| WCNS格式在热化学非平衡流数值模拟中的应用研究 |
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| 引用本文： | 葛明明,曾明,赵小宇.WCNS格式在热化学非平衡流数值模拟中的应用研究[J].国防科技大学学报,2016,38(5). |
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| 作者姓名： | 葛明明 曾明 赵小宇 |
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| 作者单位： | 1.国防科技大学 航天科学与工程学院,1.国防科技大学 航天科学与工程学院,1.国防科技大学 航天科学与工程学院 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 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。首次将显式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。进行了自由流速度5.0~5.7km/s的高焓风洞和高空条件下的圆柱非平衡流场数值模拟,得到了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。
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| 关 键 词： | 高精度格式 热化学非平衡流 数值模拟 |
| 收稿时间： | 4/1/2016 12:00:00 AM |
| 修稿时间： | 7/5/2016 12:00:00 AM |
Applications of High-Order Weighted Compact Nonlinear Scheme for Thermo-Chemical Nonequilibrium Flow |
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| Abstract: | High-order scheme has advantages in the simulations of complex flow, for its good behavior of preserving high spatial resolution with lower cost than the second order methods. Weighted Compact Nonlinear Scheme (WCNS-E-5) is applied in the simulations of thermo-chemical nonequilibrium flow around a cylinder with the freestream velocity of about 5~5.7km/s. Correct flowfield properties are acquired, the pressure and heat flux on the surface agree well with the experimental data. WCNS-E-5 also exhibits better performance on the grid convergence of heat flux than the second order MUSCL scheme. The results show that the present attempt to combine high order scheme with the calculations of stiff chemically reacting flow is basically successful, and has established a good foundation for the further study. |
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| Keywords: | high-order scheme thermo-chemical non-equilibrium flow numerical simulation |
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