... most of their entropy losses at the hole exit due to separation, whereas in compound angled jets, downstream thermal mixing between the jet and the freestream is the dominant mechanism. 22 08 2008 31 08 2008 06 07 2009 aerodynamics entropy external flows jets mixing...

... and strength of the secondary flow structures with contouring. external flows heat transfer numerical analysis turbulence The flow in blade passages is strongly three dimensional because of the secondary vortical flows established by the radial and pitchwise pressure variations in the passage...

... external flows coolants Modern gas turbine designs tend to push up the working gas temperature in order to increase the specific work and cycle efficiency. As a result, current and future heat management technologies of high-pressure turbine parts necessitate both full-coverage film cooling...

... of the turbulence in the oncoming wakes. 02 02 2005 02 02 2006 blades turbomachinery turbines fluid oscillations boundary layer turbulence flow separation shear turbulence flow instability bubbles flow simulation heat transfer numerical analysis external flows Periodic...

... structures. Pulsed film cooling is investigated using the transient IR technique to demonstrate the reduction of film cooling flow without sacrificing effectiveness performance or increasing of the heat transfer. jets film flow cooling external flows flow measurement valves 04 01 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...

... Mar 2003 09 02 2005 compressors external flows flow simulation computational fluid dynamics wakes boundary layers laminar to turbulent transitions aerodynamics Boundary layer transition plays an important role in compressor aerodynamic performance. The location and type...

... simple and the kinematics is well understood, although the detailed formation of the street and its development in all dimensions is much less obvious. vortices wakes transonic flow turbines blades aerodynamics external flows nozzles vibrations 01 10 2004 01 02 2005...

... be capable of accurately predicting steady and unsteady turbulent and transitional flow phenomena. aerospace engines Navier-Stokes equations flow simulation design blades compressors fans transonic flow shock waves flow separation flow instability boundary layers turbulence external...

... of internal flows, external flow, and heat transfer without the prescription of heat transfer coefficients. The numerical models consist of all internal flow passages and cooling hole rows, including shaped holes. Based on the results, deficiencies of the test configuration close to the leading edge region...

... heat transfer external flows flow measurement When a turbulent boundary layer approaches a bluff-body obstruction, the cross-stream-discrete adverse pressure gradient creates a three-dimensional separation, which rapidly reorganizes the boundary-layer vorticity into a leading-edge horseshoe...

... ENGINEERS for publication in the JOURNAL OF TURBOMACHINERY . Manuscript received by the ASME Turbomachinery Division, October 14, 2003; final revision, February 6, 2004. Editor: D. Wisler. 14 October 2003 06 February 2004 15 06 2004 turbines external flows pressure measurement...

...) external flows Extensive studies, mostly experimental, have been conducted on rotating stall and surge in centrifugal compressors. For example, Hunziker and Gyarmathy 1 present an analysis of the effect of subcomponent performance on the operational stability of a centrifugal stage with a vaned...

... and so counterbalance any extra losses associated with the same wake-induced turbulence. compressors external flows flow instability flow separation wakes computational fluid dynamics boundary layer turbulence flow simulation hydraulic turbines laminar flow bubbles 03 June...

... transfer rough surfaces turbulence external flows Introduction of roughness by ribs in flow passages is a popular method of enhancing heat transfer in the cooling passages, e.g., of turbine blades and combustors. The heat transfer and fluid flow in ribbed ducts have been extensively studied both...

.... 03 June 2002 10 October 2001 27 08 2003 mass transfer heat transfer turbines external flows sublimation turbulence flow measurement Tip leakage flow can have an important impact on the performance of a turbine system, in terms of aerodynamic losses and thermodynamic...

... of freestream turbulence, diverse pressure gradients, wide range of Reynolds numbers, flow separation, and unsteady wake-boundary layer interactions. boundary layers flow separation turbines external flows viscosity boundary layer turbulence 09 July 2001 10 March 2003 27 08 2003...

... 16, 2002. Paper No. 2002-GT-30527. Review Chair: E. Benvenuti. 03 June 2002 16 January 2002 23 04 2003 gas turbines interface phenomena external flows combustion chemically reactive flow cooling wind tunnels vortices The flow and thermal fields...

..., Amsterdam, The Netherlands, June 3–6, 2002. Manuscript received by the IGTI October 23, 2001. Paper No. 2002-GT-30476. Review Chair: E. Benvenuti. 03 June 2002 23 October 2001 23 04 2003 heat transfer external flows pipe flow cooling friction thermo-optical effects...

... for vane heat transfer predictive methods. Predictive comparisons are shown based on a two-dimensional boundary layer code using an algebraic turbulence model for augmentation as well as a transition model. nitrogen compounds combustion turbulence heat transfer nozzles external flows...