Modane Giant Grid Hot-Wire Measurements

This dataset contains files with hot-wire (CTA) measurements carried in the giant grid turbulence experiment in 2014 in the S1MA wind tunnel of ONERA (Modane) in the context of ESWIRP european project. This experiment aims at a detailed investigation of the statistical properties of turbulent flows at large Reynolds numbers. The primary goal is to take advantage of the unequaled large-scale dimensions of the ONERA S1MA wind-tunnel facility, to make available to the broad turbulence community high-quality experimental turbulence data with unprecendented resolution (both spatial and temporal) and accuracy (in terms of statistical convergence). With this goal, we designed the largest grid-generated turbulence experiment planned and performed to date. Grid turbulence is a canonical flow known to produce almost perfectly homogeneous and isotropic turbulence (HIT) which remains a unique framework to investigate fundamental physics of turbulent flows. The dataset is composed of pre-calibrated longitudinal (1D) velocity signals (stored in matlab files) from 6 hot wires at various Reynolds numbers and various distances from the grid. Measurements were taken for 6 distances from the grid : 14.05m, 7.9m, 10.9m, 17.3m, 20.48m, 23.16m and 4 different wind velocities (i.e. 4 different Reynolds numbers) : 20m/s, 25m/s, 35m/s, 45 m/s (corresponding to Reynolds numbers based on Taylor microscope ranging from 290 to 500. Details of acquisition parameters and explored physical parameters are available in the README file. Have Fun!!

本数据集包含2014年在法国国家航空航天研究院（ONERA）莫达讷分中心的S1MA风洞中，于ESWIRP欧洲项目框架下开展的巨型网格湍流实验的热线（CTA）测量文件。本实验旨在对高雷诺数湍流的统计特性开展精细化研究。本研究的核心目标是依托ONERA S1MA风洞设施无与伦比的超大尺度特性，为全球湍流研究共同体提供兼具前所未有的空间、时间分辨率与统计收敛精度的高质量实验湍流数据。基于这一目标，我们设计并实施了迄今为止规模最大的网格生成湍流实验。网格湍流是一种典型流动，可产生近乎完美的均匀各向同性湍流（Homogeneous and Isotropic Turbulence, HIT），仍是研究湍流基础物理机制的独特实验框架。本数据集包含6根热线风速仪在不同雷诺数、不同网格距离下采集的预校准纵向（一维）速度信号，存储为MATLAB格式文件。实验共设置6个网格距离测点：14.05m、7.9m、10.9m、17.3m、20.48m、23.16m，以及4种来流风速（对应4种雷诺数）：20m/s、25m/s、35m/s、45m/s，对应的基于泰勒微尺度的雷诺数范围为290至500。采集参数与研究所涉及的物理参数细节可参见README文件。祝使用愉快！

搜集汇总

背景与挑战

背景概述

该数据集是2014年在ONERA S1MA风洞中进行的巨型网格湍流实验的热线测量数据，旨在提供高分辨率、高精度的湍流数据，用于研究高雷诺数下的湍流统计特性。数据集包含6个热线在不同距离和4种风速下的预校准速度信号，存储为MATLAB文件，覆盖泰勒微尺度雷诺数范围290至500，是网格生成均匀各向同性湍流研究的重要资源。