Results 281 to 290 of about 98,951 (314)
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Influence of Film Cooling Holes Partial Blockage on Cooling Effectiveness
Volume 11: Heat Transfer and Thermal Engineering, 2021Abstract To study the effect of blockage on the film cooling performance, film cooling plate models with cylindrical hole, compound hole, and fan-shaped hole under the all-round blockage, leading-edge blockage, and trailing-edge blockage were established respectively. The anti-blockage performance of three kinds of the hole was compared.
Junhong Zhang +4 more
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On the Film Cooling Effectiveness Controversy
Volume 1A: Gas Turbines, 1979A relationship between isothermal and adiabatic film cooling effectiveness has been derived. Data from the open literature have been used to validate this relationship. This effectively uncouples short duration techniques from the concept of isothermal effectiveness.
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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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Convex Curvature Effects on Film Cooling Adiabatic Effectiveness
Volume 3B: Heat Transfer, 2013Surface curvature is known to have significant effects on film cooling performance, with convex curvature inducing increased film effectiveness and concave curvature causing decreased film effectiveness. Generally, these curvature effects have been presumed to scale with 2r/d at the film cooling hole location, where r is the radius of curvature and d ...
James R. Winka +4 more
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Effect of Vortex Generators on Film Cooling Effectiveness
Journal of Turbomachinery, 2015Film cooling is often adopted, where coolant jets are ejected to form a protective layer on the surface against the hot combustor gases. The bending of jets in crossflow results in counter rotating vortex pair (CRVP), which is a cause for high jet lift-off and poor film cooling effectiveness in the near field.
S. Sarkar, Ganesh Ranakoti
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Effect of Stagnation Regions on Film Cooling Effectiveness
Volume 4: Turbo Expo 2007, Parts A and B, 2007Over the last decades, researchers have investigated many aspects of film cooling. The present study investigates the impact of stagnation region created by a downstream airfoil on endwall film cooling effectiveness. Experimental measurements are presented for a single row of cylindrical holes inclined at 35° with hole length to diameter ratio, L/D = 7.
RodrÃguez, S. +4 more
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Research on cooling effectiveness in stepped slot film cooling vane
Journal of Thermal Science, 2016As one of the most important developments in air cooling technology for hot parts of the aero-engine, film cooling technology has been widely used. Film cooling hole structure exists mainly in areas that have high temperature, uneven cooling effectiveness issues when in actual use.
Yulong Li +3 more
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Effect of film cooling/regenerative cooling on scramjet engine performances
Journal of Propulsion and Power, 1994Film cooling was modeled to allow performance prediction of scramjet engine design. The model was based on experimental results of the compressible mixing layer for the vicinity of the injection slot, and on analytical results of the turbulent boundary layer in the region far from the slot.
Takeshi Kanda +3 more
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Impact on Adiabatic Film Cooling Effectiveness Using Internal Cyclone Cooling
Volume 5: Heat Transfer, Parts A and B, 2011The internal heat transfer of turbine blades can be augmented using cyclone cooling, but the consequential impact on the external film cooling may be significant. To determine these effects, the distribution of adiabatic film cooling effectiveness was measured on the surface of a symmetrical blade model containing a cylindrical leading-edge channel ...
Andreas Lerch +2 more
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DNS study of pulsed film cooling for enhanced cooling effectiveness
International Journal of Heat and Mass Transfer, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Muldoon, Frank, Acharya, Sumanta
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