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Numerical Investigation on Overall Cooling Effectiveness of Narrow-Channel Double-Wall Cooling
ASME Journal of Heat and Mass TransferAbstract In the double-wall cooling of turbine blades, coolant migration can lead to uneven flow distribution, which, in severe cases, can cause hot gas intrusion into the film holes, affecting the lifespan of the blade. To mitigate the negative influence of coolant migration, this study proposes a novel double-wall system called the ...
Guangyao Xu +4 more
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International Journal of Heat and Mass Transfer, 2018
Abstract The overall cooling effectiveness, which represents the distribution of dimensionless temperature on gas turbines surface, is an important parameter for conjugate heat transfer analysis of gas turbines. Generally, it is difficult to measure the overall cooling effectiveness in engine condition.
Cun-liang Liu +3 more
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Abstract The overall cooling effectiveness, which represents the distribution of dimensionless temperature on gas turbines surface, is an important parameter for conjugate heat transfer analysis of gas turbines. Generally, it is difficult to measure the overall cooling effectiveness in engine condition.
Cun-liang Liu +3 more
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Overall Effectiveness of a Blade Endwall With Jet Impingement and Film Cooling
Journal of Engineering for Gas Turbines and Power, 2013Ever-increasing thermal loads on gas turbine components require improved cooling schemes to extend component life. Engine designers often rely on multiple thermal protection techniques, including internal cooling and external film cooling. A conjugate heat transfer model for the endwall of a seven-blade cascade was developed to examine the impact of ...
Amy Mensch, Karen A. Thole
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Adiabatic and Overall Effectiveness for the Showerhead Film Cooling of a Turbine Vane
Journal of Turbomachinery, 2012There have been a number of previous studies of the adiabatic film effectiveness for the showerhead region of a turbine vane, but no previous studies of the overall cooling effectiveness. The overall cooling effectiveness is a measure of the external surface temperature relative to the mainstream temperature and the inlet coolant temperature, and ...
Marc L. Nathan +3 more
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Volume 4: Heat Transfer; Electric Power, 1986
Future gas turbine combustion chambers and turbine blades require better cooling techniques to cope with the continual rise in operating temperatures with each new engine model. One technique that has been extensively investigated is that of transpiration cooling, for both combustion chambers (1–5) and turbine blades (6–9).
G. E. Andrews +3 more
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Future gas turbine combustion chambers and turbine blades require better cooling techniques to cope with the continual rise in operating temperatures with each new engine model. One technique that has been extensively investigated is that of transpiration cooling, for both combustion chambers (1–5) and turbine blades (6–9).
G. E. Andrews +3 more
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Journal of Turbomachinery, 2008
An experimental analysis for the evaluation of adiabatic and overall effectiveness of an effusion cooling geometry is presented in this paper. Chosen configuration is a flat plate with 98 holes, with a feasible arrangement for a turbine endwall. Fifteen staggered rows with equal spanwise and streamwise pitches (Sx/D=Sy/D=8.0), a length to diameter ...
A. Ceccherini +3 more
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An experimental analysis for the evaluation of adiabatic and overall effectiveness of an effusion cooling geometry is presented in this paper. Chosen configuration is a flat plate with 98 holes, with a feasible arrangement for a turbine endwall. Fifteen staggered rows with equal spanwise and streamwise pitches (Sx/D=Sy/D=8.0), a length to diameter ...
A. Ceccherini +3 more
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Applied Thermal Engineering, 2019
Abstract In this paper, a conjugate heat transfer model for the endwall of a turbine four-vane linear cascade is developed to examine the conjugate cooling effects generated by internal jet impingement and external film cooling as well as heat conduction through the metal endwall.
Xing Yang +7 more
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Abstract In this paper, a conjugate heat transfer model for the endwall of a turbine four-vane linear cascade is developed to examine the conjugate cooling effects generated by internal jet impingement and external film cooling as well as heat conduction through the metal endwall.
Xing Yang +7 more
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Volume 5B: Heat Transfer, 2014
The laminated cooling or the layered cooling configuration with integrated impingement, rib-roughed and film cooling can result in a high overall cooling effectiveness and is believed to be a promising cooling technology for the next generation of advanced gas turbines. Previous studies found that the relative locations among the film hole, impingement
Xiao-Dong Zhang +2 more
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The laminated cooling or the layered cooling configuration with integrated impingement, rib-roughed and film cooling can result in a high overall cooling effectiveness and is believed to be a promising cooling technology for the next generation of advanced gas turbines. Previous studies found that the relative locations among the film hole, impingement
Xiao-Dong Zhang +2 more
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Infrared Assessment of Overall Effectiveness of a Modern Turbine Vane Cooling Scheme
46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2010An experimental approach is used to evaluate a baseline vane airfoil cooling configuration for advanced gas turbine engine application by incorporating arrays of two types of cooling holes at prescribed angles, spacing and sizes into large-scale flat plate specimens.
Jamie Johnson +7 more
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Experimental investigations on overall cooling effect of ribbed channel with air bleeds
International Journal of Heat and Mass Transfer, 2012Abstract An experimental investigation on overall heat transfer performance of a rectangular channel, in which one wall has periodically placed oblique ribs to enhance heat exchange and cylindrical film holes to bleed cooling air, has been carried out in a hot wind tunnel at different mainstream temperatures, hot mainstream Reynolds numbers, coolant ...
Jianhua Wang +4 more
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