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Sweeping Jet Film Cooling at High Blowing Ratio on a Turbine Vane
Volume 5B: Heat Transfer, 2019Abstract Experimental and numerical investigations were conducted to study the effects of high blowing ratios and high freestream turbulence on sweeping jet film cooling. Experiments were conducted on a nozzle guide vane suction surface in a low-speed linear cascade.
Mohammad A. Hossain +3 more
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Film cooling in the trailing edge cutback with different land shapes and blowing ratios
International Communications in Heat and Mass Transfer, 2021Abstract The cutback was widely used in advanced gas turbines to protect the trailing edge. The land was a main structure in the cutback region. Therefore, the present study describes a numerical investigation on the film cooling performance in the cutback region with various land shapes (straight- expanding land, arch- expanding land, contracting ...
Wei Du +3 more
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39th Aerospace Sciences Meeting and Exhibit, 2001
An experimental investigation of the flowfields created by injecting normal to a blended missile fuselage at low blowing ratios into a Mach 3.0 (Re/m = 5.5xl0) freestream was performed. These experiments were performed to document the flow dynamics at low blowing ratios with the goal of understanding observed force reversal created by the jet ...
Zakaria Mahmud, Rodney Bowersox
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An experimental investigation of the flowfields created by injecting normal to a blended missile fuselage at low blowing ratios into a Mach 3.0 (Re/m = 5.5xl0) freestream was performed. These experiments were performed to document the flow dynamics at low blowing ratios with the goal of understanding observed force reversal created by the jet ...
Zakaria Mahmud, Rodney Bowersox
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Turbine Blade Tip Film-Cooling and Heat Transfer Measurements at High Blowing Ratios
Volume 5B: Heat Transfer, 2014Film-cooling and heat transfer characteristics of a gas turbine blade tip with a suction side rail was investigated in a stationary 3-blade rectilinear cascade. Mounted at the end of a blow-down facility the cascade operated at inlet and exit Mach numbers of 0.29 and 0.75, respectively.
Diganta Narzary +4 more
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Double-Jet Film-Cooling for Highly Efficient Film-Cooling With Low Blowing Ratios
Volume 4: Heat Transfer, Parts A and B, 2008Further improvement of the thermal efficiency of modern gas turbines can be achieved by a further reduction of the cooling air amount. Therefore, it is necessary to increase the cooling effectiveness so that the available cooling air fulfils the cooling task even if the amount has been reduced. In particular, the cooling effort for the vanes and blades
Karsten Kusterer +4 more
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Large-Eddy Simulations of trailing-edge cutback film cooling at low blowing ratio
Proceedings of the Sixth International Symposium On Turbulence, Heat and Mass Transfer, 2009Abstract For high-pressure turbine blades, an efficient cooling of the trailing edge can be achieved by ejecting a film into the flow over a cutback on the pressure-side of the blade. Here, results of well-resolved Large-Eddy Simulations (LES) are reported that match an existing experimental setup.
Schneider, H. +2 more
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Effects of Oscillations in the Mainstream on Film Cooling at Various Blowing Ratios
Volume 5A: Heat Transfer, 2017The objective of this study is to understand the effects of flow oscillations in the mainstream and film cooling jets on film cooling at various blowing ratios (0.5, 0.78, 1.0 and 1.5). These oscillations could be caused by the combustion instabilities. They are approximated in sinusoidal form for the current study. The effects of different frequencies
Seung Il Baek, Savas Yavuzkurt
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Solution blow spun titania nanofibers from solutions of high inorganic/organic precursor ratio
Ceramics International, 2018Abstract In this work titania nanofibers were produced from different precursor solutions by solution blow spinning. Hydrophilic polyvinylpyrrolidone, hydrophobic poly(vinyl acetate) and amorphous and semi-crystalline poly(lactic acid) polymers were used with green-solvents and titanium isopropoxide as the inorganic precursor.
A.M.C. Santos +5 more
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ASME 2024 Heat Transfer Summer Conference
Abstract Effusion cooling has emerged as an advanced cooling technique for applications that function at high temperatures, especially in gas turbines. Although this technology has shown higher cooling effectiveness compared to traditional cooling schemes, it is not yet considered a sustainable application for turbine stators and rotors ...
Omar Deyab Aly +2 more
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Abstract Effusion cooling has emerged as an advanced cooling technique for applications that function at high temperatures, especially in gas turbines. Although this technology has shown higher cooling effectiveness compared to traditional cooling schemes, it is not yet considered a sustainable application for turbine stators and rotors ...
Omar Deyab Aly +2 more
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Change of the Orbital Volume Ratio in Pure Blow-out Fractures Depending on Fracture Location
Journal of Craniofacial Surgery, 2013The purposes of this study were to observe bony orbital volume (OV) changes in pure blow-out fractures according to fracture location using a facial computed tomographic scan and to investigate whether the OV measurements can be used as a quantitative value for the evaluation of the surgical results of the acute blow-out fracture.Forty-five patients ...
Sang Ah, Oh +3 more
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