 5 cm/s, the dynamics of concurrent flame spread are qualitatively similar to those of normal gravity.
机译:理论上研究了微重力并发火焰在纤维素板上的动力学。该数学模型基于层流,反应性Navier-Stokes方程以及固相焓和质量守恒方程。通过将并发气流中的氧气质量分数降低到环境值以下并增加固体炭化率(阻燃纤维素),对强制流速在0.25-15 cm / s范围内进行了仿真。对于空气,大于5 cm / s的非阻燃纤维素和流动速度,同时火焰蔓延的动力学在质量上与正常重力相似。

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