Results 231 to 240 of about 12,641 (264)
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Rotational effects on film cooling performance
International Journal of Numerical Methods for Heat & Fluid Flow, 2012PurposeNumerical simulations were carried out for two cooling schemes, a circular hole and a louver cooling scheme, at the leading edge of a rotor blade in a complete turbine stage.Design/methodology/approachTwo holes were positioned at the leading edge of a rotating blade, one on the pressure side and the other on the suction side. The methodology was
C.X‐Z. Zhang, I. Hassan
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Effects of Jet Geometries on Film-cooling Effectiveness
2007Numerical simulations based on control volume method and RNG k-e turbulence model were performed to investigate the flow and heat transfer characteristics of the flat plate film cooling, squirting out from a cone-shaped jet orifice with a diffuser angle of γ to be 300 and a round-shaped jet orifice respectively.
Ling Zhang +3 more
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Understanding the Effect of Trenching on Film Cooling
ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 3, 2007Recently, there has been a strong focus on film cooling holes embedded in trenches. In this study, film cooling predictions are used to understand the mechanisms of the jets that exit these trenched holes. The present work employs RSM (Reynolds stress transport models) for simulation of turbulent flows in film cooling and the simulation was run using ...
Yiping Lu, Srinath V. Ekkad
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Film-Cooling Effectiveness From Shaped Film Cooling Holes for a Gas Turbine Blade
Volume 4: Heat Transfer, Parts A and B, 2008The effect of film cooling holes placed along the span of a fully-cooled high pressure turbine blade in a stationary, linear cascade on film cooling effectiveness is studied using the Pressure Sensitive Paint (PSP) technique. Six rows of compound angled shaped film cooling holes are provided on the pressure side while four such rows are provided on the
Shantanu Mhetras +2 more
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Journal of Engineering for Power, 1977
Experiments have been performed on the film cooling of gas turbine blades in order to study the influence of large temperature differences on the effectiveness of film cooling. A two-dimensional flat plate model was tested in a stream of 1000 K combustion gases flowing at between 110 and 170 m/s. The model was cooled on both sides by jets of air coming
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Experiments have been performed on the film cooling of gas turbine blades in order to study the influence of large temperature differences on the effectiveness of film cooling. A two-dimensional flat plate model was tested in a stream of 1000 K combustion gases flowing at between 110 and 170 m/s. The model was cooled on both sides by jets of air coming
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Improved Film Cooling Effectiveness With a Round Film Cooling Hole Embedded in a Contoured Crater
Journal of Turbomachinery, 2014Studies of film cooling holes embedded in craters and trenches have shown significant improvements in the film cooling performance. In this paper, a new design of a round film cooling hole embedded in a contoured crater is proposed for improved film cooling effectiveness over existing crater designs.
Prasad Kalghatgi, Sumanta Acharya
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Adiabatic Film Cooling Effectiveness Measurements Throughout Multi-Row Film Cooling Arrays
Volume 5C: Heat Transfer, 2016Adiabatic film cooling effectiveness measurements are obtained using pressure-sensitive paint (PSP) on a flat film cooled surface. The effects of blowing ratio and hole spacing are investigated for four multi-row arrays comprised of 8 rows containing 52 holes of 3.8 mm diameter with 20° inclination angles and hole length-to-diameter ratio of 11.2.
Greg Natsui +5 more
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Effects of Entrance Crossflow Directions to Film Cooling Holes
Annals of the New York Academy of Sciences, 2001Abstract: Two‐dimensional distributions of local adiabatic film cooling effectiveness as well as discharge coefficients have been measured to investigate the effect of different entrance crossflow orientations and magnitudes on film‐cooling performance.
Saumweber, Christian +3 more
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Volume 5C: Heat Transfer, 2018
Several double-jet film-cooling (DJFC) hole geometries on a flat plate are investigated in this paper. Pressure sensitive paint (PSP) is used to measure the film-cooling effectiveness on the flat plate. The streamwise distance between the DJFC holes varies as s/d = 3.0, 4.0, 5.0, and 6.0, while three different spanwise distance conditions are ...
Jiaxu Yao +4 more
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Several double-jet film-cooling (DJFC) hole geometries on a flat plate are investigated in this paper. Pressure sensitive paint (PSP) is used to measure the film-cooling effectiveness on the flat plate. The streamwise distance between the DJFC holes varies as s/d = 3.0, 4.0, 5.0, and 6.0, while three different spanwise distance conditions are ...
Jiaxu Yao +4 more
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Effect of adverse pressure gradient on film cooling effectiveness
6th Fluid and PlasmaDynamics Conference, 1973V. ZAKKAY, CHI R. WANG, M. MIYAZAWA
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