... separation from the ceiling as laminar flow separation is induced on the surface of the test-plate. The absence of flow separation on the ceiling surface was confirmed through flow visualization using tufts. The side view of the test-section is shown schematically in Fig. 1 . Thus far, studies...

... with a significant roughness induced response in the local skin friction. 08 07 2010 09 07 2010 27 06 2011 27 06 2011 blades combustion equipment laminar flow thermal conductivity turbulence Coal is the world’s most abundant fossil fuel and is expected to continue to play...

... values Tu = 5 % and Tu = 7 % were computed, but only results for the latter are included here. The level of agreement for the lower value is comparable. The flow geometry and mesh are shown in Fig. 1a . The pressure gradient imposed by the upper contoured wall leads to laminar-flow...

.... The presence of separation can adversely affect the performance of such airfoils, for which reattachment due to laminar-to-turbulent transition plays an important role. boundary layers bubbles flow instability flow separation laminar flow turbulence vortices 12 06 2007 03 08 2007...

... , Logos , Berlin . 12 09 2008 28 10 2008 13 07 2009 aerodynamics blades engines gas turbines heat transfer laminar flow statistical analysis surface roughness turbulence Surface roughness adversely affects turbomachinery performance by increasing external heat...

... 2008 06 07 2009 aerodynamics aerospace components blades boundary layer turbulence bubbles compressors computational fluid dynamics flow measurement flow separation laminar flow pressure measurement stators wakes 2007 IGTI Best Technical Paper The leading-edge...

... at the Turbine Blade Surface ,” JSME Int. J., Ser. B 1340-8054 , 41 , pp. 191 – 199 . 20 06 2008 05 08 2008 20 04 2009 aerodynamics blades boundary layer turbulence heat transfer laminar flow surface roughness turbines In Part I of this paper ( 1 ) two models...

... that of a laminar flow or early stages of transition and then develops into a more turbulent flow (e). The solid lines in the figure represent the SL of the horseshoe vortex and the PL of the horseshoe vortex based on the flow visualization results presented above. The evolution of the flow is studied along...

.... The optimum relative phase angle of the upstream wake and the downstream potential field can produce 0.25% of efficiency improvement through the reduction of the suction surface boundary layer loss. This reduction is mainly related to the calmed region and the laminar flow benefits that can be more...

... for predicting cascade stagnation-line heat transfer using only surface pressure calculations. aerodynamics boundary layers computational fluid dynamics flow simulation friction gas turbines laminar flow pressure measurement stagnation flow thermal resistance For example, consider the turbine...

... to rather predict an early than a late onset of transition. HPTV test cases—suction side, influence of roughness height 27 06 2006 02 07 2006 12 02 2008 boundary layer turbulence laminar flow heat transfer turbines aerodynamics surface roughness Increasing...

.... Heat Fluid Flow 0142-727X 10.1016/S0142-727X(98)10051-6 , 20 , pp. 95 – 104 . plates (structures) vortices boundary layers laminar flow blades friction laminar to turbulent transitions gas turbines Traditional transition prediction models developed from flat plate data fail...

... confirmed that is believed to be responsible for the smaller spreading angle of spots measured at the wall. This finding is expected to have important implications to the development of improved transition models that are used to predict heat transfer and skin friction for turbine blades. laminar flow...

... . Manuscript received by the Turbomachinery Division, October 15, 2003; revised manuscript received, November 9, 2003. Editor: D. Wisler. 15 October 2003 09 November 2003 09 02 2005 heat transfer boundary layer turbulence laminar flow laminar to turbulent transitions...

..., longer, turbulent region is swept downstream with the wake, leaving behind a more stable region of flow, very much like laminar flow [Figs. 5 ( f ) and 5 ( g )]. This region corresponds to the calmed region, normally observed behind a turbulent spot, as seen by Schubauer and Klebanoff 10 and Gostelow...

... flows. Cross-span velocity and u ′ distributions, row 5 pin, normalized by V max 01 10 2004 01 02 2005 turbulence heat transfer cooling laminar flow boundary layers flow separation flow instability friction anemometry Pin fin arrays...

..., the heat transfer on the turbine rotor changes significantly due to the flow acceleration/deceleration and the incoming flow angle variation. mass transfer heat transfer turbines blades wind tunnels laminar flow flow separation bubbles turbulence design The thermal load on the hot...

... by the IGTI December 2002; final revision March 2003. Paper No. 2003-GT-38304. Review Chair: H. R. Simmons. 16 June 2003 01 December 2002 01 March 2003 29 12 2004 turbines convection wakes bubbles boundary layers shear turbulence laminar flow flow instability...

... Congress and Exhibition, Atlanta, GA, June 16–19, 2003. Manuscript received by the IGTI Dec. 2002; final revision Mar. 2003. Paper No. 2003-GT-38303. Review Chair: H. R. Simmons. 16 June 2003 01 Dec 2002 01 Mar 2003 29 12 2004 wakes flow separation bubbles laminar flow...

... Cross Section ,” ASME J. Heat Transfer , 102 , pp. 285 – 291 . Chilukuri , R. , and Humphrey , J. A. C. , 1981 , “ Numerical Computation of Buoyancy Induced Recirculation in Curved Square Duct Laminar Flow ,” Int. J. Heat Mass Transfer , 24 , pp. 305 – 314 . Komiyama , Y...