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SCALE OPTIMIZATION FOR distorted model ON DIVERSION SYSTEM OF HYDROPOWER STATION

Journal of Hydrodynamics 1999年第3期11卷 61-67页

作者： Huang Guo fu, Wu Chao, Zhang Ting State Key Hydraulics Laboratory of High Speed Flows, Sichuan University, Chengdu 610065, P.R.China (Received Oct. 16, 1998)

Long diversion system of hydropower station, including surge tank, inlet tunnel and penstock, is an inseparable whole system. Scale effects of distorted model on the diversion system are studied in the present paper. Based on the concept of model scale correlation and the method of parameter expression of model scale, the model scale optimization can be realized. Furthermore, a quantitative criterion for the choice of distorted model or normal model is presented. The study shows that distorted model can simultaneously satisfy the similarity conditions derived from surge wave equations, water hammer equations and wave speed equation for the diversion system. In addition, an example for the design of a practical distorted model is provided.

关键词： scale optimization distorted model model test diversion system surge tank

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SITMILARITY LAW FOR HYDRAULIC distorted model

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Journal of Hydrodynamics 2003年第1期15卷 67-71页

作者： Wang Yong taoDepartment of Environmental Science and Engineering, University of Science and Technology of Suzhou, Suzhou 215011, ChinaCui Li Department of Civil Engineering, Dalian University of Technology, Dalian 116024, China Dept. of Environ. Sci. and Eng. Univ. of Sci. and Technol. of Suzhou Suzhou 215011 China Dept. of Civil Eng. Dalian Univ. of Technol. Dalian 116024 China

Newton's general similarity criterion was applied to the distorted model. Theresults for the similarities of gravity force, drag force and pressure force are identical withthose derived from relevant differential equations of fluid flow. And the selected limits of thedistorted ratio were studied and the simulation of roughness coefficient of distorted model wasconducted by means of hydraulic test.

关键词： distorted model similarity criterion distorted ratio simulation ofroughness coefficient

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Journal of Hydrodynamics 2001年第1期13卷 86-91页

作者： Wei Bing-qian, Kunihide Uchijima, Hiroshi Hayakawa Department of Civil Engineering, Kitami Institude of Technology, 165, Koen-cho, Kitami, Hokkaido 090-8507, Japan Dep. of Civil Eng. Kitami Institute of Technol. 165 Koen-cho Hokkaido 090-8507 Japan

WT5”BZ]In this study, by considering the scale ratio related to the specific gravity of the submerged bed material, and introducing a degree of distortion, n the similarity laws for a distorted river model with a movable bed were derived under the conditions that the values of dual dimensionless parameters in a regime-criterion diagram for the bars are the same in a model as they are in a prototype, and that a resistance law such as the Manning-Strickler-type formula is to be valid for a model and a prototype. The usefulness of the similarity laws derived in this study was verified by comparing the bed forms from the distroted model experiments with the bed forms from the 1/50-scale undistorted model experiments, which were performed by the Hokkaido Development Bureau (H. D. B.), Japan, to examine the tentative plan for the improvement of a low-flow channel in the Chubetsu River, which is a tributary of the Ishikari River. It is considered that the distorted model experiments to be valid with either sand or lightweight bed material. [WT5”HZ]

关键词： similarity law regime-criterion diagram distorted model lightweight bed material alternate bars

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