A kind of tapered section vortex generator and its installation method

Abstract

The invention provides a vortex generator with a tapered cross-section, which has a hollow structure with two ends open; The first end is the flow inlet end, and the second end of the vortex generator is the flow outlet end; the cross-sectional area of ​​the vortex generator perpendicular to the centerline is tapered from the first end of the vortex generator to the second end of the vortex generator; The inner and outer profiles smoothly transition from the first end of the vortex generator to the second end of the vortex generator; the center line of the vortex generator is parallel to the flow direction, and its outer profile is fixedly pasted on the profile of the wind turbine blade. The invention also provides a method for installing the vortex generator. The vortex generator of the present invention can increase the lift force of wind power blades and increase the power generation, and is especially suitable for wind fields in low wind speed areas and ground air density areas.

Description

technical field [0001] The invention relates to the field of wind power generation equipment, in particular to a vortex generator with a tapering section. Background technique [0002] Several vortex generators are usually installed on the blades of modern wind turbines to generate high-energy wingtip vortices, suppress flow separation on the upper surface of the airfoil, delay stall, and increase power generation. like figure 1 The common vortex generator structure shown includes two symmetrically distributed fins and a base. The fins are usually perpendicular to the base and form a certain angle with the flow direction. Regarding the shape of the fins, many patents have published different design schemes. The geometric shape of the vortex generator produces a wingtip "vortex" similar to the wingtip of an aircraft in the flow field. The wingtip "vortex" brings the energy of the high-speed fluid outside the boundary layer into the boundary layer through rotation, increasin...

AI Technical Summary

Problems solved by technology

Since the fins of the vortex generator are arranged in a "eight" shape, the drag coefficient of the airfoil will increase, which will affect the overall power enhancement effect of the vortex generator

However, if there is no such included angle, the airflow passes over the fins of the vortex generator in parallel, and the downstream vortex structure induced by the fins is very weak, the disturbance to the wake is very limited, and the effect of suppressing flow separation is not good

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