加权紧致非线性格式在热化学非平衡流数值模拟中的应用
发布时间：2018-08-31 15:53
【摘要】：高精度格式因其在较低的计算资源消耗下仍能保持足够的精度而在精细流动结构的模拟中具有独特优势。将显式5阶加权紧致非线性格式(WCNS-E-5)引入二维高温非平衡流计算,进行自由流速度5.0~5.7 km/s的高焓风洞和高空条件下的圆柱非平衡流场数值模拟,得到正确的流场参数分布、壁面压力和壁面热流等结果与实验值吻合较好。计算结果表明,WCNS-E-5格式较2阶的MUSCL格式具有更好的热流网格收敛特性。分析并针对算例条件初步解决了高阶格式在刚性化学反应流模拟中的鲁棒性问题,为进一步采用高阶格式开展流场结构更加复杂的热化学非平衡流数值研究奠定了良好基础。
[Abstract]:The high precision scheme has a unique advantage in the simulation of fine flow structure because it can maintain enough precision under low computational resource consumption. The explicit 5-order weighted compact nonlinear scheme (WCNS-E-5) is introduced into the two-dimensional high temperature non-equilibrium flow calculation, and the numerical simulation of the high enthalpy wind tunnel with free flow velocity of 5.0 ~ 5.7 km/s and the cylindrical non-equilibrium flow field at high altitude is carried out, and the correct flow field parameter distribution is obtained. The results of wall pressure and heat flux are in good agreement with the experimental data. The results show that the WCNS-E-5 scheme has better convergence characteristics than the second-order MUSCL scheme. The robustness problem of high-order schemes in rigid chemical reaction flow simulation is analyzed and solved, which lays a good foundation for further numerical study of thermochemical non-equilibrium flows with more complex flow field structure using high-order schemes.
【作者单位】： 国防科技大学航天科学与工程学院;
【基金】：国家自然科学基金资助项目(11572348) 国防科技大学重大应用基础研究资助项目(ZDYYJCYJ20140101)
【分类号】：V211.3
本文编号：2215461
[Abstract]:The high precision scheme has a unique advantage in the simulation of fine flow structure because it can maintain enough precision under low computational resource consumption. The explicit 5-order weighted compact nonlinear scheme (WCNS-E-5) is introduced into the two-dimensional high temperature non-equilibrium flow calculation, and the numerical simulation of the high enthalpy wind tunnel with free flow velocity of 5.0 ~ 5.7 km/s and the cylindrical non-equilibrium flow field at high altitude is carried out, and the correct flow field parameter distribution is obtained. The results of wall pressure and heat flux are in good agreement with the experimental data. The results show that the WCNS-E-5 scheme has better convergence characteristics than the second-order MUSCL scheme. The robustness problem of high-order schemes in rigid chemical reaction flow simulation is analyzed and solved, which lays a good foundation for further numerical study of thermochemical non-equilibrium flows with more complex flow field structure using high-order schemes.
【作者单位】： 国防科技大学航天科学与工程学院;
【基金】：国家自然科学基金资助项目(11572348) 国防科技大学重大应用基础研究资助项目(ZDYYJCYJ20140101)
【分类号】：V211.3
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