潮流能水轮机翼型升阻比与空化性能优化研究  

OPTIMIZATION OF LIFT-DRAG RATIO AND CAVITATION PERFORMANCE FOR MARINE CURRENT TURBINE

作　　者：孙召成 李增亮[1] 徐朝政 董祥伟[1] 张琦 冯龙 Sun Zhaocheng;Li Zengliang;Xu Chaozheng;Dong Xiangwei;Zhang Qi;Feng Long(College of Mechanical Electronic Engineering,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)机电工程学院

出　　处：《太阳能学报》2019年第12期3331-3338,共8页Acta Energiae Solaris Sinica

基　　金：工业和信息化部“高技术船舶科研”（2014020024）;中央高校基本科研业务费专项（10CX05009A）

摘　　要：以NACA63-018翼型为研究对象,分别采用贝塞尔曲线和NURBS曲线对翼型进行参数化构造,通过对比选用拟合精度更高的NURBS曲线。以水轮机空化系数σ′为优化目标,同时兼顾升阻比,采用多目标遗传算法和数值模拟手段进行多目标优化设计。对优化后的翼型与原始翼型在多攻角工况范围内进行水动力学特性分析,通过XFOIL验证优化后翼型升阻比性能;利用CFD软件对优化前后翼型空化流场进行瞬态模拟,对比两者空化性能。分析结果表明,优化后翼型相比较,原始翼型空化性能和升阻比均得到进一步提高。Taking the NACA63-018 airfoil as the research object,the paper uses the Bezier curve and NURBS curve to parameterize the airfoil and,after comparison,selects the NURBS curve with higher fitting precision.With the turbine cavitation coefficientσ′as one of the optimization goal,the multi-objective genetic algorithm and the numerical simulation method are used to conduct the multi-objective optimization design with the consideration of the lift-drag ratio.The hydrodynamic characteristics of the optimized airfoil and the original airfoil within the range of the multiple attack angles and working conditions are then analyzed so as to verify the lift-drag ratio performance of the optimized airfoil through XFOIL;the CFD software is also used to conduct the transient simulations of the cavitation flow fields of airfoils before and after the optimization so as to compare their cavitation performances.The results show that the cavitation performance and the lift-drag ratio of the optimized airfoil have been further improved compared with the original airfoil.

关 键 词：水轮机 曲线拟合 升阻比 空化系数 多目标遗传算法 

分 类 号：TK73[交通运输工程—轮机工程]