Results 211 to 220 of about 12,641 (264)
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Research on the flow field and film cooling effectiveness of the endwall with swirling film cooling
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2022In order to obtain the effect of endwall secondary flow on the swirling film cooling, a geometric model of cascade is established to research the endwall swirling film cooling and swirling flow induced by prismatic jet impingement configurations. Numerical simulation is applied to investigate three jet flow configurations on the endwall film cooling ...
Jian Zhang +4 more
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Effects of Curvature on the Film Cooling Effectiveness of Double-Jet Film Cooling
Volume 5B: Heat Transfer, 2014The effect of curvature on the film cooling characteristics of Double-Jet Film Cooling (DJFC) was numerically investigated using three-dimensional Reynolds-Averaged Navier-Stokes (RANS). The low-Reynolds number shear stress transport (SST) model was employed as the turbulence closure model.
Gaoliang Liao +3 more
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Predictions of Adiabatic Film Cooling Effectiveness for Effusion Film Cooling
Volume 4: Turbo Expo 2007, Parts A and B, 2007This paper presents computational predictions of adiabatic film cooling effectiveness for effusion cooling systems with 90° and 30° holes. Predictions are performed for a range of coolant injection mass flow rates per unit surface area, G, of 0.1kg/sm2 - 1.6 kg/sm2 for 90° holes with constant pitch-to-diameter ratio of X/D = 11 and 10 rows of holes and
Nadiahnor Md. Yusop +5 more
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Exploitation of Acoustic Effects in Film Cooling
Journal of Engineering for Gas Turbines and Power, 2014There have been numerous studies of the behavior of shaped film cooling holes for turbine applications. It is known that the introduction of coolant is an unsteady process, and a handful of studies have described and characterized the unsteadiness. To the best of our knowledge, there are no studies in which unsteady acoustic effects have been actively ...
Collins, M, Povey, T
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The effect of unsteadiness on film cooling effectiveness
33rd Aerospace Sciences Meeting and Exhibit, 1995Abstract : A unique feature of turbine rotor blade film cooling is the main flow unsteadiness caused by the upstream stator vanes. The combined effect of the vane inviscid flow field and the trailing edge wake results in a rapidly changing external pressure at the film cooled blade surface.
Jeffrey Bons +4 more
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Transactions of the Canadian Society for Mechanical Engineering, 1991
Measurements of the flow field and film cooling effectiveness downstream of a two-dimensional inclined slot were made. A two-dimensional numerical model solving the transport equations in curvilinear orthogonal coordinate system was developed to simulate film cooling process. Comparisons were made between numerical and experimental results.
I. Gartshore, M. Salcudean, P. Matys
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Measurements of the flow field and film cooling effectiveness downstream of a two-dimensional inclined slot were made. A two-dimensional numerical model solving the transport equations in curvilinear orthogonal coordinate system was developed to simulate film cooling process. Comparisons were made between numerical and experimental results.
I. Gartshore, M. Salcudean, P. Matys
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Effect of Rotation on Flow Field and Film Cooling Effectiveness in Film-Cooled Turbine Rotors
International Journal of Turbo & Jet-Engines, 2014AbstractExperimental and numerical investigations of flow field in a film-cooled turbine model under stationary and rotating conditions in a low-speed wind tunnel are conducted. The effects of different blowing ratios (M = 1.5, 2) on the flow field are studied.
Xiaocheng Zhu, Liangliang Liu, Feng Yuan
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The Effect of Freestream Turbulence on Film Cooling Adiabatic Effectiveness
Volume 3: Turbo Expo 2002, Parts A and B, 2002The film-cooling performance of a flat plate in the presence of low and high freestream turbulence is investigated using liquid crystal thermography. High-resolution distributions of the adiabatic effectiveness are determined over the film-cooled surface of the flat plate using the hue method and image processing.
James E Mayhew +2 more
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Slot film cooling ? The effect of separation angle
Acta Mechanica, 1994Previous studies of slot film cooling have mainly concentrated on a flow geometry so arranged that the slot is flush in the containing wall. It is known that when the total pressure head of the injected flow is less than the free stream head, separation from the front of the slot is tangential to the wall (the so-called ‘lid’ effect).
Fitt, A. D., Wilmott, P.
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Volume 5A: Heat Transfer, 2017
To understand film cooling flow fields on a gas turbine blade, this paper reports a series of large-eddy simulations of an inclined round jet issuing into a crossflow. Simulations were performed at constant momentum ratio conditions, IR = 0.25, 0.5, 1.0 and Reynolds number, Re = 15,300, based on the crossflow velocity and the film cooling hole diameter.
Eiji Sakai, Toshihiko Takahashi
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To understand film cooling flow fields on a gas turbine blade, this paper reports a series of large-eddy simulations of an inclined round jet issuing into a crossflow. Simulations were performed at constant momentum ratio conditions, IR = 0.25, 0.5, 1.0 and Reynolds number, Re = 15,300, based on the crossflow velocity and the film cooling hole diameter.
Eiji Sakai, Toshihiko Takahashi
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