Wind on Vertiports (ERIES – WonV1)

1. Project overview This dataset presents the complete ERIES–WonV1 vertiport project conducted by DM-AirTech and the University of Genova and supported by the Engineering Research Infrastructures for European Synergies (ERIES) project, which has received funding from the European Union’s Horizon Europe Framework Programme under Grant Agreement No. 101058684. The dataset results from a comprehensive wind tunnel experiment campaign within a multiphase study investigating the wind field over vertiport configurations, focusing on the influence of the surrounding environment. The study covers both ground-level and rooftop vertiport layouts. 1.1. Ground-level vertiport The study on ground-level vertiports investigated the influence of an upstream barrier on flow disturbances over the vertiport, as well as potential mitigation strategies based on five configurations of the upstream barrier. A generic low-rise building, representing the upstream barrier, was modelled at a scale of 1:100 and positioned upstream of the vertiport under simulated atmospheric boundary layer (ABL) conditions corresponding to open country and sea terrain exposures. Five configurations of the upstream barrier were considered, differing in the mitigation measure applied to the low-rise building. For each configuration, the wind field above the vertiport was measured under both ABL profiles. Wind field measurements were conducted on a 3D grid of points above the vertiport surface using a Cobra probe for all five configurations of the upstream barrier and both inflow conditions. Additionally, Particle Image Velocimetry (PIV) measurements were recorded at four planar sections for Configuration 2, which had previously been identified, based on Cobra probe data, as the most effective in reducing flow disturbances. 1.2. Rooftop vertiport The study on rooftop vertiports investigated the influence of surrounding buildings and vertipad positioning on rooftop flow conditions in two phases. 1.2.1. Phase I The focus of Phase I of the Rooftop vertiport investigation was on the effect of surrounding buildings on the wind field above the rooftops of five selected buildings within a cluster of buildings in San Francisco. A 1:600 scaled model of the urban configuration was tested under a simulated urban ABL. Wind conditions above the rooftops of the five selected buildings were measured for eight wind directions ranging from 0 to 315 degrees, at an increment of 45 degrees. Wind field measurements were conducted using a Cobra probe at 10 elevations above the centers of the rooftops of the five selected buildings for each of the eight wind directions considered. 1.2.2. Phase II The focus of Phase II of the Rooftop vertiport investigation was on the effects of the vertipad positioning on the rooftop and the shielding influence of adjacent buildings. Out of the five buildings considered in Phase I, Building No.5 —identified as the most significantly affected by surrounding structures in terms of mean wind speed and turbulence intensity— was selected to be the focus of the investigation in Phase II. Scaled representations (1:300) of the upper 100 m of Building No. 5 and Building No. 4 were tested under a simulated urban ABL. Wind measurements were performed above the surface of the vertipad on the rooftop of Building No.5 under two conditions: (i) with shielding provided by the presence of Building No. 4 upstream, and (ii) in isolation without shielding. Five vertipad configurations on the rooftop of Building No. 5, differing in planar position relative to the rooftop geometry and in vertical elevation above the rooftop surface, were considered. Wind field measurements were obtained on a 3D grid of points above the surface of the vertiport using a Cobra probe for all five vertipad configurations under free and shielded conditions. In addition, PIV measurements were recorded at four planar sections for Configuration 2 under both shielded and free conditions. 2. Dataset description The dataset is organized into different folders and subfolders corresponding to the different test cases. It includes drawings, photos, and measurement data. 2.1. Drawings In the drawing subfolders of different test cases, the following drawings that are essential for the interpretation, reproduction, and reanalysis of the wind tunnel test data are provided: · 3D drawings of the tested scaled models for each test case in .dwg format · Layout of the tested models showing the orientation of the coordinate system axes · Geometry and orientation of the planar sections for PIV measurements with the coordinate system axes · The tested configurations with descriptions · Drawings identifying the selected buildings from the cluster in phase I of rooftop vertiport assessment · The three wind speed components (u, v, and w), corresponding to the longitudinal, lateral, and vertical directions, respectively, relative to the Cobra probe head 2.2. Photos In the photos folder, photos of the wind tunnel testing campaign for each of the test cases under different viewpoints are provided. 2.3. Measurement data Both the cobra probe and PIV measurement datasets, organized in different subfolders corresponding to each test case, are given in a readable ASCII (.dat) format. All wind speed measurements are expressed in m/s. 2.3.1. Cobra probe measurement data Each file name encodes the coordinates of the corresponding measurement point, defined relative to the center of the vertiport in millimeters. For example, a file named ‘x0033_y-033_z0099.dat’ is a measurement at an (x, y, z) coordinate of (33,-33,99) in millimeters. In each file, five columns of time history are provided for a 60-second wind measurement at a sampling frequency of 2 kHz. The first column corresponds to wind speed measured by a pitot tube located upstream, at a horizontal distance of 2m from the center of the vertiport and at a vertical distance of 180 mm from the top of the test section. The second column contains the temperature measurement inside the wind tunnel. The third, fourth, and fifth columns have the three wind speed components u, v, and w, respectively. 2.3.2. PIV measurement data The PIV measurement data contain measurements for both the ground-level and rooftop vertiport configurations. While the datasets share a consistent file structure, they differ in acquisition number and sampling frequency. For the ground-level vertiport configurations, there are two acquisitions for each view panel and were recorded at a sampling frequency of 360 fps. The rooftop vertiport configurations consist of a single acquisition for each view panel and were recorded at a sampling frequency of 300 fps. For all configurations, each acquisition folder contains a time series of 1,500 instantaneous ASCII (.dat) files. File names are sequentially numbered and encode both the snapshot index and the corresponding elapsed acquisition time in milliseconds. For example, in a file name ending with ‘001471-4086.1085’, the number 1471 denotes the snapshot index, while 4086.1085 indicates the elapsed acquisition time in milliseconds. Each .dat file is organized into four columns representing spatial coordinates (in millimeters) and velocity components. The specific coordinate planes and velocity definitions depend on the measurement section: for Section A, the first two columns provide the X and Z spatial coordinates, while the third and fourth columns contain the u (longitudinal) and w (vertical) velocity components. For Sections B, C, and D, the first two columns provide the X and Y spatial coordinates, while the third and fourth columns contain the u (longitudinal) and v (lateral) velocity components.