Results 211 to 220 of about 324,125 (244)
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Letters in Heat and Mass Transfer, 1974
Abstract Measured and predicted values of adiabatic-wall effectiveness for multi-slot film cooling are compared and shown to be in close agreement. Further calculations are presented to demonstrate that the longitudinal spacing of the slots can be optimized to result in a minimum number of slots and coolant mass-flow requirement.
C.O. Folayan, J.H. Whitelaw
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Abstract Measured and predicted values of adiabatic-wall effectiveness for multi-slot film cooling are compared and shown to be in close agreement. Further calculations are presented to demonstrate that the longitudinal spacing of the slots can be optimized to result in a minimum number of slots and coolant mass-flow requirement.
C.O. Folayan, J.H. Whitelaw
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Journal of Spacecraft and Rockets, 1972
1 Summerfield, M., "A Theory of Unstable Combustion in Liquid Propellant Rocket Systems," ARS Journal, Vol. 21, No. 5, Sept. 1951, pp. 108-114. 2 Crocco, L., "Aspects of Combustion Stability in Liquid Propellant Rocket Motors," Part 1, ARS Journal, Vol. 21, No. 6, Nov. 1951, pp. 163-178. 3 McKenna, K. J., Walker, J. H., and Winje, R.
KURT HERMAN, S. J. ANDRYSIAK
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1 Summerfield, M., "A Theory of Unstable Combustion in Liquid Propellant Rocket Systems," ARS Journal, Vol. 21, No. 5, Sept. 1951, pp. 108-114. 2 Crocco, L., "Aspects of Combustion Stability in Liquid Propellant Rocket Motors," Part 1, ARS Journal, Vol. 21, No. 6, Nov. 1951, pp. 163-178. 3 McKenna, K. J., Walker, J. H., and Winje, R.
KURT HERMAN, S. J. ANDRYSIAK
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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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Micro film cooling performance
International Journal of Heat and Mass Transfer, 2009A novel idea for micro film cooling experiment is proposed and conducted. Both fabrication of a micro film-cooled device and evaluation of its performance are presented. The film cooling device is placed in a wind tunnel system for evaluation with the blowing parameter (M) ranging from 1 to 12.5 and the film jet slot heights of 25 μm, 45 μm and 50 μm ...
P.L. Li +4 more
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Journal of Propulsion and Power, 2006
The durability of gas turbine engines is strongly dependent on the component temperatures. For the combustor and turbine airfoils and endwalls, film cooling is used extensively to reduce component temperatures. Film cooling is a cooling method used in virtually all of today's aircraft turbine engines and in many power-generation turbine engines and yet
D. G. Bogard, K. A. Thole
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The durability of gas turbine engines is strongly dependent on the component temperatures. For the combustor and turbine airfoils and endwalls, film cooling is used extensively to reduce component temperatures. Film cooling is a cooling method used in virtually all of today's aircraft turbine engines and in many power-generation turbine engines and yet
D. G. Bogard, K. A. Thole
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Film Cooling Effectiveness and Flow Structures of Butterfly-Shaped Film Cooling Hole Configuration
Volume 7A: Heat Transfer — Combustors; Film Cooling, 2023Abstract Film cooling is applied to various high-temperature components of a gas turbine and greatly affected by the shape of the injection hole. Numerous studies have been conducted to investigate various film cooling structures to increase the film cooling effectiveness by inducing coolants toward the surface.
Jin Young Jeong +4 more
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Film-Cooling Performance and Heat Transfer over an Inclined Film-Cooled Surface
Journal of Thermophysics and Heat Transfer, 2008Experiments have been performed to study and obtain the adiabatic wall film-cooling effectiveness and the heat transfer over a film-cooled surface that is made inclined at various angles with respect to a uniform flow. The vertical temperature distribution was measured to infer the flow structure and the rate of mixing of the film jet with the ...
C. S. Yang, C. L. Lin, C. Gau
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Film Cooling Effectiveness and Heat Transfer of Rectangular-Shaped Film Cooling Holes
Volume 3: Turbo Expo 2002, Parts A and B, 2002An experimental study has been conducted to measure the local film-cooling effectiveness and the heat transfer coefficient for a single row of rectangular-shaped holes. The holes have a 35° inclination angle with 3 hole diameter spacing of rectangular cross-sections.
Dong Ho Rhee +2 more
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2000
Es handelt sich um eine spezielle Methode zur Kuhlung von Oberflachen (engl.: heat protection), bei der durch diskrete Oberflachenoffnungen ein Fluidfilm zwischen das heise Gas der Ausenstromung und die Wand eingeblasen wird. Es besteht physikalisch eine enge Verwandtschaft zur sog. TranspirationskUhlung.
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Es handelt sich um eine spezielle Methode zur Kuhlung von Oberflachen (engl.: heat protection), bei der durch diskrete Oberflachenoffnungen ein Fluidfilm zwischen das heise Gas der Ausenstromung und die Wand eingeblasen wird. Es besteht physikalisch eine enge Verwandtschaft zur sog. TranspirationskUhlung.
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Double-Jet Ejection of Cooling Air for Improved Film Cooling
Journal of Turbomachinery, 2006Film cooling in gas turbines leads to aerodynamic mixing losses and reduced temperatures of the gas flow. Improvements of the gas turbine thermal efficiency can be achieved by reducing the cooling fluid amount and by establishing a more equal distribution of the cooling fluid along the surface.
Karsten Kusterer +3 more
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