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Keyword: Navier-Stokes equations
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Journal Articles
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041020.
Published Online: July 25, 2011
... temperatures of the coupon were measured using an Red/Green/Blue (RGB) camera with a two-color technique. blades boundary layer turbulence coating techniques computational fluid dynamics cooling discs (structures) fly ash gas turbines Navier-Stokes equations temperature distribution The...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041022.
Published Online: July 25, 2011
... grid points. A discussion of grid density and suitability of the grid for this simulation can be found in Refs. 2 12 . Figure 3 shows a section of the grid in the tip region (72 cells in tip to casing direction). blades flow instability heat transfer Navier-Stokes equations rotors...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031020.
Published Online: July 15, 2011
... NavierStokes equations supplemented with κ - ω -SST turbulence model. Of special interest herein is the flow physics resulting from optimization, revealing the intricate connections to the remarkable reduction in flow distortion and total pressure losses at the engine face. It is discovered that the...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031021.
Published Online: July 15, 2011
... present work. In this flow solver, the unsteady, three-dimensional, Reynolds averaged NavierStokes equations are written in conservative form in a curvilinear, body-fitted coordinate system and solved for density, absolute momentum components, and total energy. The space discretization is based on a cell...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021023.
Published Online: July 7, 2011
... show encouraging results. Further results are presented in a companion paper. 02 07 2010 30 07 2010 07 07 2011 07 07 2011 compressible flow jets Navier-Stokes equations turbomachinery In turbomachinery design ( 1 2 ), RANS models commonly encounter problems when...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021024.
Published Online: July 7, 2011
..., respectively. The Re = 300,000 (based on the bypass diameter, D b , and the maximum jet exit velocity U j ). Geometry and mesh for the coaxial nozzle. ( a ) Jet nozzle geometry and ( b ) near nozzle mesh. compressors flow simulation Navier-Stokes equations...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021021.
Published Online: June 30, 2011
... 0.10. The computations were performed by solving the Reynolds-averaged NavierStokes equations (Reynolds-averaged Navier–Stokes method) with the commercial finite-volume solver FLUENT using a low-Re shear stress transport (SST) k- ω turbulence model. The numerical grids were block-structured hexahedral...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021005.
Published Online: June 22, 2011
... based on the normalized variable approach (NVA) known in literature as self filtered centered difference ( 29 ) blended with a deferred approach with a first order upwind scheme. aerospace engineering aerospace engines blades flow simulation heat transfer Navier-Stokes equations Today...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041013.
Published Online: April 21, 2011
... 20 10 2010 21 04 2011 21 04 2011 compressible flow compressors confined flow Navier-Stokes equations rotating stall surge fan speed stall hysteresis stall inception stall recovery Recipient of the IGTI Technical Committee Best Paper Award for 2010...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041016.
Published Online: April 21, 2011
...Xinqian Zheng; Yangjun Zhang; Weidong Xing; Junyue Zhang Flow separation control was investigated on a compressor cascade using three types of fluidic-based excitations: steady suction, steady blowing, and synthetic jet. By solving unsteady Reynolds–averaged NavierStokes equations, the effect of...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041010.
Published Online: April 20, 2011
... fluid dynamics Navier-Stokes equations turbomachinery Fan, compressor, and turbine blades operate in annuli, which, in the majority of cases, are delimited by nonparallel end walls. The three-dimensional (3D) computational fluid dynamics (CFD) analysis of turbomachinery blade-rows based on the...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041004.
Published Online: April 19, 2011
... Navier-Stokes equations turbulence Axial compressors are widely used in gas turbines, particularly in applications where high thorough flow and efficiency are critical. The efficiency, stage pressure rise, and aerodynamic stability of axial compressors depend on several geometric factors...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031025.
Published Online: December 7, 2010
... 09 2009 21 12 2009 07 12 2010 07 12 2010 aerodynamics aerospace engines computational fluid dynamics mesh generation Navier-Stokes equations rotors turbomachinery Conventional turboprops have an inherent advantage over turbojet and turbofan engines for flight Mach...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031024.
Published Online: December 7, 2010
... aerodynamics cavitation channel flow finite volume methods heat transfer jets Navier-Stokes equations temperature distribution State-of-the-art gas turbine engines are designed to operate at turbine inlet temperatures over 1850 K. Since modern alloys can withstand temperatures up to about 1350 K...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031014.
Published Online: November 16, 2010
.... , and Martinelli , L. , 1997 , “ Optimum Aerodynamic Design Using the Navier-Stokes Equations ,” Proceedings of the AIAA 35th Aerospace Sciences Meeting and Exhibit , Reno, NV. Reuther , J. , Jameson , A. , Farmer , J. , Martinelli , L. , and Saunders , D. , 1996...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031010.
Published Online: November 15, 2010
... regions, up to 15% higher. The results for the endwall heat transfer were compared with results in open literature and were found to be comparable. 27 08 2009 22 05 2010 15 11 2010 15 11 2010 blades flow instability flow simulation gas turbines heat transfer Navier-Stokes...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2011, 133(2): 021027.
Published Online: October 27, 2010
... simulations are required to analyze the complex blade and endwall boundary layer interaction. 05 08 2009 03 09 2009 27 10 2010 27 10 2010 aerodynamics blades compressors flow simulation Navier-Stokes equations transonic flow vortices wind tunnels An improvement of...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2011, 133(2): 021017.
Published Online: October 25, 2010
... configurations were investigated numerically by solving the Reynolds-averaged NavierStokes equations using the finite-volume solver FLUENT . The numerical grids were generated by the hybrid grid generator CENTAUR . Three different turbulence models were considered: the realizable k - ε model with two-layer wall...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2011, 133(2): 021013.
Published Online: October 22, 2010
... predictions of unsteady aerodynamics. 21 07 2009 30 07 2009 22 10 2010 22 10 2010 aerodynamics blades compressors Navier-Stokes equations rotors stators transonic flow 3D viscous unsteady CFD simulations with k - ε turbulence model are performed using the...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2011, 133(2): 021002.
Published Online: October 19, 2010
... losses were determined in separate experiments by local static pressure measurements. Furthermore, a computational study was performed solving the Reynolds-averaged NavierStokes equations using the commercial finite-volume solver FLUENT . The numerical grids were generated using the hybrid grid...