摘要
通过对涡轮多学科优化的分析,讨论了多学科优化中的气动设计技术.提出了基于叶栅特征参数和贝塞尔函数的二维叶栅参数化造型方法,并结合积叠轴的掠、弯形成三维复杂几何叶片成型技术.通过对气动优化过程中的数学模型分析,给出了一般要求的约束条件,并根据不同阶段的气动设计和约束条件提出了分阶段嵌套优化方法.针对三维气动计算,对商用软件CFX进行了二次开发,实现了三维计算的自动分网、建模、求解和后处理.最后,结合具体算例完成的优化设计结果表明,其涡轮效率提高了约2.3%,工作叶片数减少13.21%,叶片叶身总质量下降8.96%.
Aerodynamic design technology in multidisciplinary optimization was dis- cussed in this paper through the analysis of multidisciplinary design optimization （MDO） for turbine. Complex three-dimensional （3-D） blade profile generation technique was proposed by incorporating the swept stacking axis method and a two-dimensional cascade parametric modelling method based on cascade characteristic parameters and Bezier spline. General re- strictions were given through the analysis of the mathematic model used in aerodynamic opti- mization. And an optimization method was also proposed according to the aerodynamic de- sign and restrictions at different stages. For 3-D aerodynamic simulation, tgrid generation, modelling, solving and post processing can be completed automatically by further program- ming based on CFX. The optimization results show that an increase of 2.3 % in turbine effi- ciency has been reached, the number of rotating blades reduces by 13.21~ and the overall mass of blade decreases by 8.96%.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2012年第3期635-643,共9页
Journal of Aerospace Power
关键词
多学科优化
涡轮
气动设计
叶片造型
三维计算
multidisciplinary design optimization
turbine
aerodynamic design
blade profile generation
three-dimensional computational
