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Keywords: viscosity
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Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031016.
Published Online: November 18, 2010
... kinetic energy , which allows the increase in the nonturbulent fluctuations in the pretransitional and transitional region to be taken into account. The model is derived from that of Lardeau et al. (2004, “Modelling Bypass Transition With Low-Reynolds-Number Non-Linear Eddy-Viscosity Closure,” Flow...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2009, 131(3): 031006.
Published Online: April 8, 2009
... of stator-related effects at the rotor exit is encountered when the stator incidence is increased as a result of the different mixing rate within the cascade gap. 18 07 2007 04 04 2008 08 04 2009 aerodynamics blades viscosity The flow downstream of a subsonic turbine cascade...
Journal Articles
Article Type: Technical Papers
J. Turbomach. April 2005, 127(2): 395–401.
Published Online: May 5, 2005
... to the local flow conditions, uses the most suitable fluctuation splitting (FS) scheme at each cell of the computational domain. The viscous terms are discretized using a standard Galerkin finite element scheme. The eddy viscosity is evaluated by means of the Spalart-Allmaras turbulence transport equation...
Journal Articles
Article Type: Technical Papers
J. Turbomach. April 2005, 127(2): 363–371.
Published Online: May 5, 2005
... for incompressible turbulent flow the continuity equation and the three-dimensional time-averaged Navier-Stokes equations. In this study, the eddy-viscosity assumption is used to model the Reynolds stresses. The eddy viscosity is determined by means of the Standard...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2005, 127(1): 43–51.
Published Online: February 9, 2005
... measurement viscosity compressors aerodynamics supersonic flow computational fluid dynamics turbulent diffusion The work reported here constitutes one element of a program being conducted by the MIT Gas Turbine Laboratory and its collaborators to develop and validate the technology for design...
Journal Articles
Article Type: Technical Papers
J. Turbomach. October 2006, 128(4): 606–615.
Published Online: February 1, 2005
... 10 2004 01 02 2005 rotors micromechanical devices machine bearings turbomachinery hydrostatics orifices (mechanical) Green's function methods compressible flow viscosity In a previous paper by Teo and Spakovszky ( 1 ), the authors presented an analytical model...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2005, 127(3): 627–634.
Published Online: January 13, 2005
... of the v 2 ¯ − f model is also compared with other eddy-viscosity-based turbulence models, including a version of the v 2 ¯ − f model, available in FLUENT . The importance of preventing unphysical growth of turbulence kinetic energy in stator vane flows, here by use of the realizability constraint...
Journal Articles
Article Type: Technical Papers
J. Turbomach. October 2004, 126(4): 445–454.
Published Online: December 29, 2004
... computational fluid dynamics viscosity vortices One of the more significant design trends in recent years is the use of aerodynamic sweep to improve the performance and stability of transonic compressor blades. The experimental and analytical studies of single and multistage fans by Wadia et al. 1 2...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2004, 126(3): 395–405.
Published Online: September 3, 2004
... stators flow simulation viscosity The most significant contribution to the unsteadiness in a turbine is due to the periodic chopping of the wake (Hodson 1 ) and secondary flow vortices from the upstream blade row by the downstream blade row (Chaluvadi et al. 2 3 , Sharma et al. 4 , Boletis...
Journal Articles
Article Type: Technical Papers
J. Turbomach. October 2006, 128(4): 627–631.
Published Online: March 1, 2004
..., and are consistent with the mass-averaged compressor speedline characteristics generated from the CFD results. 01 10 2003 01 03 2004 13 06 2004 17 06 2004 blades compressors computational fluid dynamics impellers flow instability viscosity optimisation aerodynamics design...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2003, 125(3): 455–464.
Published Online: August 27, 2003
... airfoil conditions. The intermittent behavior of the transitional flows is taken into account and incorporated into computations by modifying the eddy viscosity, μ t , with the intermittency factor, γ. Turbulent quantities are predicted by using Menter’s two-equation turbulence model (SST...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2002, 124(3): 410–418.
Published Online: July 10, 2002
... computational fluid dynamics classification aerodynamics viscosity wakes flow instability 04 June 2001 24 October 2000 10 07 2002 Contributed by the International Gas Turbine Institute and presented at the International Gas Turbine and Aeroengine Congress and Exhibition, New...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2002, 124(3): 341–350.
Published Online: July 10, 2002
.... The present work uses the two-equation standard k − ε turbulence model of Launder and Spalding 8 to estimate the eddy viscosity. This turbulence model is a high Reynolds number model which requires the use of wall functions at solid surfaces and is valid from the beginning of the log-layer...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2002, 124(3): 419–428.
Published Online: July 10, 2002
... aerodynamics transonic flow flow instability viscosity computational fluid dynamics pressure rotors As already indicated by the almost constant level of pressure distortions in the first vane passing frequency in Fig. 11 , the local variation of the pressure amplitude along the blade surface shown...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2002, 124(3): 331–340.
Published Online: July 10, 2002
... 24 January 2002 10 07 2002 aircraft compressors aerodynamics gas turbines design engineering viscosity instrumentation Application of aero-engine technology to ground-based gas turbines has increased rapidly, especially in the last decade, as documented in the works...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2002, 124(3): 485–498.
Published Online: July 10, 2002
... viscosity-affected layer; 2) inclusion of the anisotropy of turbulent transport coefficients for all transport equations; 3) near-wall variation of the turbulent Prandtl number as a function of the local Reynolds number. Most of the important aspects of the proposed model are based on known DNS statistics...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2002, 124(1): 152–159.
Published Online: August 1, 2001
... instability stators aerodynamics viscosity subsonic flow boundary layer turbulence The flow between stator and rotor blade rows in turbomachinery cascades is inherently three-dimensional and unsteady. Demands for improved performance, fewer stages, and fewer blades per stage result in highly...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2001, 123(3): 614–620.
Published Online: March 1, 2001
... numerically. The Reynolds turbulent stress tensor is calculated by two methods, namely, an eddy viscosity model (EVM) and an explicit algebraic stress model (EASM). The pressure–velocity coupling is handled by the SIMPLEC algorithm and calculations were carried out on a collocated grid. The convection...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2002, 124(1): 61–68.
Published Online: February 1, 2001
... and Exhibition, New Orleans, Louisiana, June 4–7, 2001. Manuscript received by the International Gas Turbine Institute February 2001. Paper No. 2001-GT-303. Review Chair: R. Natole. 04 June 2001 01 February 2001 gas turbines aerodynamics flow simulation viscosity laminar to turbulent...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2001, 123(3): 568–582.
Published Online: February 1, 2001
... for publication in the ASME JOURNAL OF TURBOMACHINERY . Manuscript received at ASME Headquarters February 2001. Associate Editor: T. H. Okiishi. 01 February 2001 gas turbines flow instability viscosity flow simulation Navier-Stokes equations Laplace transforms finite element analysis...