... 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...

... to the flat end wall. Local reductions in heat transfer are significant (factor of 3). This study demonstrates the potential of three-dimensional end-wall contouring for reducing the thermal loading on the end wall. 08 10 2006 31 05 2007 02 05 2008 external flows heat transfer...

... must be made with a mesh that allows at least the prediction of the important fluid structures of the smallest geometric scale, namely, the hole diameter. blades gas turbines jets computational fluid dynamics external flows coolants 2007 American Society of Mechanical Engineers ...

... simulation heat transfer numerical analysis external flows Periodic unsteadiness, caused by rotor-stator interaction, and relatively low Reynolds numbers are characteristic for flow in certain turbomachinery components. Both phenomena directly affect blade boundary layer transition, the tendency...

... occurring vortical 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...

... 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...

... instability boundary layers turbulence external flows Due to the trend in the design of modern aeroengines to reduce weight and to realize high pressure ratios fan and first-stage compressor blades are highly susceptible to flutter. At operating points with transonic flow velocities and high...

... 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...

... 02 2005 vortices 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...

... 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...

...., Thorp, S., Strazisar, A., and Bright, M., 2000, “Compressor Stability Enhancement Using Discrete Tip Injection,” ASME Turbo Expo, Munich, Germany. swirling flow compressors centrifuges rotational flow rotors aerodynamics flow instability surface waves (fluid) external flows...

... 01 Mar 2002 26 03 2004 compressors external flows flow instability flow separation wakes computational fluid dynamics boundary layer turbulence flow simulation hydraulic turbines laminar flow bubbles Modern compressors and turbines have reached efficiency levels...

... 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...

... 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 Contributed...

.... 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...

... interface phenomena external flows combustion chemically reactive flow cooling wind tunnels vortices 7 Contours of normalized temperatures (θ) in the stagnation plane for case 1 ( a ), case 2 ( b ), and case 3 ( c ) The thermal fields illustrated in Figs. 7 ( a - c ) show that the film...

..., 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...

... heat transfer nozzles external flows computational fluid dynamics Turbulence from combustion systems has a very large influence on heat transfer distributions of first stage vanes. New strategies for achieving very low NO x levels have produced a variety of new combustor...