FIELD: engines and pumps.
SUBSTANCE: stage of gas turbine with holes for dust concentrate discharge from cooling system comprises working and nozzle cooled blades that make the turbine wheel space, swirling apparatus with holes to fee cooling air to turbine components cooling system. Swirling apparatus has at least one extra dust concentrate discharge hole made at 0°<α<90° in working wheel rotation direction and at 0°<β<60° from engine axis. Dust concentrate discharge hole is located radially above cooling air feed holes in meridional plane at spacing larger than one cooling air feed hole diameter.
EFFECT: higher turbine reliability.
3 dwg
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Authors
Dates
2014-06-27—Published
2013-02-26—Filed