Application of ANSYS FLUENT for structural calculations of rotor blades of the last stages of turbines

Аuthors

Bogomolova T. V.^*, Melnikov O. V.^**

Moscow Power Engineering Institute (National Research University), 14, Krasnokazarmennaja St., Moscow, 111250, Russia

*e-mail: Bogomolovatv@mpei.ru
**e-mail: mov87@rambler.ru

Abstract

The results of the calculations of the static strength of long blades of steam turbines with the software package ANSYS-WORKBENCH are presented. Described and illustrated the basic steps of calculations. The results are compared with data of known methods.
Long blades of last stages of steam turbine.
The method of strength calculation in software package ANSYS-WORKBENCH is based on finite element theory. For solid model finite element grid was constructed. The tensile stress was calculated by applying of rotation (3000 rpm). And the bending stress is result of applying computational fluid dynamic software package ANSYS-FLUENT. Boundary conditions for this case are total pressure on inlet and static pressure on outlet. The turbulence model is k-ε Realizable.
The strength of blades was calculated. Comparison between calculated stresses and data of known methods was done. All results in a good agreement. The maximum stress for 1760 mm blade is 361 MPa.

Keywords:

strength of blades, static loads, tensile stresses, bending stresses, breaking point

References

1. Bogomolova T.V. Poslednie stupeni parovyh turbin (The last stage in steam turbines) , Moscow, MPEI, 2008, 68 p.
2. Kostyuk A.G. Dinamika i prochnost' turbomashin ( Dynamics and strength of the turbomachines), Moscow, MPEI, 2007, 476 p.
3. Kostyuk A.G. Thermal Engineering, 2005, vol. 52, no. 4, pp. 16-27.
4. Simoju L.L., Lisjanskij A.S., Lagun V.P., Ivanov S.A., Purygina G.G. n. Jelectricheskie stancii, 2005, no. 10, pp. 51-55.

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