摘要
为进一步挖掘涡轮性能潜力,实现气动优化参数化降维,减少优化耗时,基于全叶片贝塞尔曲面参数化方法、多岛遗传算法和CFD求解器构建了涡轮三维优化平台。通过建立涡轮叶片吸压力面展开曲面和贝塞尔曲面的参数化映射,全叶片贝塞尔曲面参数化方法实现了叶片吸力面和压力面的同时变形控制,减少了优化控制变量,具有型面光顺性和构造便捷性。对TTM跨音涡轮开展全局气动优化设计研究,结果表明:优化历时约70 h,涡轮设计点绝热效率提升0.48个百分点,流量增加0.97%,膨胀比下降0.32%,验证了曲面参数化优化方法对涡轮气动优化问题的有效性、工程实用性和降维特性。
In order to explore the further potential of turbine performance,realize parameterization and dimensionality reduction for aerodynamic optimization,and reduce optimization time,a three-dimensional optimization platform for turbine has been built based on the total-blade Bezier surface parameterization method,multi-island genetic algorithm and CFD solver.By setting up the parametric mapping of the Bezier surface and the surface that is generated by unfolding the suction and pressure surface of the turbine blade,the full-blade Bezier surface parameterization method realizes deformation control of the suction and pressure surface of the blade at the same time.The method reduces the number of control variable.It is simple to build up and ensure the smoothness of blade surface.The study of global aerodynamic optimization design for the TTM transonic turbine was carried out.The optimization process lasted about 70 hours and the results shows that the isentropic efficiency of the turbine at design point increased by 0.48 percentage points,the flow rate increased by 0.97%,and the expansion ratio decreased by 0.32%,which verified the effectiveness,engineering practicality and dimensionality reduction characteristics of the surface parametric optimization method for the turbine aerodynamic optimization problem.
作者
陈明升
陈江
成金鑫
向航
CHEN Mingsheng;CHEN Jiang;CHENG Jinxin;XIANG Hang(School of Energy and Power Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100083,China;School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2023年第3期641-653,共13页
Journal of Engineering Thermophysics
基金
“两机”国家科技重大专项基础研究(No.J2019-II-0005-0025)。
关键词
跨音涡轮
气动优化
全叶片曲面参数化
多岛遗传算法
贝塞尔曲面
transonic turbine
aerodynamic optimization
parameterization of total-blade surfaces
multi-island genetic algorithm
bezier surfaces
