Turbine stator blades, blade segments, and gas turbines
The turbine stator blade design optimizes cooling air distribution through impingement cooling and circulation passages to enhance shroud cooling efficiency, addressing inefficiencies in existing gas turbine cooling systems and improving turbine performance.
JP7875028B2Active Publication Date: 2026-06-17MITSUBISHI HEAVY IND LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- MITSUBISHI HEAVY IND LTD
- Filing Date
- 2022-05-19
- Publication Date
- 2026-06-17
AI Technical Summary
Technical Problem
Existing gas turbine stator blades face inefficiencies in cooling the shroud due to suboptimal utilization of cooling air, which affects the overall efficiency of the turbine.
Method used
The turbine stator blade design incorporates recesses on the shroud with impingement plates and side passages to optimize cooling air distribution, allowing for efficient impingement cooling and circulation through first and second side passages, enhancing the use of cooling air to cool both covered and uncovered regions of the shroud.
Benefits of technology
This design improves the cooling efficiency of the shroud, effectively utilizing cooling air to suppress overheating and enhance the performance of the gas turbine by optimizing cooling air distribution and circulation.
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Smart Images
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Abstract
To improve the cooling efficiency at a shroud of a turbine stationary blade.SOLUTION: A turbine stationary blade in at least one embodiment of the present disclosure comprises an airfoil part, and a shroud provided on at least one of one side or the other side of the airfoil part in a blade height direction. The shroud has a recess formed on a face opposite to the airfoil part across a gas path face. The recess includes a first region covered with an impingement plate, and a second region not covered with an impingement plate. The shroud includes: a first opening formed in the first region; a first side passage formed from a front edge side toward a rear edge side at one first side end in a circumferential direction and connected to the first opening at its one end; a second opening formed in the second region; and a second side passage formed from a front edge side toward a rear edge side of the other second side end in the circumferential direction, and connected to the second opening at its end.SELECTED DRAWING: Figure 3
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