Department of Building Physics, Bauhaus-Universität Weimar, Weimar, Germany.
Pennsylvania State University, University Park, PA, USA.
Indoor Air. 2020 Jul;30(4):757-766. doi: 10.1111/ina.12674. Epub 2020 Apr 29.
A new large-field, high-sensitivity, single-mirror coincident schlieren optical instrument has been installed at the Bauhaus-Universität Weimar for the purpose of indoor air research. Its performance is assessed by the non-intrusive measurement of the thermal plume of a heated manikin. The schlieren system produces excellent qualitative images of the manikin's thermal plume and also quantitative data, especially schlieren velocimetry of the plume's velocity field that is derived from the digital cross-correlation analysis of a large time sequence of schlieren images. The quantitative results are compared with thermistor and hot-wire anemometer data obtained at discrete points in the plume. Good agreement is obtained, once the differences between path-averaged schlieren data and planar anemometry data are reconciled.
魏玛包豪斯大学安装了一种新的大视场、高灵敏度、单镜共焦纹影光学仪器，用于室内空气研究。它的性能通过对加热人体模型的热羽流进行非侵入式测量来评估。纹影系统产生了人体模型热羽流的极好的定性图像，也提供了定量数据，特别是通过对大量纹影图像的数字互相关分析得出的羽流速度场的纹影速度测量。定量结果与在羽流中离散点获得的热敏电阻和热线风速计数据进行了比较。一旦调和了路径平均纹影数据和平面风速计数据之间的差异，就可以得到很好的一致性。
