航空计算技术
航空計算技術
항공계산기술
AERONAUTICAL COMPUTER TECHNIQUE
2014年
4期
40-43
,共4页
LBM-LES%D2Q9模型%Smagorinsky 模型%多段翼型%无网格
LBM-LES%D2Q9模型%Smagorinsky 模型%多段翼型%無網格
LBM-LES%D2Q9모형%Smagorinsky 모형%다단익형%무망격
LBM-LES%D2 Q9 model%Smagorinsky model%multi-element airfoil%meshfree
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。
運用Lattice Boltzmann（LB）方法與Large Eddy Simulation（LES）結閤的方法數值模擬研究瞭二維翼型繞流流場，其中，粒子速度模型採用 D2Q9模型，鬆弛時間中對應的湍流粘性繫數由Smagorinsky模型計算，網格生成方法採用無網格技術。對NACA0012翼型進行數值模擬，驗證其有效性；為進一步研究其模擬複雜物體繞流的能力，以三段翼型30P30N為研究對象進行數值研究，計算齣瞭給定攻角條件下的氣動特性，併與實驗值進行比較。計算結果錶明，LBM-LES方法的計算結果能夠與實驗值一緻，是一種可行、有效且較新的數值模擬方法。
운용Lattice Boltzmann（LB）방법여Large Eddy Simulation（LES）결합적방법수치모의연구료이유익형요류류장，기중，입자속도모형채용 D2Q9모형，송이시간중대응적단류점성계수유Smagorinsky모형계산，망격생성방법채용무망격기술。대NACA0012익형진행수치모의，험증기유효성；위진일보연구기모의복잡물체요류적능력，이삼단익형30P30N위연구대상진행수치연구，계산출료급정공각조건하적기동특성，병여실험치진행비교。계산결과표명，LBM-LES방법적계산결과능구여실험치일치，시일충가행、유효차교신적수치모의방법。
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 .
