Certificate of Registration Media number Эл #ФС77-53688 of 17 April 2013. ISSN 2308-6033. DOI 10.18698/2308-6033
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Features of manufacturing technology for turbine blades with effusion cooling

Published: 12.11.2015

Authors: Tretyakov A.F.

Published in issue: #6(42)/2015

DOI: 10.18698/2308-6033-2015-6-1427

Category: Power, Metallurgic and Chemical Engineering | Chapter: Turbomachines and Combination Turbine Plants

The article describes a turbine blade front edge sweat cooling system. The system provides cooling gas output onto the surface and enhances thermal protection. To implement the method of turbine blade cooling it is necessary to develop processes of manufacturing the porous material sheets with the desired properties, stamping and consolidating the membrane with turbine blade housing. The article presents the results of engineering developments and experimental research of the possibility of using the porous meshed material for the turbine blade cooling system in high temperature combined-cycle plants with superheated steam. Technological processes of manufacturing porous meshed material sheets by vacuum hot-rolling the steel 12X18H10T with variable permeability, bending when membrane shaping on the profile of the turbine blade leading edge, and brazing the membrane to the blade body are developed. The results of mechanical and thermal tests have shown that the developed technology of manufacturing turbine blades with effusion cooling ensures cooling method efficiency and eliminate the possibility of penetrating hot gas through the porous membrane into the inner cavity of the blade.

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