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Prediction method for aerial spray drift of helicopter based on model

A prediction method and helicopter technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as no aerial spraying drift model.

Active Publication Date: 2013-02-06
NANJING AGRI MECHANIZATION INST MIN OF AGRI
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Problems solved by technology

As far as the applicant knows, there is no literature related to the drift model of aerial spraying in my country.

Method used

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  • Prediction method for aerial spray drift of helicopter based on model
  • Prediction method for aerial spray drift of helicopter based on model
  • Prediction method for aerial spray drift of helicopter based on model

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Embodiment Construction

[0036] In this embodiment, the length of the airfoil section section of the helicopter is L=1200mm; the chord length of the blade is C=140mm; the installation angle of the blade (at r=0.2m) a min =2.4°, a max =12.1°, the total torque can be adjusted from 0% to 99%, and the total working moment is 50%; the torsion angle of the root section of the airfoil section is 9.05°, and the torsion angle of the wing tip section of the airfoil section is 3.05°.

[0037] The model-based method for predicting the drift of spraying pesticides by helicopter in this embodiment comprises the following steps:

[0038] The first step is to simulate the helicopter—measure the surface parameters of the spraying helicopter fuselage, input them into the computer, perform grid processing, and generate a fuselage grid map.

[0039] In the present embodiment, at first the present invention generates a curved surface to the fuselage of the helicopter measured before the first step is performed, and the s...

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Abstract

The invention relates to a prediction method for aerial spray drift of a helicopter based on a model, belonging to the technical field of agricultural aerial sprays. According to the method, atomization surfaces of an agricultural helicopter and a nozzle are simulated, a to-be-predicted domain and boundary conditions of the to-be-predicteddomain are determined, the Fluent is run so as to obtain a wind field formed on the atomization surfaces after the air flow generated by the movement and a rotor wing of a spraying helicopter is blocked by the main body of the helicopter, and variations of pesticide liquid concentration and pesticide liquid density in each of grids of the to-be-predicted domain in the boundary conditions can be simulated through iterative operation so as to obtain the deposition distribution of the pesticide liquid droplet and predict the aerial spray drift of the helicopter. According to the invention, the CFD (computational fluid dynamics) thoughts are applied to the technical field of the agricultural aerial sprays, and the deposition distribution, the drift range and the like of the pesticide liquid to be aerially sprayed can be quickly and effectively simulated, thereby creating conditions for accurately, safely, conveniently and quickly evaluating the agricultural aerial spray operation.

Description

technical field [0001] The invention relates to a drift prediction method for aerial pesticide application, which belongs to the technical field of agricultural aerial pesticide application. Background technique [0002] Agricultural aviation has made great progress in the last century, and as people pay more and more attention to the ecological environment, since entering this century, they no longer blindly pursue the efficiency of aerial pesticide application, but at the same time consider the safety of aerial pesticide application Sex and environmental pollution, and the pesticide drift of aerial pesticide application is the most prominent problem. [0003] Through the collection of liquid mist droplets, detection of pesticide drift in aerial spraying, and determination of safe spraying zones, environmental pollution and personal safety hazards to non-spraying areas can be effectively avoided during agricultural aerial pesticide spraying. The traditional method is to se...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 薛新宇张宋超孙竹常春梁建秦维彩周立新孔伟周良富蔡晨王宝坤
Owner NANJING AGRI MECHANIZATION INST MIN OF AGRI
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