Abstract
The unsteady Reynolds-averaged Navier-Stokes equations with the k-ω based SST turbulence model were solved to model the unsteady flow within the entire flow passage of a large Francis Pump turbine with misaligned guide vanes (MGV) device under the rotated speed. Four MGV with three different MGV openings are chosen to analyse the influence of pressure pulse in turbine modes. This study investigates the characteristics of the dominant unsteady flow frequencies in different parts of the pump turbine for various MGV openings. The hydraulic performance and pressure fluctuations were predicted numerically. The computed result shows that the MGV can decrease the relative amplitude in the state part of flow passage, but not for the rotator runner blades.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
