ERIES-The aerodynamics of platooning and overtaking vehicles

A series of experiments was conducted in the closed-circuit Atmospheric Boundary Layer Wind Tunnel at Eindhoven University of Technology, featuring up to three Heavy Ground Vehicle (HGV) models at a reduced geometric scale of 1:20. The aim of this test was threefold. First, surface pressure and wind loads were investigated on an isolated HGV model for various crosswind conditions (yaw angles of 0° - no crosswind, 15°, 30° and 45°). Second, three HGV models were arranged in a platoon formation and the effect on surface pressures and wind loads of aforementioned crosswind conditions was studied on the platoon. Wake flow characteristics were assessed for the platoon at a yaw angle of 0°. Third, the three HGVs were also used to simulate an overtaking manoeuvre by iteratively moving the first and third model to mimic scenarios that are likely to occur while one HGV overtakes another. In total 44 configurations were assessed for the overtaking manoeuvre, for which surface pressure and wind loads were monitored.<br>In addition to the Metadata report, raw data time series of surface pressures, wake flow velicites, and resulting loads are provided here, as well as appraoch flow conditions, free-stream reference velocities and ambient conditions for the conducted measurements.

本研究在埃因霍温理工大学（Eindhoven University of Technology）的闭式循环大气边界层风洞（closed-circuit Atmospheric Boundary Layer Wind Tunnel）中开展了一系列实验，实验采用几何缩尺比为1:20的重型地面车辆（Heavy Ground Vehicle, HGV）模型，最多可同时布置三台该类模型。
本次实验的研究目标分为三项：其一，针对孤立的重型地面车辆模型，开展不同侧风工况下的表面压力与风荷载研究，测试涵盖的偏航角分别为0°（无侧风）、15°、30°及45°；其二，将三台重型地面车辆模型布置为列队阵型，研究上述侧风工况对队列整体表面压力与风荷载的影响，并针对偏航角为0°的队列工况分析其尾流流动特性；其三，利用三台重型地面车辆模型模拟超车工况：通过迭代调整第一台与第三台模型的位置，复现单台重型地面车辆超车过程中可能出现的各类场景。本次超车工况共设置44种试验构型，并同步监测其表面压力与风荷载数据。
除元数据报告外，本次实验还公开了表面压力、尾流流速以及相应荷载的原始时序数据，同时提供了本次测量的来流条件、自由流参考风速与环境参数等配套测量数据。