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.立体粒子图像测速技术（Stereo Particle Image Velocimetry，PIV）是一种标准测量方法（可参考https://link.springer.com/article/10.1007/s00348-005-0991-7），本数据集包含VT-400轴流涡轮（可参考https://doi.org/10.1051/epjconf/201611402143）内部的PIV测量数据。测量区域沿轴向×径向方向布置，位于静子与转子轮盘附近的轮毂区域，因此覆盖了静子尾迹以及轮毂附近的二次流结构。由于光学测量设备的限制，原始数据包含大量冗余背景区域，因此需要进行大量截断处理（可参考PSE 2022会议附带的演示文稿"duda-ES2022.pptx"）。核心数据存储于压缩包"ExportedVectorFields.zip"中，包含5个对应研究工况的文件夹，每个文件夹内均包含若干以CSV表格形式存储的快照数据。该数据为Dantec Dynamic Software的标准导出格式，可通过TecPlot软件打开（本研究采用自研代码完成数据读取、截断、滤波及平均特征计算）。数据集的整体概览可查看文件"Figures.svg"，需使用Inkscape软件打开以浏览所有图表。附带的两段视频分别展示了搭载激光对准系统的涡轮（拍摄期间未进行测量）以及向进气口喷入雾化雾气的造雾装置。