PIV data near hub of VT-400 axial turbine

Stereo Particle Image Velocimetry (PIV a standard method see e.g. https://link.springer.com/article/10.1007/s00348-005-0991-7) measurement inside an axial turbine VT-400 (see e.g. https://doi.org/10.1051/epjconf/201611402143). The measured area is oriented in axial × radial direction near the hub between the stator and rotor wheel. Therefore it covers the wake past stator wheel and secondary structures near the hub. Due to limited optical instrumentation, the data cover lot of surroundings, therefore a massive cut-off is needed (see the attached presentation "duda-ES2022.pptx" from conference PSE 2022). The main data are organized in the zip file "ExportedVectorFields.zip": there are 5 folders for studied regimes. Each contain several snapshots in form of csv table. It is a standard export from Dantec Dynamic Software, therefore it should be openable in TecPlot (But I have used my own codes to open, cut, filter and to calculate the mean characteristics). The overview can be found in the file "Figures.svg"; use Inkscape to open it and look around for all figures. Two attached movies show the opened turbine with laser alignment (no measuring during the movie) and a fog generator fogging into the inlet.立体粒子图像测速（Stereo Particle Image Velocimetry, SPIV，作为粒子图像测速（Particle Image Velocimetry, PIV）的标准实现方案，相关标准方法可参见文献https://link.springer.com/article/10.1007/s00348-005-0991-7），针对VT-400型轴向涡轮内部开展的流场测量实验，实验细节可参照文献https://doi.org/10.1051/epjconf/201611402143。测量区域沿轴向×径向方向布置，位于轮毂附近的静叶与动叶轮之间，覆盖了静叶尾迹以及轮毂附近的二次流结构。由于光学测量仪器的配置限制，原始采集数据包含大量冗余背景区域，因此需要进行大规模的截断预处理，具体处理细节可参见2022年PSE会议附件演示文稿"duda-ES2022.pptx"。核心数据集打包于压缩文件"ExportedVectorFields.zip"中，内含5个对应不同研究工况的子文件夹，每个文件夹内存储有若干以CSV表格格式保存的流场快照。该数据为丹迪科动态软件（Dantec Dynamic Software）的标准导出格式，可通过TecPlot软件打开（本研究中作者采用自研代码完成数据读取、截断、滤波以及平均流场特性的计算工作）。数据集的整体概览可通过文件"Figures.svg"查看，建议使用Inkscape软件打开以浏览全部配图。附件包含两段演示视频：其一为搭载激光对准系统的涡轮整机（视频录制期间未开展测量工作），其二为向涡轮入口喷射雾化流体的雾发生装置运行场景。