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利用激光粒子图像速度场测试技术对阀体后90°圆截面弯管的内部流场进行测量,分别在不同阀体开度和流速工况下,获取了弯管内大量高分辨率瞬态速度场数据,并对其进行统计分析,以获取相关流场特征,包括时均速度场、流线图谱及涡量场等.结果表明:阀体后弯管流场存在明显的高速区和低速区,并在特定工况下产生涡流;流场特性随着阀门开度、流速以及截面位置的不同而产生较大的变化.
The internal flow field of the elbow with 90 ° circular cross section after the valve body was measured by the laser particle image velocity field test technique. A large number of high-resolution transient velocities in the elbow were obtained under different valve opening and flow rate conditions Field data and statistical analysis to obtain relevant flow field characteristics, including the time-average velocity field, streamline map and vorticity field.The results show that there are obvious high-speed and low-speed areas , And produce eddy under certain operating conditions; flow characteristics with the valve opening, flow rate and cross-sectional position of the larger changes have taken place.