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- W3023460466 abstract "Gas turbine blades have previously been shown to corrode due to condensation of sulfide vapor on a cooled blade surface. In the present investigation, water vapor was condensed on a film cooled surface, simulating the condensation of sulfide vapor on a turbine blade. The injection section consisted of one row of holes (inner diameter of 1.0 cm) inclined 30 degrees with the surface and inline with the main turbulent boundary layer flow. Experiments were carried out in a subsonic, zero pressure gradient, turbulent boundary layer with free stream velocities of 10.5, 15.75, and 21.0 m/sec. A cooling fluid (water at near 0°C) was circulated through the plate, cooling the test surface and causing free stream water vapor to condense. Measurements were made at three Reynolds numbers (based on hole diameter and free stream velocity): 7,000, 10,500, and 14,000; and at three blowing ratios: 0.4, 0.8, 1.2. The results show the existence of a “dryout” region downstream of each cooling hole. This region was dry while regions between the jets had water on the surface. This dryout region was triangularly shaped, with the apex as much as 30 jet diameters from the downstream edge of the jet. For each Reynolds number the lowest blowing ratio (M = 0.4) had the largest dryout region. These results indicate that injection can be used to prevent condensation of corrosive vapors on a film-cooled gas turbine blade.Copyright © 1987 by ASME" @default.
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- W3023460466 date "1987-05-01" @default.
- W3023460466 modified "2023-09-23" @default.
- W3023460466 title "Effects of injection on condensation on a film-cooled surface" @default.
- W3023460466 hasPublicationYear "1987" @default.
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