High speed centrifugalcompressors are widely usedinindustry.Itisimportantto understanditsinternal flow fieldin orderto design higher efficiency and pressure ratio impellers.In this paper,a 3 Dviscous code to solve ...High speed centrifugalcompressors are widely usedinindustry.Itisimportantto understanditsinternal flow fieldin orderto design higher efficiency and pressure ratio impellers.In this paper,a 3 Dviscous code to solve the simplified Reynolds averaged Navier Stokes equations has been developed. The viscous effect is simulated by viscous bodyforce method.The governing equations are spatially discretizedinthe cell vortex finite volume scheme on a simple Hmesh.Theturbulence closureis made usingthe Baldwin Lomax model.This codeis demonstratedfor predictingtheinternalflow field of a high speed impeller.Some laser measured results are also illustratedfor comparing with calculated data.展开更多
This paper presentsthe concept ofafull function numerical methodforflow overa self excited vibrating body.It contains three dimensional (3 D) numerical analysis of unsteady aerodynamic force for a self excited ...This paper presentsthe concept ofafull function numerical methodforflow overa self excited vibrating body.It contains three dimensional (3 D) numerical analysis of unsteady aerodynamic force for a self excited vibrating body, calculation ofthe work done by unsteady aerodynamic force and damping, determination of the equilibrium amplitude and dynamic stress as wellas correspondinglife evaluation.展开更多
文摘High speed centrifugalcompressors are widely usedinindustry.Itisimportantto understanditsinternal flow fieldin orderto design higher efficiency and pressure ratio impellers.In this paper,a 3 Dviscous code to solve the simplified Reynolds averaged Navier Stokes equations has been developed. The viscous effect is simulated by viscous bodyforce method.The governing equations are spatially discretizedinthe cell vortex finite volume scheme on a simple Hmesh.Theturbulence closureis made usingthe Baldwin Lomax model.This codeis demonstratedfor predictingtheinternalflow field of a high speed impeller.Some laser measured results are also illustratedfor comparing with calculated data.
文摘This paper presentsthe concept ofafull function numerical methodforflow overa self excited vibrating body.It contains three dimensional (3 D) numerical analysis of unsteady aerodynamic force for a self excited vibrating body, calculation ofthe work done by unsteady aerodynamic force and damping, determination of the equilibrium amplitude and dynamic stress as wellas correspondinglife evaluation.
