Numerical Simulation of Curved Flames in Cylindrical Tubes
Numerical Simulation of Curved Flames in Cylindrical Tubes
复制标题
圆柱管内弯曲火焰的数值模拟
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
L. Eriksson
中科院分区：
文献类型：
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作者：
V. V. Bychkovs;M. Golberg;M. Liberman;A. Kleev;L. Eriksson
通过对包括热传导、燃料扩散、粘度和化学动力学在内的完整流体动力学方程组的数值模拟，研究了圆柱管中弯曲火焰锋面的动力学。考虑到问题的柱对称性，将完整的三维方程组简化为二维方程组。研究了火焰速度与管径和燃料膨胀系数的关系。结果表明，与二维弯曲火焰相比，圆柱管火焰锋面的弯曲形状引起的速度增量要大得多。对于窄管，当所有小幅度扰动模式都是稳定的，但仍有可能出现弯曲的静止火焰时，得到了火焰不稳定的强起始区。模拟结果表明，与二维火焰不同，圆柱管内的弯曲火焰不存在最大速度。我..。
Abstract Dynamics of a curved flame front in cylindrical tubes is studied by means of numerical simulation of the complete system of hydrodynamic equations including thermal conduction, fuel diffusion, viscosity and chemical kinetics. The complete three-dimensional system of equations is reduced to a two-dimensional system with the account of cylindrical symmetry of the problem. The dependence of the flame velocity on the tube diameter and the expansion coefficient of the fuel is investigated. It is obtained that the velocity increase due to the curved shape of the flame front is considerably larger for the case of cylindrical tubes compared to the two-dimensional curved flames. The regime of strong initiation of the flame instability is obtained for narrow tubes, when all perturbation modes of small amplitude are stable, but a curved stationary flame is still possible. The simulation results indicate that there is no maximal velocity for curved flames in cylindrical tubes unlike two-dimensional flames. I...