Test equipment for research of fog drop drift, and processing method for test equipment

Abstract

The invention discloses test equipment for the research of fog drop drift, and a processing method for the test equipment. The equipment comprises a dragging guide rail, a sliding block arranged on the dragging guide rail, a trailing vortex generation device hooked at the sliding block, a fog drop generation device hooked at the sliding block, a motor connected with the sliding block, and a PIV system. The sliding block slides along the dragging guide rails at a preset speed under the action of the pulling force generated by the motor, drives the trailing vortex generation device to generate trailing vortex comprising tracer particles and drives the fog drop generation device to generate fog drops. The equipment also comprises the PIV system which is used for capturing the motion images of the trailing vortex and fog drops in a fixed extending plane, carries out the processing of the motion images, and obtains the change laws of the fog drop drift and trailing vortex movement with time. The equipment can analyze and obtain the correlation of the fog drop drift and trailing vortex movement through simulating the trailing vortex movement and the fog drop drift under the real conditions, and provides theoretical guide for the research of the fog drop drift in a process of aviation drug application.

Description

technical field [0001] The invention relates to the field of test equipment, in particular to a test device for studying droplet drift and a processing method for the device. Background technique [0002] With the development of modern precision agricultural technology, aerial plant protection technology has been widely used in the field of agriculture. At present, there are about 30,000 agricultural and forestry aircrafts in the world, with an annual operating area of ​​100 million hectares, accounting for 17% of the total arable land area. As a sunrise industry, agricultural aviation plant protection has huge development space and broad market prospects. The plant protection operation of fixed-wing aircraft has the characteristics of fast speed, large spray width, large amount of drug load, long flight time, and less terrain restrictions. Compared with traditional manual and semi-mechanized plant protection operations, its economic benefits are very significant. However,...

AI Technical Summary

Problems solved by technology

However, at present, wind tunnel experiments mostly focus on the problem of droplet drift generated by a single nozzle, and cannot simulate the wake vortex movement of fixed-wing aircraft. The experimental methods used are similar to field experiments, and the instantaneous droplet movement law cannot be obtained.

[0005] In general, the existing methods for studying the drift of droplets in the spraying process of fixed-wing aircraft all have the shortcomings of being difficult to simulate the real flight wake vortex flow field and insufficient research on the law of droplet motion, and most of the cases are simply carried out. It is difficult to understand the problem of droplet drift from the flow field and the movement mechanism of the droplet itself in the statistics of the droplet volume at a fixed position in space

Therefore, it is impossible to provide a spray optimization method with a control model in production, and it is impossible to deeply grasp the correlation between the flow field and droplet motion in scientific research

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