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http://dx.doi.org/10.3741/JKWRA.2005.38.8.631

Hydraulic and Numerical Model Experiments of Flows in Circulation-Water-Pump Chambers  

Yi, Yong-Kon (Korea Institute of Water and Environment, Korea Water Resources Corporation)
Cheong, Sang-Hwa (Korea Institute of Construction and Technology)
Kim, Chang-Wan (Korea Institute of Construction and Technology)
Publication Information
Journal of Korea Water Resources Association / v.38, no.8, 2005 , pp. 631-643 More about this Journal
Abstract
The objective of this study is to perform hydraulic and numerical model experiments of the flows in circulation-water-pump(CWP) chambers of combined cycle power plants (CCPP) to be built and to suggest improvement plans if the flows might cause a serious problem on the operation of CWPs. Hydraulic model was constructed in a scale of 1 to 20 using acrylic sheets and a two dimensional numerical model used was RMA2. To evaluate results of Hydraulic and numerical model experiments, evaluation criteria of flow conditions in the intake canal and CWP chambers were determined. Vertical vorticities obtained from numerical simulations for the initial plan of CCPPs were qualitatively compared with results of hydraulic model experiments and the formation possibility of a large scale vortex, one of the flow evaluation criteria, was evaluated. The initial plan was found not to satisfy the flow evaluation. Nine improvement plans were devised and numerically simulated. Four alternative plans among nine improvement plans were selected and hydraulically experimented. On the ground of the results of hydraulic model experiments, a final improvement plan, one of four improvement plants, was suggested. When CWP chambers and intake canals were designed with spatial constraints, flow separating wall and guide walls were found to improve flow conditions in CWP chambers.
Keywords
circulation water pump; hydraulic model; intake canal; RMA2; vorticities;
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  • Reference
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