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- W2000563702 abstract "Measurements were taken of the exit velocity and turbulence intensity distributions for film cooling holes fed from a narrow plenum above the middle jet in a row of five jets using hot-wire anemometry. Parameters varied in the experiments included the length-to-diameter ratio of the holes, the coolant-to-mainstream blowing ratio, the angle of inclination of the holes, and the plenum flow direction, which was either in the same direction as, or opposite to, the mainstream. Flow visualization within the film cooling holes and in the plenum revealed large secondary flow structures that affected the jet exit velocity distributions. The exit velocity profiles for short holes had “peaky” signatures associated with jetting in the upstream portion of the 35° holes and in the downstream portion of the 90° holes. For the longer holes, the exit velocity profiles were more uniform. Crossflow boundary layer fluid was found to enter into the film cooling holes in some short hole configurations. The coolant feed direction affects the details of the flow separation at the hole entrance and within the hole, and consequently influences the jet exit velocity profile. These effects are most pronounced for higher blowing ratios." @default.
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- W2000563702 date "1999-06-07" @default.
- W2000563702 modified "2023-09-23" @default.
- W2000563702 title "Influence of Coolant Feed Direction and Hole Length on Film Cooling Jet Velocity Profiles" @default.
- W2000563702 doi "https://doi.org/10.1115/99-gt-035" @default.
- W2000563702 hasPublicationYear "1999" @default.
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