摘要
为实现液力变矩器叶栅系统的完全三维设计及其优化,开发了一套包含束流初值搜索、循环圆与叶形的参数化设计、网格划分、流场分析、试验设计和优化算法在内的三维优化设计系统,并且为各环节开发了相应设计工具。快速的束流初值遗传算法搜索为三维多目标优化提供合理初值;循环圆设计工具可以快速灵活地给出平面分布和几何约束,而后叶形设计分别为泵轮、涡轮和导轮叶片指定叶片角度和加厚形式,空间三维叶片设计整合前面设计结果生成叶片空间姿态,同时在整个叶片成型过程中完全采用参数驱动的形式;为对各个参数对传动性能的影响有准确反映,对设计结果进行了自动的网格划分和数值分析,并将分析结果反馈给优化设计环节以及后续相关部件的有限元分析环节;优化设计采用试验设计与全局优化算法相结合以提高设计的稳健性,加速收敛。通过对D400型液力变矩器的三维优化,得到了一组新的优化叶片,传动特性得到提高、同时减少了设计用时和优化迭代次数,表明叶栅的三维优化设计系统是开发新型性能优良液力变矩器的更为有效和准确的工具。
A three-dimensional optimization design system of torque converter cascade is developed, including meanline initial value searching, torus and vanes parameterization, grid generation, CFD analysis, design of experiment and optimization algorithm, and for each segment a corresponding design tool is presented. Fast meanline initial value searching supplies reasonable initial value for three-dimensional design system; torus design tool provides feasible geometry layout, blade design tool sets angles, profiles and space attitude of pump, turbine and stator vanes, all the process of blade generation is driven by parameters. To explore the influence of each group parameters, mesh and CFD analysis are applied to the blade model, and then calculated results are send to optimization platform. Design of experiment and global optimization algorithm are integrated in the system to enhance optimization robustness and accelerate convergence. After D400 torque converter is investigated by three-dimensional optimization, a new set vanes are gotten by this system, transmission characteristic is improved and design cost is reduced, the result shows that three-dimensional optimization design system is an effective and accurate tool to develop new type high-class torque converter.
出处
《流体传动与控制》
2006年第4期41-44,48,共5页
Fluid Power Transmission & Control
