Abstract :

Compressors And Turbines That Use Axial Flow Raise (or, In The Case Of A Turbine, Extract) The Energy Carried By The Working Fluid And Properly Redirect Its Flow Between Stages. These Components Are Essential In Gas-turbine Aeroengines, Industrial Power Plants, And Large Process Compression Trains. The Material Choice For The Rotors Has Direct Effects On The Engines Mass, Burst Margin, And Service Life Because The Rotor Blades And Discs Must Endure A Substantial Centrifugal Body Load In Addition To Continuously Rotating At High Angular Speed, Something That The Stationary Stator Row Never Encounters. The Central Hub, Twenty-one Aerofoil Blades Per Row Generated As Multi-section Lofts, And A Connecting Shaft Make Up A Representative Two-row, Integrally Bladed Rotor-stator Disc. This Paper Details The Solid Modeling And Static-structural Finite Element Analysis Of This Disc, And It Assesses Three Potential Disc/blade Materials: Structural Steel, Commercially Pure Annealed Nickel, And Commercially Pure Grade-2 Titanium, All Subjected To The Same Rotationalacceleration Load Case. Each Material Had Its Own Geometry Created In CATIA V5 Part Design And Then Imported Into ANSYS Workbench, Where A Default Tetrahedral Mesh Based On Curvature Was Formed. A Rotating Acceleration Of 10 Rad/s² Around The Shaft Axis And A Fixed Support At The Center Bore Were Added To The Model. While All Three Materials Experienced Relatively Small Deformations (12.37 Mm For Structural Steel, 13.69 Mm For Nickel, And 13.45 Mm For Titanium), The Resulting Margins Of Safety Were Very Different. While Structural Steel And Nickel Both Exceeded Their Elastic Limits Under The Applied Load, Titanium Maintained A Positive Margin Of Safety Of About 1.36 With A Peak Stress Of 230.99 MPa Against A 315 MPa Yield Strength. The Paper Explains That This Difference Is Due To Specific Strength, Which Is Defined As Yield Strength Divided By Density. It Then Connects This Finding To Titaniums Dominant Role In Gas Turbine Compressor Rotors And Lists The Model Extensions That Are Needed To Support A Certification Oriented Conclusion: Production-representative Alloy Grades, Steady-state Operating-speed Loading, Thermal Effects, And Fatigue/resonance Assessment.

Published:

31-7-2026

Issue:

Vol. 26 No. 7 (2026)

Page Nos:

1523 - 1528

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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