Air-collecting structure for enhancing cooling performance for transition piece and gas turbine combustor having same
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United States of America Patent
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Nov 17, 2020
Grant Date -
Mar 7, 2019
app pub date -
Jul 2, 2018
filing date -
Sep 6, 2017
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An air-collecting structure effectively cools a transition piece of a duct assembly in a gas turbine combustor. The structure includes a flow sleeve having a plurality of cooling holes and surrounding the transition piece, the cooling holes formed in a lateral side of the flow sleeve to receive a compressed cooling air and arranged in rows running parallel to each other in a longitudinal direction of the flow sleeve, the rows progressing up the lateral side from a lower row to a higher row; and a plurality of scoops arranged in correspondence with predetermined cooling holes among the plurality of cooling holes and configured to collect an amount of air according to row. Each scoop includes an inlet having a predetermined radius for collecting the compressed cooling air. The radius is constant for the scoops of any one row and increases from the lower row to the higher row.
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