...Gottfried Laschet 21 01 2008 28 01 2008 28 02 2011 28 02 2011 cooling heat treatment numerical analysis plates (structures) transpiration velocity measurement In Figs. 7 8 of the published article the velocity profiles, induced by a negative unit pressure...

... in the seal region. 07 02 2010 22 02 2010 07 12 2010 07 12 2010 flow simulation gas turbines pressure measurement rotors seals (stoppers) stators velocity measurement In gas turbine stages, the ingestion of mainstream gas into rotor-stator disk cavities...

... Clearance Effects Caused by Shaft Failure , Rolls-Royce plc, Technical Report No. ED-5/M0087/02-DW. 26 07 2009 13 08 2009 26 10 2010 26 10 2010 blades compressors failure (mechanical) finite difference methods friction shafts turbines velocity measurement...

... turbulence velocity measurement wakes In multistage turbomachines, the evolution of the rotor boundary layer (BL) is affected by interactions with periodically impinging wakes shed by upstream blade rows. Flow inhomogeneities associated with these wakes inevitably alter the distributions...

... aerodynamics aerospace components blades flow visualisation pressure measurement turbines velocity measurement Implementation of high-lift airfoils in low-pressure turbine design is an attractive means to reduce engine weight and manufacturing costs. Several studies ( 1 2 3 ) have shown...

... solver, CEDRE . 06 08 2008 09 02 2009 16 09 2009 aerodynamics finite volume methods flow measurement flow visualisation jets Navier-Stokes equations velocity measurement State-of-the-art gas turbine engines are designed to operate at turbine inlet temperatures over...

... covers the full circumference of the gear, was fitted. The cross section is shown in Fig. 7 . aerospace engines gears lubricating oils torque measurement velocity measurement vortices Shroud cross section Figure 8 shows a large reduction in windage torque due to the shroud...

... between VGJ actuation and the wake passing was optimized. Both steady state C p and phase-locked velocity measurements confirm that the optimal combination of wakes and jets yields the smallest separation. Sondergaard , R. , Bons , J. P. , and Rivir , R. B. , 2002 , “ Control of Low...

... considered at blowing ratios of 0.25, 0.50, and 1.0 with a steady freestream and with wake Strouhal numbers of 0.15, 0.30, and 0.60. Temperature measurements were made using an infrared camera, thermocouples, and constant current (cold-wire) anemometry. Hot-wire anemometry was used for velocity measurements...

... for velocity measurements. The local film-cooling effectiveness was calculated based on the measured temperatures, and the results were compared to baseline cases with continuous blowing. Phase-locked flow temperature fields were determined from cold-wire surveys. Pulsing at high frequencies helped to improve...

...Tarek Meakhail; Seung O. Park This paper reports velocity measurement data in the interaction region between the impeller and vaned diffuser and the results of numerical flow simulation of the whole machine (impeller, vaned diffuser and volute) of a single stage centrifugal fan. Two-dimensional...

.... The three dimensional flow structures are revealed. 01 10 2004 01 02 2005 cooling flow instability wind tunnels coolants velocity measurement blades turbines test facilities film cooling flow structure density ratio blowing ratio PIV The main interest...

... = 4 mm slot width). A large part of the uncertainty in a quantity determined by averaging a set of samples, such as the time mean velocity measured by an LDA, can be caused by the fact that only a limited number of samples are used to calculate the average. Uncertainties in the mean velocity...

... is composed of the meridional velocity and the tangential velocity. The solid line corresponds to CFD, while the dotted line indicates the LDV results. Regarding the velocity distribution at 6 mm from the casing, the relative velocity measured by LDV between 0.08 to 0.35 of the abscissa shows good...

...D. G. Holmberg; T. E. Diller The gas turbine engine combustor generates turbulence that increases heat transfer on downstream turbine blades, but the mechanisms of that heat transfer are not fully understood. In this work, simultaneous time-resolved surface heat flux and velocity measurements have...

... without complementary flow dynamic investigations. The reason is partly that measuring fluid flow in a rotating coolant duct is a challenging. computational fluid dynamics velocity measurement pipe flow laser velocimetry Doppler measurement flow measurement vortices convection 16...

.... heat transfer pressure measurement pipe flow rotational flow velocity measurement flow measurement temperature measurement friction jets convection shear turbulence 2003 ASME ...

...-rate frequency). The overall aerodynamics, vibration and acoustic characteristics of the machine are significantly affected by both forms of unsteadiness. gas turbines flow instability flow visualisation wakes engines velocity measurement shear flow 03 June 2002 14 December...

... by the IGTI, November 2, 2001. Paper No. 2002-GT-30174. Review Chair: E. Benvenuti. 03 June 2002 02 November 2001 07 11 2002 gas turbines heat transfer cooling film flow flow visualisation velocity measurement turbulence jets Film cooling of a turbine vane typically...

... levels compared to the local levels around them. In fact, every region of wake intersection has an elevated turbulence level. gas turbines wakes rotational flow vortices velocity measurement shear turbulence flow instability The unsteady flow field around and in the wakes of the rotor...