脉冲串模式的10kHz PLIF流场可视化技术研究  

Research on Flow Field Visualization Technology in Burst Mode10kHz PLIF

作　　者：韩明宏 于欣[1,2] 彭江波[1,2] 董昊[3] 曹振 袁勋 武国华 Han Minghong;Yu Xin;Peng Jiangbo;Dong Hao;Cao Zhen;Yuan Xun;Wu Guohua(National Key Laboratory of Laser Spatial Information,Harbin Institute of Technology,Harbin 150001,China;Institute of Opt-Electronics,Harbin Institute of Technology,Harbin 150001,China;College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]哈尔滨工业大学激光空间信息全国重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工业大学光电子技术研究所,黑龙江哈尔滨150001 [3]南京航空航天大学航空学院,江苏南京210016

出　　处：《气动研究与试验》2024年第6期57-63,共7页Aerodynamic Research & Experiment

基　　金：黑龙江省自然科学基金(LH2021F028)。

摘　　要：针对风洞超声速流场高动态可视化需求,研发了工程可用的移动式10kHz脉冲串模式的平面激光诱导荧光(PLIF)系统,单脉冲紫外激光能量可达5mJ,片光尺寸为10~20cm,流场空间分辨率可达百微米量级,可实现超声速流场结构的瞬态测量。应用此PLIF系统,在直流式小型低速风洞中开展了圆柱绕流流场结构可视化测量研究,选取丙酮分子作为示踪剂,研究了不同丙酮投放速度对流场结构的影响,获得了不同截面流场精细化结构的动态变化过程。试验结果表明,研发的高频PLIF系统为测量超声速风洞流场奠定了基础。In response to the demand for high dynamic visualization of the supersonic flow field in wind tunnels,a mobile 10kHz pulse train mode plane laser induced fluorescence(PLIF)system that can be used for engineering has been developed,the monopulse ultraviolet laser energy is 5mJ,and the optical size is 10~20cm.The field spatial resolution can reach the order of hundreds of microns,which can realize the transient measurement of the super-sonic flow field structure.Using this PLIF system,a visual measurement study of the flow field structure of the flow around a cylinder is carried out in a small direct current wind tunnel.Acetone molecule is selected as a tracer,the influence of different acetone injection speeds on the flow field structure is studied,and the dynamic change process of the fine structure of the tangential flow field is obtained.The experimental results show that the developed high-frequency PLIF system has laid the foundation for measuring supersonic wind tunned flow field.

关 键 词：流动可视化 高频PLIF 风洞测量 丙酮 

分 类 号：TN249[电子电信—物理电子学]