| Issue |
La Houille Blanche
Number 3-4, Juin 1998
|
|
|---|---|---|
| Page(s) | 55 - 60 | |
| DOI | https://doi.org/10.1051/lhb/1998038 | |
| Published online | 01 August 2009 | |
Analyse expérimentale de l'interaction roue-distributeur dans une pompe-turbine
Experimental analysis of the interaction runner-distributor area in a turbine-pump
1
Laboratoire des Ecoulements Géophysiques et Industriels, Institut National Polytechnique de Grenoble
2
Laboratoire de Machines Hydrauliques de l'Institut de Machines Hydrauliques et de Mécanique des Fluides, Ecole Polytechnique Fédérale de Lausanne
3
Direction des Recherches et Etudes Département Machines, Electricité de France
4
Hydro-Vevey SA, Groupe VOEST ALPINE
Abstract
The conception and the optimization of turbines - pumps use systematically the analysis possibilities offered by the numerical simulation of the internal flow. The practice demonstrates the importance of the couplings between different parts of the machine. Several numerical techniques are now proposed to shape these areas.
The validation of these methods, possible only starting from detailed experiences, has become essential, notably to define the area of the calculation validity.
A such detailed experimental analysis of the flow in the runner - distributor area was realized in the pump mode on a reduced model by specific speed nq=66, of the Hydro - Vevey company. Unsteady measurements, obtained by P.I.V. (Particle Image Velocimetry) and by L.D.V. (Laser Doppler Velocimetry) and by probes of stationary total pressure are discussed. The stationary velocity distribution to the exit of the runner and between stay vanes, as well as the unsteady propagation of the runner wake is shown.
© Société Hydrotechnique de France, 1998