Abstract
By deducting the HLLC(Harten,Lax,van Leer,Contact) fluxes of convective terms in the rotating coordinate system,a finite volume analysis code based on multi-block structured grids is developed independently,which aims at realizing the numerical solving of internal flow fields of turbo machineries.The flow simulations of a shrouded backswept impeller and an unshrouded radial impeller are carried out respectively.The calculated data such as surface pressure at various blade heights show favorable agreement with the data from commercial software,which verifies the accuracy of the algorithm.Then the characteristic analysis of tip clearance flow for the radial impeller is carried out.The results obtained indicate that,although the total leakage mass flow rises almost linearly as the impeller diffusion factor increases,the absolute value of leakage mass flow and the leakage loss decrease as the diffusion factor increases.Clearance leakage is driven by the loading near blade tip,and the leakage mechanism shows some similarity within a certain range of rotational speed.Under near choke operation point the generation spot of leakage vortex shifts more downstream,but attenuates faster.
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 callDisclaimer: 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.
