摘要
气动外形优化方法是提高翼型气动效率及缓解动态失速的重要手段,但此方法需要多次调用精确但耗时的计算流体力学(CFD)模拟,计算成本很高。提出了一种基于代理模型的优化方法替代CFD计算,从而开展翼型动态失速特性优化。通过高斯过程回归模型构建代理模型,采用加点准则的方式不断提高模型精度,利用归一化均方根误差对代理模型进行验证,并以S809翼型为研究对象,验证该优化框架的可行性。结果表明:与基准翼型相比,优化翼型的平均阻力系数和力矩系数分别降低了32.87%和23.74%,气动性能显著提高;气动外形的改变加速了吸力面近壁流动的速度恢复,减小了边界层厚度。
Aerodynamic shape optimization methods are important means to enhance the aerodynamic efficiency of airfoils and alleviate dynamic stall,but require repeatedly invoking precise yet time-consuming computational fluid dynamics(CFD)simulations,resulting in high computational costs.An optimization method based on surrogate model was proposed to replace CFD calculations,thereby conducting optimization of dynamic stall characteristics of airfoils.The surrogate model was constructed using the Gaussian process regression model,and the accuracy of the model was continuously improved by adopting the point addition criterion.The surrogate model was verified using the normalized root mean square error,and the feasibility of the optimization framework was verified using the S809 airfoil as the research object.Results show that compared with the baseline airfoil,the average drag coefficient and moment coefficient of the optimized airfoil are reduced by 32.87%and 23.74%,respectively,the aerodynamic performence was significantly improved.And the change in the aerodynamic shape accelerates the velocity recovery of the suction surface near the wall and reduces the boundary layer thickness.
作者
张强
常林森
李春
岳敏楠
张万福
ZHANG Qiang;CHANG Linsen;LI Chun;YUE Minnan;ZHANG Wanfu(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)
出处
《动力工程学报》
北大核心
2026年第1期67-76,共10页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(52376204,52006148,52106262)。
关键词
翼型
动态失速
气动外形优化
代理模型
数值模拟
airfoil
dynamic stall
aerodynamic shape optimization
surrogate model
numerical simulation
