Abstract
Motion model for describing the quantity of air in droplets through changing the structure of air induction nozzle
Highlights
Air induction nozzles, generating negative pressure resulting to intake air when the high velocity fluid cross the Venturi tube and forming bubbly two-phase flow in a small space contributing to the atomization, are one key part to reduce drift potential 1, so they can improve utilization of pesticides significantly 2-4
3.1 Effects of throat and orifice size on flow rate When testing separate Venturi tube and flat fan nozzle under the same pressure with water, flow rate was proportional to crosssectional area in Figure 2a, agreeing with the Bernoulli equation
In order to study the effect of single variable of air induction nozzles structure on pesticide atomization, Turbo Drop Venturi tube and conventional flat fan nozzle were assembled to investigate property of atomization
Summary
Air induction nozzles, generating negative pressure resulting to intake air when the high velocity fluid cross the Venturi tube and forming bubbly two-phase flow in a small space contributing to the atomization, are one key part to reduce drift potential 1 , so they can improve utilization of pesticides significantly 2-4. Its characteristics reflect on droplet size and velocity, structure of spraying sheet, structure of droplet and so on 6-13 These studies supplied a great deal of theoretical basis for controlling droplet parameters and could interpret the relationship between characteristics of droplet and liquid drift and deposition at a certain extent. Content of air in droplet produced by air induction nozzles was especially studied to understand how design parameters affect spray characteristics and its anti-drift performance. It is difficult to explain nozzles performance by changing single variable due to their fixed Venturi tube’s diameter and orifice size of integration nozzles
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