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http://dx.doi.org/10.5293/kfma.2017.20.2.017

Rediction of Stage Efficiency Variation of a USC High Pressure Steam Turbine by Computational Fluid Dynamics  

Kang, Soo Young (Graduate School, Inha University)
Jang, Hyuck Jun (Graduate School, Inha University)
Lee, Jeong Jin (Graduate School, Inha University)
Kim, Tong Seop (Dept. of Mechanical Engineering, Inha University)
Park, Seong Jin (Doosan Heavy Industries & Construction)
Hong, Gi Won (Doosan Heavy Industries & Construction)
Publication Information
Abstract
Prediction of performance and operating characteristics of a state-of-the-art ultra-supercritical (USC) steam turbine is an important issue in many ways. Theoretical and empirical correlation equations, developed a few decades ago, have been widely used in commercial programs for a prediction of performance. To improve of these correlation equations and apply them to the high pressure turbine of a USC steam turbine, computational fluid dynamic analysis was carried out and correlation equations to calculate efficiency variation of each stage were made. Both fluid dynamic characteristic and thermodynamic performance was analyzed for the development of the correlation equations. In particular, the impact of flow addition through an overload valve (OLV) between stages was examined throughly. The trend of pressure drop due to the flow mixing by the OLV flow addition was analyzed and an efficiency correlation equation considering the OLV flow was also made.
Keywords
Steam Turbine; Ultra-supercritical; Copmutational Fluid Dynamics; Performance Analysis; Efficiency Correlation Equation; Over Load Valve;
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Times Cited By KSCI : 1  (Citation Analysis)
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