Convergence issues on fully-coupled radiative gas dynamic calculations
Convergence issues on fully-coupled radiative gas dynamic calculations
复制标题
全耦合辐射气体动力学计算的收敛问题
DOI：
10.2514/6.2000-732
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
K. Sawada
中科院分区：
文献类型：
--
作者：
Tomoko Tsuru;K. Sawada
讨论了强辐射高超声速流场全耦合计算中的收敛问题。对一个头部半径为1.5米的轴对称钝体的无粘流进行了计算。考虑了来流马赫数为46.8的情况。辐射传递方程采用先前开发的一个结合了普朗克、罗斯兰和灰气体模型的模型进行求解。辐射热通量进行二维计算。在计算中，控制方程采用隐式时间积分，但辐射源项采用显式处理。结果表明，即使辐射源项采用显式积分，对于具有相当大库朗数的强辐射流场也能获得收敛解。
Convergence problems on the fully-coupled calculation of strongly radiating hypersonic flowfields are discussed. Calculations are conducted for the inviscid flow over an axisymmetric blunt body of 1.5m nose radius. The case of the flow Mach number 46.8 is considered. Radiative transfer equation is solved using a model developed earlier which combines Planck, Rosseland and Gray-gas models. The radiative heat flux is calculated two-dimensionally. In the calculation, the governing equations are integrated in time implicitly, but the radiative source term is treated explicitly. It is shown that converged solution can be obtained for strongly radiating flowfield with considerably large CFL numbers even if the radiative source terms are integrated explicitly.