液力偶合器漩涡流场PIV试验测量影响因素分析  

Analysis of Influencing Factors of PIV Experimental Measurement for Vortex Flow Field in Hydrodynamic Coupling

作　　者：柴博森[1] 项玥[2] 马文星[1] 王志豪 魏亚宵 李振男 CHAI Bo-sen;XIANG Yue;MA Wen-xing;WANG Zhi-hao;WEI Ya-xiao;LI Zhen-nan(School of Mechanical Science and Engineering,Jilin University,Changchun 130022,Jilin,China;Jilin Province Product Quality Supervision and Inspection Institute,Changchun 130103,Jilin,China)

机构地区：[1]吉林大学机械科学与工程学院,吉林长春130022 [2]吉林省产品质量监督检验院,吉林长春130103

出　　处：《华南理工大学学报（自然科学版）》2017年第12期92-98,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51405184);吉林省科技发展计划项目(20160520070JH);吉林大学国防预研基金资助项目(419140100076)~~

摘　　要：为了实现液力偶合器漩涡流场高精度试验测量,研究粒子图像测速(PIV)流场试验测量环节的主要误差来源,分析示踪粒子选择、图像采集策略和流速提取算法对流场测量精度的影响,提出降减和消除误差的途径与方法.研究结果表明:在容积为2 710 m L的水介质液力偶合器中投入1.0 g等效直径为1.5μm的PSP示踪粒子,图像采集效果好且粒子浓度满足PIV测速要求;将液力偶合器外壁表面设计为大平面采集区域能够有效地避免反光现象,并降低离轴角误差和光路折射误差;采用递归互相关算法,使用自适应查询区域分析方法,通过3次迭代计算,能够更好地提取主流区域上大尺度漩涡流动特征和局部角隅区域上小尺度涡旋结构特征.In order to achieve a high-precision experimental measurement of the vortex flow coupling,main error sources of the internal flow experimental measurement by particle image velocimetry(PIV)technology are investigated,and the influence of the tracer particle selection,the image acquisition strategy and the flow velocity extraction algorithm on the measurement precision of the internal flow field is analyzed.Then,some methods are proposed to reduce and eliminate the errors.The results show that(1)when 1.0 g PSP tracer particles of an equivalent diameter of 1.5[xm are put into a 2710mL water-medium hydrodynamic coupling,the collected flow images are better and the particle concentration can meet the requirements of the;(2)designing the outer surface of the hydrodynamic coupling as a large plane collection area can effectively avoid the reflective phenomenon and reduce the off-axis angle error and the optical refractive the recursive cross-correlation algorithm and the adaptive interrogation window analysis method to carry out three iterations,the characteristics of both the large-scale vortex flow in a mainstream vortex structureon local comers can be extracted moreeffectively.The conclusions will provide a vital reference for the accurate measurement of the vortex flow field in the hydrodynamic coupling.

关 键 词：液力偶合器 璇涡 示踪粒子 光路折射 递归互相关算法 

分 类 号：TH137.33[机械工程—机械制造及自动化]