Substantiation of the design and technological parameters of a multi-fan sprayer module

Abstract

Currently, precision gardening necessitates the use of robotic universal platforms featuring modular multi-fan sprayers, typically equipped with 4-6 fans. As new technologies emerge, the demands placed on spraying ventilation systems are also evolving. (Research purpose) The objective of this research is to establish the design and technological specifications of the multi-fan sprayer module. (Materials and methods) The research is grounded on fundamental equations of energy and mass conservation in the field of applied gas dynamics, specifically the Bernoulli equation and the flow continuity equation. To analyze the pressure distribution within the fan duct and calculate the gas jet, a specific methodology was employed in this research. Additionally, the research utilizes analytical expressions and industry standards to determine universal parameters and dimensions of fans and liquid atomizers. (Results and discussion) Theoretical calculations were performed to determine the main parameters. The results are as follows: the air consumption required to cover a given crown volume is 11.28 cubic meters per second; the air consumption by one fan is 1.88 cubic meters per second; the air flow rate at the fan outlet reaches 17.9 meters per second; pressure generated by the fan is 192.25 pascals; power required to drive one fan is 0.170 kilowatts; the installed power of the fan motor is 0.204 kilowatts; the jet initial section length is 1.53 meters; the axial jet velocity is 13.6 meters per second; the air consumption is 12.84 cubic meters per second; the round jet diameter is 1.58 meters. (Conclusions) The technological scheme of a multi-fan sprayer has been developed and justified. Calculation equations have been proposed to determine the distribution of static, dynamic, and total pressure in different sections of the sprayer fan.  An algorithm for calculating the parameters of the sprayer module has been presented. The numerical values of the parameters for the multi-fan sprayer module have been determined for specific operating conditions.