Water Flow Stabilization Using Submerged Weir for Draft Tube Reaction Hydraulic Turbine

Correlation Dimension for Pressure Fluctuation in Hydraulic Turbine Draft Tube

Based on the actual experiment signals of draft tube, the correlation dimension analysis has been carried on using the time domain signals. Through correlation dimension analysis of pressure fluctuating under different load, the results indicate that the pressure fluctuation conditions in draft tube are not same under different load, the corresponding fractal correlation dimensions are also dif...

Numerical Study of a Pipe Extension Effect in Draft Tube on Hydraulic Turbine Performance

Draft tube of Francis type hydraulic turbine usually consists of: cone, elbow and diffuser. On the contrary, in some power stations an extra pipe should be added to the draft tube at the bottom of cone because of installation limitation. In this paper, this special case has been numerically studied. To this end CFD analysis was applied to simulate all parts of hydraulic turbine. A homogeneous m...

CFD Driven Optimization of Hydraulic Turbine Draft Tubes using Surrogate Models

Draft tube designs have to a large extend been based on intuition and on the experience of the design engineer. In a close future, CFD simulations coupled with optimisation algorithms will assist in the search for an optimal technical solution. Such a shape optimisation technique to redesign an existing draft tube is presented in this paper. By this method, a design can be predicted in terms of...

Experiments on hydraulic relations for flow over a compound sharp-crested weir

1 Sinotech Engineering Consultants, LTD. Geotechnical Engineering Department, 12F, 171, Nanking E. Rd. Sec.5, Taipei 10570, Taiwan, Republic of China. 2 Department of Soil and Water Conservation, National Chung Hsing University, 250 Kuo Kuang Rd., Taichung 402, Taiwan, Republic of China. 3 Department of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan 70101, Taiwan, Repub...

THE DISTRIBUTION OF HYDRAULIC EERGY IN WEIR FLOW WITH RELATION TO SPILLWAY DESIGN by