... 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 01 06 2006 06 06 2006 2007 American...

... of the separation bubbles for the three simulations with oscillating external flow listed in Table 1 . Owing to the large oscillation-amplitude and period in simulation O1, compared to simulations O2 and O3, the maximum streamwise extent of the separation bubble is much larger. In all three simulations, a large...

... 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 2006 American...

... numbers, characteristic of aircraft cruise conditions, laminar flow is present over a significant portion of the blade surface and the general nature of the flow is both unsteady and transitional. laminar flow external flows bubbles rotational flow laminar to turbulent transitions flow...

... bladerows in the compressor. Recent studies have demonstrated that unsteady effects significantly alter the time-averaged boundary layer behavior, and as such have considerable impact on the compressor aerodynamics. compressors external flows flow simulation computational fluid dynamics wakes...

... 2004 01 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...

... 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...

... at solid walls. aerospace engines Navier-Stokes equations flow simulation design blades compressors fans transonic flow shock waves flow separation flow instability boundary layers turbulence external flows 01 10 2004 01 02 2005 The realizability concept proposed...

... 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...

... exposure to hot leakage gases leads to loss of performance and life through oxidation, erosion, rubbing against stationary outer casing, and high local thermal stresses. turbines external flows pressure measurement flow measurement aerospace engines heat transfer 14 October 2003...

..., 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 Extensive studies, mostly experimental...

... 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 1 Planview of the test section 2 Cascade blade geometry and balance test—( a ) cascade blade geometry, ( b ) cascade blade...

... in the JOURNAL OF TURBOMACHINERY . Manuscript received by the IGTI July 9, 2001; revised manuscript received March 10, 2003. Associate Editor: S. Sjolander. 09 July 2001 10 March 2003 27 08 2003 boundary layers flow separation turbines external flows viscosity boundary layer...

... turbines interface phenomena combustion chemically reactive flow vortices external flows cooling Today’s world heavily depends on gas turbine engines for military and commercial propulsion as well as for industrial applications. This dependence demands engines that are both durable...

... external flows The results presented in this paper are part of the European Research Project BRITE/EURAM CT96-0143 on “Turbulence Modelling of Unsteady Flows in Axial Turbines,” which was completed in 2000. The primary aim was to provide greater understanding of unsteady flow phenomena through...

... and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002. Manuscript received by the IGTI January 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...