【摘要】：高精度格式因其在較低的計算資源消耗下仍能保持足夠的精度而在精細流動結構的模擬中具有獨特優(yōu)勢。將顯式5階加權緊致非線性格式(WCNS-E-5)引入二維高溫非平衡流計算,進行自由流速度5.0~5.7 km/s的高焓風洞和高空條件下的圓柱非平衡流場數(shù)值模擬,得到正確的流場參數(shù)分布、壁面壓力和壁面熱流等結果與實驗值吻合較好。計算結果表明,WCNS-E-5格式較2階的MUSCL格式具有更好的熱流網格收斂特性。分析并針對算例條件初步解決了高階格式在剛性化學反應流模擬中的魯棒性問題,為進一步采用高階格式開展流場結構更加復雜的熱化學非平衡流數(shù)值研究奠定了良好基礎。
[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.
【作者單位】： 國防科技大學航天科學與工程學院;
【基金】：國家自然科學基金資助項目(11572348) 國防科技大學重大應用基礎研究資助項目(ZDYYJCYJ20140101)
【分類號】：V211.3

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