Vorticity dynamics analysis of flow field in Francis runner

In this research,moment expression of Francis runner is derived by vorticity dynamics,the diagnose method based on vorticity dynamics is also introduced.The numerical simulation using standard k-e turbulence model is applied to turbine flow passage with all blades(from inlet of wicket gate to outlet of draft).By computational results,BVF(boundary vorticity flux) and surface friction distributions on blades arre worked out,flow in Francis runner is estimated by vorticity dynamics method.Compared with the traditional analysis method and experimental data,practicability of vorticity dynamics is confirmed.