Publikationsdatum:
2018-07-31
Beschreibung:
The accurate prediction of flow patterns is essential during the optimization design of a pump-turbine. To determine the flow patterns and validate the flow simulation inside a pump-turbine, Laser Doppler Velocimetry (LDV) measurements and 3D flow simulation in the draft tube cone of a high-head pump-turbine model have been performed at normal operating conditions in turbine and pump modes. Velocity distributions were measured for operating conditions covering the speed factor n ED =0.21 and 0.19 at turbine mode for loads ranging from 40% to 100% the rated power as well as best efficiency point. Measurements of unsteady flows inside the draft tube cone were conducted at a high precision hydraulic model test rig with LDV system from TSI Co. The 3D flows through the pump-turbine model were numerically simulated with ANSYS/CFX ® software at all the measured operating points. Both measured and simulated velocity profiles are presented and analyzed to show ...
Print ISSN:
1755-1307
Digitale ISSN:
1755-1315
Thema:
Geographie
,
Geologie und Paläontologie
,
Physik
