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Propagation phenomena of spherically expanding hydrogen-air premixed flames: Simulation by a public open source code

机译：球形膨胀氢气预混火焰的传播现象：公共开放源代码的仿真

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In this simulation,propagation of hydrogen(H2)-air premixed flames was reproduced by using a public open source code OpenFOAM.Not only default solver but also modified one based on a new laminar flame propagation speed model derived from the experiments at Nagaoka University of Technology(NUT)were applied to the simulations.Three-dimensional one-eighth of cubic shaped vessels with two different sizes(0.21m and 0.13m in length)were modeled with mesh sizes of 0.625mm(large model)and 0.5mm(small one).H2-air mixture with a unity equivalence ratio,initial temperature 298K and pressure 101,325Pa was ignited at the center of each model.The simulated H2-air premixed flame by both solvers propagated spherically and the propagation phenomena had good agreement with the experimental results within 0.005s.The wrinkle flame shape which appeared in the model with smaller mesh size was more likely with that observed in the experiments.This is because mesh size has influence on the wrinkle shape formation in the simulations.
机译：在该模拟中，氢气（H 2）的传播 - 空气预混合火焰是通过使用公共的开放源代码OpenFOAM.Not只有默认求解器再现，而且基于从所述实验在长冈大学衍生的新的层状火焰传播速度模型修改一个技术（NUT）被施加到simulations.Three维立方形状的容器的八分之一具有两种不同尺寸（0.21米和在长度0.13米）与0.625毫米（大模型）与0.5mm的网孔尺寸被建模（小一个）具有统一当量比.H2 - 空气混合物，初始温度298K和压力101,325Pa在每个model.The的中心被点燃模拟H2-空气预混火焰由两个解算器传播球形和传播现象曾与吻合0.005s.The皱纹火焰形状内从而出现了具有较小筛目大小的模型实验结果更可能与在experiments.This观察是因为目尺寸对皱纹形状备考影响重刑的模拟。

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