Simulation method of hydrodynamic influence of tidal current energy turbine array based on dynamic generalization

Abstract

The invention provides a method for simulating a value of a hydrodynamic effect of a tidal current energy turbine array on the basis of dynamic generalization. According to a characteristic that a turbine has different running states under different water flow velocities, when the water flow velocity is greater than a cut-in flow velocity and smaller than a cut-out flow velocity, a corresponding value of a drag coefficient is obtained by fitting a drag force discrete value provided by a turbine type, so that the obvious defect that the drag coefficient in a conventional tidal current dynamic model is kept as a constant is made up, and not only influence of form drag of a turbine generating set is considered, but also influence of a drag force (energy loss) generated by energy extraction when the turbine operates to generate electricity on a flow field is considered, thereby more accurately evaluating the hydrodynamic effect of the tidal current energy turbine array on a surrounding sea area. The method has the Important significance for reasonable development and utilization of tidal current energy.

Description

technical field [0001] The invention relates to the field of ocean energy development and utilization, in particular to a numerical simulation method for the hydrodynamic influence of tidal current energy turbine arrays. Background technique [0002] Ocean energy is different from conventional fossil energy. It can use the ocean to extract energy and generate electricity without generating waste gas and waste heat, and does not pollute the ecological environment. Among them, tidal current energy has attracted more and more attention because of its advantages such as high prediction accuracy, good continuous energy supply, large reserves and energy flow density, and its wide distribution range has become an important part of ocean energy development and utilization. Reasonable development of tidal current energy is an important means to solve the shortage of resources in coastal areas, and it is of great significance to promote the sustainable development of my country's econ...

AI Technical Summary

Problems solved by technology

In actual situations, when the turbine operates to generate power under the current drive, the blade rotation extracts the tidal current energy to generate an additional drag force (energy loss) on the flow field, that is, the drag force item will change with the tidal flow velocity at the location of the turbine. , it can be seen that the static generalized numerical simulation of the hydrodynamic influence of the turbine array ignores the drag force generated by the operation of the turbines to generate electricity

Therefore, this static hydro turbine generalized simulation method is an imprecise approximation method, which does not conform to the actual situation of the influence of the hydro turbine array on the surrounding flow field

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