论文部分内容阅读
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。
High-precision formats have unique advantages in the simulation of fine-flow structures due to their ability to maintain sufficient accuracy at low computational load. The explicit fifth-order weighted compact nonlinear model (WCNS-E-5) is introduced into the two-dimensional high temperature non-equilibrium flow calculation. The high enthalpy wind tunnel with free flow velocity of 5.0 ~ 5.7 km / s and the cylinder non-equilibrium The numerical simulation of flow field, the correct distribution of flow field parameters, the wall pressure and wall heat flow, are in good agreement with the experimental data. The calculation results show that the WCNS-E-5 scheme has better heat flow convergence than the second-order MUSCL scheme. The robustness of the high-order format in rigid chemical reaction flow simulation is analyzed and solved. The numerical results of numerical simulation of thermomechanical non-equilibrium flow with more complicated flow field structure are further advanced.