000260437 001__ 260437
000260437 005__ 20190619220053.0
000260437 037__ $$aCONF
000260437 245__ $$aUse of compact Laser Doppler Velocimetry in reduced scale model testing of hydraulic machines
000260437 260__ $$c2018
000260437 269__ $$a2018
000260437 300__ $$a9
000260437 336__ $$aConference Papers
000260437 520__ $$aLaser based flow survey methods such as Laser Doppler Velocimetry (LDV) or Particle Image Velocimetry (PIV) have long been used for studying the flow in hydraulic machines. Even if the results have crucially improved our understanding of potentially destabilizing flow patterns in the draft tube at off-design conditions and the prediction of the stable operating range, these techniques are not systematically used for reduced scale model measurements in the frame of customer acceptance tests or development projects. In a not too distant past, the price, size and complexity of the necessary equipment and procedures exceeded the acceptable range for these projects. Recent developments however made them more accessible. Furthermore, the collaboration with experienced research institutes provides the necessary know-how as well as an added academic value by providing researchers with realistic test cases. This work reports a case study for which a compact LDV probe was used to measure the velocity field in the draft tube cone of a reduced scale physical model of a Francis turbine. The axial and tangential velocity profiles were established by performing measurements at several radial positions between the turbine centreline and the cone wall. The overall objective was the validation of numerical flow simulations across the entire operating range of the turbine, from partial to full load.
000260437 700__ $$aSakamoto, Masashi
000260437 700__ $$g154802$$aMüller, Andres$$0244116
000260437 700__ $$g185034$$aBerruex, Vincent$$0253995
000260437 700__ $$g243348$$aAndolfatto, Loïc$$0247940
000260437 700__ $$0241012$$aAvellan, François$$g104417
000260437 700__ $$aYamaishi, Kazuhiko
000260437 7112_ $$aHydro 2018$$cGdansk, Poland$$dOctober 15-17, 2018
000260437 8560_ $$floic.andolfatto@epfl.ch
000260437 8564_ $$uhttps://infoscience.epfl.ch/record/260437/files/260437.pdf$$s1779242
000260437 909C0 $$xU10309$$pLMH$$mfrancois.avellan@epfl.ch$$0252135
000260437 909CO $$qGLOBAL_SET$$pconf$$pSTI$$ooai:infoscience.epfl.ch:260437
000260437 960__ $$aloic.andolfatto@epfl.ch
000260437 961__ $$apierre.devaud@epfl.ch
000260437 973__ $$rREVIEWED$$aEPFL
000260437 980__ $$aCONF
000260437 981__ $$aoverwrite