Thermal Science 2017 Volume 21, Issue suppl. 1, Pages: 161-167
https://doi.org/10.2298/TSCI17S1161H
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Numerical investigation of condensing flow of low pressure steam turbine at different flow rate conditions
Huang Kezhen (China Ship Development and Design Center, Wuhan, China)
Cai Lin (Wuhan University, Key Laboratory of Hydraulic Machinery Transients, Wuhan, China + Wuhan University, School of Power and Mechanical Engineering, Wuhan, China)
Gao Jianshu (Wuhan University, Key Laboratory of Hydraulic Machinery Transients, Wuhan, China)
Liu Zhuo (Wuhan University, Key Laboratory of Hydraulic Machinery Transients, Wuhan, China)
Yu Xinggang (Wuhan University, Key Laboratory of Hydraulic Machinery Transients, Wuhan, China)
The numerical investigation on the wet steam flow in the last two stages of a
1000 MW fossil-fired low pressure steam turbine is presented in this paper.
The non-equilibrium model via the classical nucleation theory is employed to
simulate the condensing flow of the wet steam. The characteristics of the
flow filed from design condition to low volume flow condition are calculated
and the static performance of last stage moving blade is also obtained. The
development of the backflow phenomenon is clearly captured through the
analysis of the velocity triangle.
Keywords: low volume flow, steam turbine, condensation, windage condition, CFD