Guzović, Zvonimir and Kovačić, Krešimir and Mihalić, Tihomir (2012) Non-stationary temperature stresses in the industrial steam turbine rotor. = Non-stationary temperature stresses in the industrial steam turbine rotor. In: The 16th International Research/Expert Conference ”Trends in the Development of Machinery and Associated Technology” - TMT 2012, 10.-12.09.2012., Dubai, Ujedinjeni Arapski Emirati.
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Guzovic-TMT12-079.pdf - Accepted Version Jezik dokumenta:English Download (628kB) | Preview |
Abstract
The usage of industrial steam turbines in different industrial branches (chemistry, petrochemistry, refineries, sugar and ethanol plants, etc.) for a generator drive for electricity generation or a mechanical drive for compressors, blowers and pumps, is characterized by the need for high flexibility of operation. High flexibility includes numerous start-ups, shut-downs and power changes during the useful life. Changes in power and steam mass flow lead to changes of the working fluid state in the single turbine stages, and thus their aerodynamic and thermodynamic characteristics. During these transient working regimes in steam turbine rotors, large space and time-dependent temperature gradients appear, which can result in high non-stationary temperature stresses, i.e. increased local stress concentrations, what has a negative impact on the useful life of the rotor. In the worst case they can cause fracture of the turbine rotor. Today, for the determination of thermal stressed state of the steam turbine parts the user softwares based on numerical methods are used. In this paper the results of numerical modelling and calculations of non-stationary temperature fields and related stresses in the rotor of industrial steam turbine of 35 MW power during transient operating regime (a cold startup)will be presented. The results of the calculations serve for estimation of the transient regime impact on the stresses of the rotor, as well as on its entire useful life.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Keywords (Croatian): | Industrial steam turbine, Transient regimes, Temperature stresses, Numerical modelling |
| Subjects: | TECHNICAL SCIENCE > Mechanical Engineering |
| Divisions: | 500 Department of Energy, Power Engineering and Environment > 520 Chair of Fluid Mechanics 500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery |
| Indexed in Web of Science: | No |
| Indexed in Current Contents: | No |
| Date Deposited: | 21 Mar 2016 10:51 |
| Last Modified: | 25 Mar 2016 10:16 |
| URI: | http://repozitorij.fsb.hr/id/eprint/5281 |
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