ERIES-Database for Validation of Urban Ventilation and Pollution Dispersion Models

This dataset aims to provide high-quality validation data on pollutant concentrations for studying air pollution dispersion in urban environments. The measurements were conducted for a central area of Sofia, Bulgaria, covering a region with a diameter of approximately 0.91 km. Experiments were performed at the closed-circuit atmospheric boundary layer wind tunnel (ABLWT) facility of Eindhoven University of Technology, using a geometric scale of 1:350, resulting in a blockage ratio of less than 5%. Pollutant concentrations were measured at 76 locations distributed throughout the target area for two different point source locations (S1 and S2), at a reduced-scale height of 5 mm. This resulted in two independent datasets representing dispersion from S1 and S2. Pure ethylene was used as a tracer gas, and the release was neutral, not accounting for any buoyancy effects. The tests were conducted for the prevailing wind direction of west-northwest i.e., at 293° with 0° corresponding to true north. The ABL generated represents the flow over rough terrain as per the VDI-3783 guideline. In addition, tests for Reynolds number independence, source strength sensitivity, and multiple repeatability tests were conducted to quantify experimental uncertainty.<br>In addition to the Metadata report, raw data time series of pollutant concentrations as well as appraoch flow conditions, and ambient conditions for the conducted measurements are provided here.

本数据集旨在为城市环境空气污染扩散研究提供高质量的污染物浓度验证数据。实验选取保加利亚索非亚市中心区域，覆盖直径约0.91km的范围。实验在埃因霍温理工大学（Eindhoven University of Technology）的封闭回路大气边界层风洞（atmospheric boundary layer wind tunnel, ABLWT）装置中开展，采用1:350的几何缩尺比，阻塞比小于5%。针对两个不同的点源位置（S1与S2），在目标区域内76个分布点位测量污染物浓度，缩尺高度为5mm，由此得到两组分别表征S1与S2扩散过程的独立数据集。实验采用纯乙烯作为示踪气体，释放过程为中性，未考虑任何浮力效应。实验采用盛行西西北方向，即方位角293°（0°对应正北方向）。所生成的大气边界层流场符合VDI-3783指南中关于粗糙地表流动的要求。此外，还开展了雷诺数独立性、源强敏感性以及多次重复性实验，以量化实验不确定性。

除元数据报告外，本数据集还提供了本次测量所得的污染物浓度原始时间序列、来流流场条件以及环境条件数据。