New Approach to Calculations of Turbine Stages and Regeneration Extraction Points

• Autorzy: Szymaniak M.
• Języki publikacji: EN

Abstrakty

EN

The article presents 200MW LP turbine stage calculations taking into account leakage flows over rotor blades in the regeneration extraction point area. A methodology is described which allows the user to shorten the time-consuming CFD calculations solving the Navier-Stokes equation system in the examined area. A two-stage procedure was applied in which two types of calculations were coupled together. The first type is a one-to-one passage calculation of a steam flow through the turbine stages in the vicinity of the extraction point. This type of calculations preserves the circumferential periodicity condition. The second type is a circumferentially non-symmetrical calculation of the flow through an inter-stage diffuser with an extraction chamber. The calculations were preformed using 3D CFD codes, FlowER and FLUENT, in the two above mentioned areas, respectively. The solution was found using an iterative procedure for these areas coupled by boundary conditions, until convergence of calculations was reached.

Słowa kluczowe

EN

extension point; regenerative chambers; turbine stages; leakages

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2008
• Tom: Vol. 12, No 3-4
• Strony: 209--215
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Szymaniak M.

• Institute of Fluid-Flow Machinery PAS, Fiszera 14, 80-952 Gdansk, Poland,

Bibliografia

• [1] Gardzilewicz A 1995 Proc. 1st Turbine European Conference, VDI Verlag Berichte, Erlangen, Dusseldorf
• [2] Garkusza A W 1983 Aerodynamics of Steam Turbine, Maszynostrojenie, Leningrad (in Russian)
• [3] Gardzilewicz A, Świrydczuk J, Badur J, Karcz M, Werner R and Szyrejko Cz 2003 Trans. IFFM 113 157
• [4] Szymaniak M 2007 The Application of a Numerical Technique to Calculation of Steam Turbine Stages with Leakage Flows and Extractions, PhD Thesis, Institute of Fluid-Flow Machinery PAS, Gdansk (in Polish)
• [5] Yershov S and Rusanov A 1995 The Application Package FlowER for the Calculation of 3D Viscous Flows Through Multi-stage Turbomachinery, Certificate of State Registration of Copyright, Ukrainian State Agency of Copyright, Related Rights, Kijew
• [6] 2000 FLUENT/UNS/Rampant, User’s Guide, FLUENT Inc.