ERIES-Pollution, Atmospheric Boundary layer, Interaction and Ship Emission Data

The dispersion of pollutants exhausted from a generic service offshore vessel are investigated in the closed-circuit atmospheric boundary layer wind tunnel (ABLWT) at Eindhoven University of Technology. The vessel is replicated at a geometric scaling ratio of 1:100 and exposed to maritime neutral atmospheric flow conditions. For most measurements, an approach flow velocity of 10 m/s (full-scale) is set at the exhaust height.The majority of conducted measurements relate to 25% of maximum continuous rating (MCR) engine load, which results in a release velocity of Ue = 8.8 m/s (full-scale). Emissions are released from an exhaust with circular shaft of 0.76 m in diameter (De). To match the densimetric Froude number (Fr) in experiments, and reality, a velocity scaling ratio of 1:10 is chosen for the wind tunnel measurements.Main focus of pollutant concentration measurements is set on locations at 1.5 m height on the vessel’s deck to assess the possibility of workers’ exposure to emitted pollutants.Measurements are valid for the following conditions:• Standard atmospheric conditions (15 degrees Celsius and 1013.25 hPa), resulting in an ambient air density of ρa = 1.225 kg/m3.• Emission temperature of 350 degrees Celsius (corresponding to an emission density of 0.567 kg/m3)This results in a densymetric Froude number of Fr = 4.396069 (based on the diameter of the exhaust stack (De) and Ue = 8.8 m/s.<br>In addition to the Metadata report, raw data time series of pollutant concentrations as well as appraoch flow conditions are provided here.

本数据集针对埃因霍温理工大学（Eindhoven University of Technology）闭式循环大气边界层风洞（Atmospheric Boundary Layer Wind Tunnel，ABLWT）内，通用服务型远洋船舶排放污染物的扩散特性开展实验研究。实验按1:100的几何缩比比例复刻该船舶，并将其置于海洋中性大气流动工况中进行测试。多数测量工况下，排气口高度处的来流风速设定为实船尺度下的10 m/s。
本次实验的绝大多数测量工况均对应发动机最大持续功率（Maximum Continuous Rating，MCR）25%的负载，此时实船尺度下的排气排放流速为U_e=8.8 m/s。污染物通过直径D_e=0.76 m的圆形排气筒排出。为匹配实验与实际场景下的密度弗劳德数（densimetric Froude number，Fr），本次风洞实验选取了1:10的流速缩比比例。
污染物浓度测量的核心关注区域为船舶甲板上1.5 m高度处的测点，用于评估作业人员暴露于排放污染物的潜在风险。本实验的有效工况条件如下：
• 标准大气工况：环境温度15 ℃、大气压1013.25 hPa，对应环境空气密度ρ_a=1.225 kg/m³。
• 排气温度为350 ℃，对应排放气体密度为0.567 kg/m³。
基于排气筒直径D_e与排气流速U_e=8.8 m/s，可计算得到密度弗劳德数Fr=4.396069。
除元数据报告外，本数据集还附带了污染物浓度与来流工况的原始时间序列数据。