... in some respect. The more detailed 3D geometry did not significantly improve the comparison with experiment, which suggests deficiencies in the turbulence modeling, particularly in the complex mixing region near the preswirl nozzle jets. The predicted heat transfer near the receiver holes was also shown...

.... 06 07 2010 07 07 2010 31 05 2011 31 05 2011 cooling gas turbines Gaussian distribution geometry There is a need for reliability in gas turbine, in particular, for power generation and mechanical drive ( 1 ). As shown by Fadlun et al. ( 1 ) the operating point, fuel...

... of a largely separated LPT blade geometry with a high blade loading level. Comparisons were made with available experimental cascade results on the prediction of the inlet Reynolds number effect on surface static pressure distribution, suction surface boundary layer behavior, and the wake total pressure loss...

... it does not with the k - ε model, a larger shroud separation at the impeller exit seen with the SST and SST-RM models, and core flow differences are in the complex curved diffuser geometry. The results are discussed in terms of the production and dissipation of k predicted by the various models due...

...Edward M. J. Naylor; Cecilia Ortiz Dueñas; Robert J. Miller; Howard P. Hodson This paper presents a new design methodology for strutted S-shaped compressor ducts that allows for more aggressive designs while maintaining current levels of duct loss. A baseline duct geometry was selected, which had...

...Alok Sinha This paper deals with the development of an accurate reduced-order model of a bladed disk with geometric mistuning. The method is based on vibratory modes of various tuned systems and proper orthogonal decomposition of coordinate measurement machine data on blade geometries. Results...

...Budimir Rosic; John D. Denton; Eric M. Curtis; Ashley T. Peterson The geometry of the exit shroud cavity where the rotor shroud leakage flow reenters the main passage flow is very important due to the dominant influence of the leakage flow on the aerodynamics of low aspect ratio turbines. The work...

...L. Porreca; A. I. Kalfas; R. S. Abhari This paper presents a comprehensive study of the effect of shroud design in axial turbine aerodynamics. Experimental measurements and numerical simulations have been conducted on three different test cases with identical blade geometry and tip clearances...

... representative nondimensionals in terms of geometry and operating conditions. The main flow is heated and the injected coolant is cooled strongly to obtain the requisite density ratio. All three velocity components were measured using a nonintrusive stereoscopic particle image velocimetry (PIV) system...

... coefficient. The diffusion parameter is based on preliminary design flow variables and geometry. Computational simulations and single and multistage compressor data are used to show the applicability of the criterion over a range of blade design parameters. The criterion also enables determination of specific...

... porous medium approach for the bristle pack. The effectiveness of various conceptual geometries has been outlined in terms of flow field formation. Results disclose unique effects of geometry on pressure and flow fields such that a longer front plate drives outward radial flow while playing a protective...

... (structures) computational fluid dynamics design engineering geometry turbomachinery The brush seal has been successfully applied to rotating machinery since the 1980s. Numerous investigations have focused on extending brush seal performance for challenging applications. Over the years, structural...

... Coarse shingle 185 1150 1320 1610 − 0.6 Roughness height specified by the manufacturer The roughness geometries were measured through 3D laser triangulation scans. The statistical roughness parameters deemed to have the strongest influence on the flow are summarized in Table...

...J. E. Sargison, Mem. ASME; S. M. Guo; M. L. G. Oldfield, Mem. ASME; G. D. Lock; A. J. Rawlinson This paper presents the first experimental measurements on an engine representative nozzle guide vane, of a new film-cooling hole geometry, a con ¯ verging s ¯ lot - h ole ¯ or console. The patented...

...A. Tsalavoutas, Research Assistant; K. Mathioudakis, Associate Professor; A. Stamatis, Research Associate; M. Smith, Principal Engineer, The influence of faults in the variable geometry (variable stator vanes) system of a multistage axial compressor on the performance of an industrial gas turbine...

...” consists of capturing and controlling the geometry of a suitable portion of an aeroengine (e.g., a blade row, or an internal cooling system or a fan-plus-nacelle), building a mesh system, solving the flow and responding to an appropriately visualized flow field by changing or accepting the geometry...

... Institute February 1999. Paper No. 99-GT-46. Review Chair: D. C. Wisler. 01 February 1999 gas turbines cooling film flow surface phenomena geometry temperature measurement infrared spectra thermal conductivity finite element analysis In the present paper, the local surface...