Computational Fluid Dynamics Algorithms for Unsteady Shock-Induced Combustion, Part 1: Validation
Computational Fluid Dynamics Algorithms for Unsteady Shock-Induced Combustion, Part 1: Validation
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DOI：
10.2514/2.1087
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发表时间：
2000
期刊：
影响因子：
2.5
通讯作者：
Jeong-Yeol Choi;I. Jeung;Y. Yoon
中科院分区：
文献类型：
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作者：
Jeong-Yeol Choi;I. Jeung;Y. Yoon
进行了一项计算研究，以开发一个全隐式和时间精确的计算eid流体动力学代码的反应流系统的分析。在化学计量的氢-空气混合物中，钝头体周围的周期性振荡激波诱导燃烧被用作检查各种数值考虑的验证问题。化学反应流的控制方程采用欧拉方程和组分守恒方程。空间离散的控制方程是基于Roe的近似黎曼解与MUSCL型总变差递减格式的高阶空间分辨率。二阶精度的时间积分方法是基于一个低-高阶Gauss-Seidel格式，使用Newton子迭代法和Steger-Warming e ux Jacobian分裂。作为验证过程的第一步，对实验结果进行了模拟，以验证基线方法的可靠性。在下一步中，基线方法的一般方面进行了检查，包括时间积分的顺序，子迭代的数量，并使用近似eux雅可比分裂。网格系统的适当性也通过使用网格单元研究进行了检查。
Acomputational study is carried out to develop a fully implicit and time-accuratecomputational e uid dynamics code for the analysis of reactive e ow systems. Periodically oscillating shock-induced combustion around a blunt body in a stoichiometric hydrogen ‐air mixture is used as a validation problem of examining various numerical considerations. Euler equations and species conservation equations are used as the governing equations for the chemically reacting e ow. Spatial discretization of the governing equation is based on Roe’ s approximate Riemann solver with a MUSCL-type total variation diminishing scheme for higher-order spatial resolution. The secondorder-accuratetimeintegrationmethodisbasedonalower ‐uppersymmetricGauss ‐Seidelscheme,usingaNewton subiteration method and Steger ‐Warming e ux Jacobian splitting. As a e rst step of the validation procedure, simulations of experimental results were carried out to cone rm the reliability of the baseline method. In the next step, the general aspects of the baseline method were examined, including order of time integration, number of subiterations, and use of approximate e ux Jacobian splitting. Appropriateness of the grid system is also examined by using a grid ree nement study.