Six-operating-condition bidirectional tide power generation water turbine

Abstract

The invention belongs to the technical field of fluid machinery and engineering devices, and in particular relates to a six-operating-condition bidirectional tide bulb through-flow water turbine by adopting the brand new guide vane molded line and revolving wheel blade thickness regularity of distribution. The turbine comprises a water inlet pipe, a bulb head, a tubular seat, a guide vane, a revolving wheel and an exhaust tube; the shape of the guide vane is designed, and a brand new molded line is adopted, thus the flow is more smooth, and the resistance loss in a flow channel is less; the revolving wheel blade is designed, an S-shaped revolving wheel blade is adopted, a new thickness changing discipline is adopted from the inlet to the outlet, and higher efficiency of the operation of the forward and backward bidirectional water turbine is ensured; and compared with the general tide machine set, the turbine provided by the invention has the advantages that the efficiency of the forward and backward bidirectional water turbine is improved, the vibration and pressure pulsation are reduced, the revolving wheel machinery strength is increased, and the dynamic stress of the revolvingwheel blade is reduced, thus the occurrence of cracking probability of the revolving wheel blade is greatly reduced, and the operation stability of the water turbine is improved.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and engineering equipment, and in particular relates to a six-working-condition two-way tidal bulb tubular water turbine adopting a new guide vane profile and runner blade thickness distribution rules. Background technique [0002] The tidal power stations that have been built and rebuilt at home and abroad mainly use bulb tubular units. Similar to other water turbine units, the performance of tidal power generation units depends largely on the internal flow conditions and the dynamic characteristics of the unit. In hydraulic design research, the flow field analysis of hydraulic turbines mainly relies on CFD calculations and model tests. After decades of research and development, the hydraulic performance and unsteady flow characteristics can be predicted more accurately, and more flow studies have been carried out. Induced dynamics studies. [0003] The operating conditions of the new b...

AI Technical Summary

Problems solved by technology

Due to the two-way operation of tidal units, it is required to have high efficiency in both the forward and reverse turbine working conditions. The traditional hydraulic design method can only guarantee the efficiency of the one-way turbine working condition, and cannot guarantee the maximum power generation.

In addition, due to the rapid change of water head and large hydraulic fluctuations of tidal units, the operation stability of the unit is poor, the vibration and pressure fluctuation are large, and the dynamic stress of the runner blades is relatively large, which is very easy to cause cracks in the runner blades.

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