La Houille Blanche
Number 6, Octobre 1969
|Page(s)||635 - 644|
|Published online||23 March 2010|
Calibration d'une sonde à film chaud dans de l'eau en rotation
Ing., M.Sc.A. Doc. Ing. en hydraulique (Toulouse). Directeur du Département de Génie civil de la Faculté des Sciences Appliquées. Université de Sherbrooke, Sherbrooke (Qué), Canada.
2 Ing. ENSEIHT. Assistant de recherche au Département de Génie civil de la Faculté des Sciences Appliquées. Université de Sherbrooke, Sherbrooke (Qué), Canada.
3 Ing. E.I.M. Doc. Ing. en hydraulique (Toulouse). Professeur adjoint au Département de Génie civil de la Faculté des Sciences Appliquées. Université de Sherbrooke, Sherbrooke (Qué), Canada.
For our study of turbulence on moving sand beds behind a dam, we have chosen the system ,which seems to be the most accurate: the hot-wire and hot-film anemometry equipment. We use a DISA constant-temperature anemometer and quartz-coated hot-film probes : wedge-cylindrical and conical probes. The first problem we have to solve is a calibration problem : voltage vs velocity curves. In this paper, we study a new system of calibration. We have built a cylindrical tank turning around its vertical axis. We put some water in and after this water has been accelerated, all the system looks like a rotating solid. The velocity distribution is linear from the center (0) to the wall of the tank (V max). We have studied the drift due to the contamination of the water by dust, the velocity distribution in the water, and the influences of the free surface, the wall of the tank, the temperature... Unfortunately, it is difficult to vary the temperature of the water : we need a thermostatic closed space. This system of calibration seems to be very precise for low and high velocities.
© Société Hydrotechnique de France, 1969
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.