Volume 3: Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat Transfer in Electronic 2013
DOI: 10.1115/ht2013-17255 View full text |Buy / Rent full text
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Abstract: An advanced, high-effectiveness film-cooling design, the anti-vortex hole (AVH) has been investigated by several research groups and shown to mitigate or counter the vorticity generated by conventional holes and increase film effectiveness at high blowing ratios and low freestream turbulence levels. [1, 2] The effects of increased turbulence on the AVH geometry were previously investigated and presented by researchers at West Virginia University (WVU), in collaboration with NASA, in a preliminary CFD study [3]… Show more

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“…The current study presents the results of numerical study to visualize a multi-hole concept, the anti-vortex hole (AVH) that has been documented in previous studies [5]- [7]. The anti-vortex hole concept is shown in the current study as well as the previous studies to have its performance enhanced with elevated mainstream turbulence levels.…”
Section: Introductionmentioning
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“…The current study presents the results of numerical study to visualize a multi-hole concept, the anti-vortex hole (AVH) that has been documented in previous studies [5]- [7]. The anti-vortex hole concept is shown in the current study as well as the previous studies to have its performance enhanced with elevated mainstream turbulence levels.…”
Section: Introductionmentioning
“…Results from Repko et al [5] showed that varying the turbulent length scale does not have a major effect on the cooling effectiveness of the AVH, resulting in a reduction in the number of cases that are needed for comparison of different turbulence levels. Three different cases of varying turbulence intensity were studied by using both steady and unsteady Reynolds Averaged Navier Stokes (RANS and URANS) solvers in order to be able to analyze and compare the differences in the flow predictions by two different solution techniques.…”
Section: Numerical Studymentioning
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“…In fact, real gas turbine engines are frequently run under Tu by about 10% to 20%, as predicted by Mayhew et al [19]. Effects of Tu on the performance of film cooling of the turbine vanes and blades, flat plate, and cylindrical leading-edge models were numerically and experimentally investigated by many groups of researchers [20][21][22][23][24][25][26][27][28]. However, few experimental and numerical studies have hitherto been focused on a real situation regarding the cooling performances of turbine airfoils from simultaneous effects of TBC and Tu.…”
Section: Introductionmentioning