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.

中文翻译：

---

定性和定量schlieren光学测量人的热羽。

包豪斯大学魏玛大学已安装了一种新的大视野，高灵敏度，单镜重合的谢利伦光学仪器，用于室内空气研究。其性能通过加热人体模型的热羽的非侵入式测量来评估。schlieren系统可生成人体模型热羽流的出色定性图像以及定量数据，尤其是羽流速度场的schlieren测速法，其源自对较大时间序列的schlieren图像进行数字互相关分析。将定量结果与在烟羽中离散点处获得的热敏电阻和热线风速计数据进行比较。一旦协调了路径平均的Schlieren数据和平面风速数据之间的差异，就可以取得良好的一致性。