V型结构对NACA0012型水泵叶片阻力的影响  

Effect of V-shaped Structure on Resistance of NACA0012 Pump Blades

作　　者：王珺 牟晓蕾[1] 解涛 许娜[3] WANG Jun;MOU Xiao-lei;XIE Tao;XU Nan(School of Civil Engineering,Yantai University,Yantai 264005,China;Yantai Engineering Construction Supervision Co.,Ltd,Yantai 264001,China;School of Mechanical and Electrical Engineering,Yantai University,Yantai 264005,China)

机构地区：[1]烟台大学土木工程学院,山东烟台264005 [2]烟台市工程建设第一监理有限公司,山东烟台264001 [3]烟台大学机电汽车工程学院,山东烟台264005

出　　处：《烟台大学学报（自然科学与工程版）》2020年第1期20-26,共7页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：国家自然科学基金资助项目(11502228,11802262);烟台大学研究生科技创新基金资助项目(YDYB1920)

摘　　要：利用计算流体力学方法分别对水泵叶片全翼面和前、中、后3个不同位置处加装6种不同粗糙度的V型结构进行了数值模拟.研究发现,在Re=3×105时,不同位置处的V型结构对翼型阻力影响存在明显的差别.当小尺寸的V型结构布置于翼型后段时能够有效地减小翼型的阻力.这是由于在翼型后段易于发生流动分离的现象,而此部分的微小V型结构可以有效地增加壁面处的黏性底层厚度,减小了这一部分流体的湍动能.同时V型结构之间形成的二次涡使得来流方向与涡转动的方向相同,有效地减少了壁面的摩擦阻力.Numerical simulation is performed of the V-shaped structure with six different roughnesses at three different positions of the pump blade(the front,middle and rear of the pump blade)by computational fluid dynamics(CFD).The results show that,when Re=3×105,there is a significant difference in the influence of the V-shaped structure at different positions on the airfoil resistance.The drag of the airfoil can be effectively reduced when the small-sized V-shaped structure is arranged in the rear section of the airfoil.This is due to the tendency of flow separation in the rear section of the airfoil,and the minute V-shaped structure of this part can effectively increase the thickness of the adhesive bottom layer at the wall surface and reduce the turbulent energy of this part of the fluid.Meanwhile,the secondary vortex formed between the V-shaped structures makes the direction of the incoming flow the same as the direction of the vortex rotation,effectively reducing the frictional resistance of the wall surface.

关 键 词：计算流体力学 非光滑表面 减阻 优化 

分 类 号：O352[理学—流体力学]