Abstract
The article presents the developed mathematical models that describe the process of spraying the working body of a low-volume sprayer. Theoretical studies show that with an increase in the supply of working fluid to the atomizing disc, the rotational speed of the pneumatic disc atomizer decreases, and in order to ensure the effect of the air flow on the droplet formation process, the radius of the disc should be larger than the radius of the base of the cone-shaped fairing, but less than its maximum critical value and for obtaining a monodisperse spray with the main droplet diameter d = 80 … 120 μm, at an axial air flow velocity of the fan installation U = 40 … 60 m/s, the parameters of the disk the sprayer and the propeller are linked together when the following values: disk radius r = 65 … 85 mm, the number of radial channels on the disk nр = 2 … 6 pcs, the width of the radial channel bр = 3 … 4 mm, and to obtain a high-quality air-droplet flow, the initial velocity of the main drops discharged from the periphery of the spraying disc must be less than the speed of the air flow and, at the same time, the rotational speed of the pneumatic disc sprayer is recommended to be used in the range of ω = 60… 200 s-1.
Highlights
Cotton is the main and most valuable technical crop cultivated on the territory of the Republic of Uzbekistan [1,2,3]
2 Materials and Methods The analytical study of the process of spraying fluid rotating spray driven by the air flow used in the theory of rotating nozzles and wind turbines, based on which analytical dependencies that determine the optimal monodisperse droplet sizes depending on the radius of the nozzle, the specific flow of the fluid, the frequency of the rotating disk atomizer and other factors [6,7,8,9,10,11,12,13]
Substituting the value t in the expression (13), we find the frequency ω of rotation of the disk sprayer as a function of the air flow velocity U and the specific flow rate q of the liquid: ωω ρρжqq 2ωω (φφ ρρв ξξ √φφ2+1+llnn(φφ+ √φφ2+1))
Summary
Cotton is the main and most valuable technical crop cultivated on the territory of the Republic of Uzbekistan [1,2,3].The most labor-intensive and technically complex operation in the cultivation of cotton is harvesting, so the mandatory and most important condition for the preparation of cotton crops for productive and high-quality work of cotton harvesters is the artificial removal of cotton leaves by carrying out pre-harvest defoliation [4].Among the many known methods of treating plants with pesticides (pollination, spraying, fumigation, aerosols, etc.), the most effective in the economic, agrotechnical and environmental aspects is spraying, through which about 75% of the work volume is performed [5]. Cotton is the main and most valuable technical crop cultivated on the territory of the Republic of Uzbekistan [1,2,3]. The most labor-intensive and technically complex operation in the cultivation of cotton is harvesting, so the mandatory and most important condition for the preparation of cotton crops for productive and high-quality work of cotton harvesters is the artificial removal of cotton leaves by carrying out pre-harvest defoliation [4]. Creating a high-performance sprayer that meets the requirements of low-volume spraying of cotton is an urgent task. The purpose of the study is to study the process of liquid spraying by a smooth rotating disk with a coaxially lateral air flow to create a working body and a technological scheme for a low-volume method of spraying cotton
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
