| 基于LBM-LES方法的多段翼型流场数值模拟 |
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| 引用本文： | 石岩,司海青,王兵.基于LBM-LES方法的多段翼型流场数值模拟[J].航空计算技术,2014(4):40-43. |
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| 作者姓名： | 石岩 司海青 王兵 |
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| 作者单位： | 南京航空航天大学民航飞行学院,江苏南京210016 |
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| 基金项目： | 国家自然科学基金项目资助（11272151） |
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| 摘 要： | 运用Lattice Boltzmann(LB)方法与Large Eddy Simulation(LES)结合的方法数值模拟研究了二维翼型绕流流场,其中,粒子速度模型采用D2Q9模型,松弛时间中对应的湍流粘性系数由Smagorinsky模型计算,网格生成方法采用无网格技术。对NACA0012翼型进行数值模拟,验证其有效性;为进一步研究其模拟复杂物体绕流的能力,以三段翼型30P30N为研究对象进行数值研究,计算出了给定攻角条件下的气动特性,并与实验值进行比较。计算结果表明,LBM-LES方法的计算结果能够与实验值一致,是一种可行、有效且较新的数值模拟方法。
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| 关 键 词： | LBM-LES DQ模型 Smagorinsky模型 多段翼型 无网格 |
Numerical Simulation of Multi-element Airfoil Based on LBM -LES |
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| Institution: | SHI Yan, SI Hai-qing, WAMG Bing (College of Civil Aviation and Flight ,Nanjing University of Aeronautics and Astronautics, Nanfing 210016, China) |
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| Abstract: | Based on the meshfree technology ,coupled method between LBM and LES is developed in the paper,where D2Q9 model is used as particle velocity model and turbulent viscosity coefficient in the re-laxation time is calculated using Smagorinsky model , then flow around the airfoil is simulated using the method.To validate the LBM-LES method,flow field of NACA0012 airfoil is firstly calculated using the coupled method;Then,flow around multi-element airfoil 30 P30 N is studied to further show the ability of LBM/LES for simulating complex bodies ,where aerodynamic characteristics are calculated under the dif-ferent given angle of attack and comparisons with experimental results are also made in the paper .Results demonstrate that good agreements are obtained between values from LBM /LES method and experiment , therefore,the coupled method based on the meshfree technology is effective and feasible . |
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| Keywords: | LBM- LES D2Q9 model Smagorinsky model multi- element airfoil meshfree |
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