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Keywords: laminar flow
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031019.
Published Online: July 15, 2011
... 2011 15 07 2011 blades boundary layer turbulence bubbles flow instability flow separation laminar flow plates (structures) Although modern gas-turbine engines are highly developed, small improvements in performance can still yield significant economic benefits. Since...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031016.
Published Online: November 18, 2010
... 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...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2010, 132(1): 011004.
Published Online: September 11, 2009
.... 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...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2009, 131(4): 041020.
Published Online: July 13, 2009
... rms / C X was 0.00036, the measured inlet turbulence was only 1%. Figure 8 shows that at this low turbulence intensity smooth surface calculations predicted laminar flow for all of the pressure and suction surfaces. A smooth fully turbulent calculation gave heat transfer rates much...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2009, 131(4): 041013.
Published Online: July 6, 2009
... 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...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2009, 131(3): 031017.
Published Online: April 20, 2009
... a low pressure turbine vane. In the majority of cases, the predictions from both models are in good agreement with the experimental data. 20 06 2008 05 08 2008 20 04 2009 aerodynamics blades boundary layer turbulence heat transfer laminar flow surface roughness turbines...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2009, 131(1): 011017.
Published Online: November 6, 2008
... 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...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2008, 130(4): 041017.
Published Online: August 4, 2008
.... 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...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2008, 130(2): 021001.
Published Online: February 12, 2008
... 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 In a gas turbine, the leading...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2008, 130(2): 021003.
Published Online: February 12, 2008
... boundary layer turbulence laminar flow heat transfer turbines aerodynamics surface roughness Increasing surface roughness is well known to have a major effect on the long-term efficiency and total cost of ownership of gas turbine engines. Besides increasing aerodynamic losses, surface...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2007, 129(4): 750–755.
Published Online: August 18, 2006
... observations. The current work therefore provides a basis for the modeling of transition on concave surfaces. 13 07 2006 18 08 2006 plates (structures) vortices boundary layers laminar flow blades friction laminar to turbulent transitions gas turbines Traditional transition...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. July 2005, 127(3): 545–551.
Published Online: July 1, 2005
... 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...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2005, 127(1): 230–239.
Published Online: February 9, 2005
... . 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...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2005, 127(1): 35–42.
Published Online: February 9, 2005
... Turbine and Aeroengine Congress and Exhibition, Atlanta, GA, June 16–19, 2003. Manuscript received by the IGTI Dec. 2002; final revision Mar. 2003. Paper No. 2003-GT-38972. Review Chair: H. R. Simmons. 16 June 2003 01 Dec 2002 01 Mar 2003 09 02 2005 laminar flow external...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2006, 128(1): 71–81.
Published Online: February 1, 2005
... in a Staggered Pin Fin Array ,” ASME Paper No. DETC 2001/CIE-21761. 01 10 2004 01 02 2005 turbulence heat transfer cooling laminar flow boundary layers flow separation flow instability friction anemometry Pin fin arrays are common cooling features used in turbine vanes...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2006, 128(1): 96–109.
Published Online: February 1, 2005
... ∕ Sc ) n The exponent, n , is dependent on the flow regime on the surface. For example, for a laminar flow, n is equal to 0.33 and the conversion equation is Nu = 0.675 Sh . In our previous studies of the impinging jet, the exponent of n = 0.4 has been used...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. October 2004, 126(4): 536–543.
Published Online: December 29, 2004
...-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 Historically, turbomachinery blading has been designed using...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. October 2004, 126(4): 544–550.
Published Online: December 29, 2004
... 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...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. July 2004, 126(3): 414–423.
Published Online: September 3, 2004
... 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...