Tracer particle release apparatus

Abstract

The invention relates to a tracer particle release apparatus of surface flow velocity field measurement and belongs to the hydraulic measurement field. The apparatus comprises a bearing support formed by a framework and a screw, a V-shaped storage box, a rotating shaft and a power system, wherein tracer particles are placed in the V-shaped storage box and a lower end of the box is open. The bearing support and the V-shaped storage box are connected through the screw so as to adjust a height of the V-shaped storage box. The screw is fixedly welded with the V-shaped storage box. The rotating shaft is arranged at an exit of a lower end of the storage box. The power system drives the rotating shaft to rotates so as to realize that the tracer particles fall into a fluid from the exit of the lower end of the V-shaped storage box. The apparatus can be applied to tests of a river model, image velocity measurement and the like. The tracer particles are released high-efficiently and uniformly and surface flow field structures of stream flow with different scales are researched.

Description

technical field [0001] The invention belongs to the field of water conservancy measurement, in particular to a tracer particle delivery device. Background technique [0002] Large-scale image velocimetry (PIV) and particle tracking velocimetry (PTV) are widely used in indoor river engineering model tests and field river surface flow field measurements. The measurement of the surface flow field is of great significance for the study of the basic theory of hydraulics and river dynamics, the accurate calculation of river flow and the evaluation of the safety of wading structures such as port bridges. [0003] The above-mentioned system needs to drop tracer particles on the surface of the water body in order to obtain more accurate flow field measurement effect when the water surface texture is not clear or there are few natural floating objects. Common water surface tracer particles are flat and convex plastic round particles, ranging in size from millimeters to centimeters, w...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of uneven delivery of tracer particles when using a large-scale image velocity measurement system for model tests, and proposes a tracer particle delivery device, which adopts a V-shaped storage box and a striped surface. Under the combing of the brush, the strip-shaped groove in the storage box is just loaded with a layer of tracer particles; the shaft rotates under the drive of the motor, and the strip-shaped groove containing the tracer particles rotates After the angle of a bar groove, the tracer particles fall freely to the surface of the water

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