Design and Verification of Axial Flow Turbine in Aircraft Auxiliary Power End Based on Additive Manufacture
The strength of additive manufactured axial flow turbine was investigated based on finite element analysis method,and high-temperature axial flow turbine components in power end were formed by additive manufacturing tech-nology,which was verified by overturn test.The results indicate that the maximum deformation values of axial flow tur-bines by additive manufacturing all appear at the tip of the blade.The maximum equivalent stress value of turbine sur-face is close to the ultimate yield strength of GH4251 superalloy(830～923 MPa),while far away from the ultimate ten-sile strength(1 150～1 400 MPa),which meets the working requirements of axial flow turbines.The turbine can run safely for 5 minutes at 650℃and 115%of designed rotating speed,and the fluorescence and size inspection meet the requirements of navigation beacon,verifying the feasibility of additive manufacturing of superalloy axial flow turbine.
Additive ManufacturingAxial Flow TurbineFinite Element AnalysisOverspeed Test Verification
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