液体颗粒测量技术鞘流系统的设计与仿真  

Design and simulation of sheath flow system in liquid particle measurement

作　　者：王奋斗 佟首峰[1,2] 张鹏[1,2] 许丽 WANG Fendou;TONG Shoufeng;ZHANG Peng;XU Li(Institute of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,China;School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;Huayue School in Changchun Jingyue High Tech Industrial Development Zone,Changchun 130102,China)

机构地区：[1]长春理工大学空间光电技术研究所,吉林长春130022 [2]长春理工大学光电工程学院,吉林长春130022 [3]长春净月高新技术产业开发区华岳学校,吉林长春130102

出　　处：《应用光学》2024年第6期1132-1137,共6页Journal of Applied Optics

基　　金：吉林省自然科学基金(YDZJ202301ZYTS394);吉林省教育厅科学技术研究项目(JJKH20230814KJ);水声对抗技术重点实验室开放基金(6142214012021-03,CX-2022-032)。

摘　　要：液体颗粒测量技术是基于光散射法或光阻法,对液体中含有的颗粒物的粒径和数量等进行分析检测的技术。针对液体颗粒测量技术对测量精度的要求,基于流体动力聚焦原理,利用SolidWorks软件设计了用于液体中颗粒测量的鞘流系统模型。通过COMSOL的流体计算模块对该模型进行流体仿真计算,对聚焦流宽度的变化和系统对颗粒的聚焦性能进行仿真。仿真结果表明:该鞘流系统对样品流的聚焦性能与理论推导的一致,并且在样品流速度为0.1 m/s时,可将其聚焦到0.24 mm的宽度。并利用COMSOL颗粒追踪模块对该宽度下的颗粒轨迹进行仿真,实现了对颗粒的有效聚焦。在此基础上,对颗粒流经检测区时的状态进行分析,得出了重合误差的影响因素,对液体颗粒测量技术鞘流系统的实际设计具有一定的理论指导意义。Liquid particle measurement technology is based on light scattering method or photo resistance method to analyze and detect the particle size and quantity of the particles contained in the liquid.Aiming at requirements of the measurement accuracy of liquid particle measurement technology,based on the hydrodynamic focusing principle,the sheath flow system model for the measurement of particles in the liquid was designed by SolidWorks software.Through the fluid calculation module of COMSOL,the fluid simulation calculation of the model was carried out,and the change of the focusing flow width and the focusing performance of the system on the particles were simulated.The simulation results show that the focusing performance of the sheath flow system on the sample flow is consistent with the theoretical derivation,and it can be focused to 0.24 mm width when the sample flow speed is 0.1 m/s.Meanwhile,the COMSOL particle tracking module was used to simulate the particle trajectory at this width,and the effective focusing of particles was realized.On this basis,the state of particles flowing through the detection area was analyzed,and the influencing factors of coincidence errors were obtained,which had certain theoretical guiding significance for the practical design of the sheath flow system of liquid particle measurement technology.

关 键 词：颗粒测量 鞘流技术 重合误差 流体动力聚焦 

分 类 号：TN06[电子电信—物理电子学] TH724[机械工程—仪器科学与技术]