摘要
研究和发展了一种跨声速自然层流(natural laminar flow,NLF)翼型优化设计方法。建立了翼型几何外形的CST参数化方法,并以部件形函数系数为优化设计变量,结合可行性方向法以及多岛遗传算法,对跨声速翼型进行升阻比和层流覆盖面积最大化的优化设计,优化设计过程中,为准确预测层流-湍流转捩和翼型绕流特性,采用了基于k-ωSST+γ-Reθt四方程模型的计算流体力学(computation fluid dynamics,CFD)数值模拟技术。结果表明,采用该优化方法能够较为有效的优化出满足设计状态和非设计状态的层流翼型。
A optimization design method for transonic natural laminar flow airfoil is proposed firstly. In this method, a CST parametric method is developed to parameterize the airfoil geometry and the coefficients of the part shape function utilized as design variables. The aerodynamics of the airfoils is calculated by high-fidelity CFD computation based on the k-ω SST ＋ y-Re θt four equations turbulence model, Modified Method of Feasible Directions （MMFD） and Multi-Island Genetic Algorithm are employed in the airfoil optimization design. Results show that the optimization method can be used to optimize the laminar airfoil effectively and it meet its requirements of the on-design and off-design.
出处
《机械制造与自动化》
2015年第6期167-169,211,共4页
Machine Building & Automation
