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!!