Results 41 to 50 of about 98,675 (218)
Experimental Investigation Into Unsteady Effects on Film Cooling
Volume 4: Heat Transfer, Parts A and B, 2010 The benefits of different film cooling geometries are typically assessed in terms of their time averaged performance. It is known that the mixing between the coolant film and the main turbine passage flow is an unsteady process. The current study investigates the forms of unsteadiness which occur in engine-representative film cooling flows, and how ...
Fawcett, R +4 more
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, 2020 This paper reports the dynamic wetting behavior and heat transfer characteristics for impinging droplets on heated bi-phobic surfaces (superhydrophobic matrix with hydrophobic spots).
Qi, Wenliang, Weisensee, Patricia B.
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Shape optimization of a bended film-cooling hole to enhance cooling effectiveness
Journal of Thermal Science and Technology, 2019 To improve cooling effectiveness of film-cooling hole, bending of hole was investigated and optimized using surrogate modelling based on three-dimensional Reynolds-averaged Navier-Stokes analysis. The turbulence was modeled using a shear stress transport
Jun-Hee KIM, Kwang-Yong KIM
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Film Cooling Effectiveness Data for Simple Injection Geometries: A Collection of Three-Axis Plots
International Journal of Rotating Machinery, 1994 A three-axis plot of laterally averaged film cooling effectiveness versus blowing rate and versus dimensionless distance downstream is a sufficiently compact representation of film cooling effectiveness data for injection through a row of holes or two ...
L. D. Stone, R. J. Goldstein
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Effect of spherical blockage configurations on film cooling
Thermal Science, 2018 With increasing inlet temperature of gas turbines, turbine blades need to be effectively protected by using cooling technologies. However, the deposition from the fuel impurities and dust particles in the air is often found inside film holes, which results in partial hole blockage.
Wang, Jin +4 more
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Experimental and simulation study on the effect of geometrical and flow parameters for combined-hole film cooling [PDF]
, 2016 Film cooling method was applied to the turbine blades to provide thermal protection from high turbine inlet temperatures in modern gas turbines. Recent literature discovers that combining two cylindrical holes of film cooling is one of the ways to ...
Hassan, Haswira
core
Efficacy of different antifouling treatments for seawater cooling systems [PDF]
, 2010 In an industrial seawater cooling system, the effects of three different antifouling treatments, viz. sodium hypochlorite (NaClO), aliphatic amines (Mexel1432) and UV radiation, on the characteristics of the fouling formed were evaluated.
APHA, AWWA, WPCF +11 more
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Simulation of turbine blade trailing edge cooling [PDF]
, 2009 The cause of overprediction of cooling efficiency by unsteady Reynolds averaged simulations of turbine blade trailing edge cooling flow is investigated. This is due to the deficiency in the level of unsteady coherent energy very near to the wall. Farther
Durbin, Paul +2 more
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Case Studies in Thermal EngineeringThe coolant ejected from the film holes on the gill region of the blade deflects to the blade tip in the action of the cascade passage vortices, resulting in the local film cooling failure on the suction surface near the endwall. This paper introduces an
Changyu Zhao +5 more
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Effect of Upstream Ramp on Film-Cooling effectiveness
International Journal of Emerging Trends in Engineering Research, 2021 Several techniques have been studied to improve the effectiveness of film cooling. One of these techniques involves the use of small obstacles to the removal holes injection. Objective of this study is to determine numerically the effect of the geometry and the obstacle position lover injection holes inclined 35 °, for the
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