Droplets formation and diffusion simulation and test of microporous atomizer for robotic immunization spraying

Area of Science:

• Agricultural Engineering
• Fluid Dynamics
• Robotics

Background:

• Precision spraying is crucial for efficient poultry house immunization.
• Existing methods may lack uniformity and efficiency in reagent atomization.
• Robotic applications demand reliable and accurate spraying systems.

Purpose of the Study:

• To design and evaluate a microporous atomization sprayer for poultry house immunization robots.
• To ensure uniform and efficient atomization of immunological reagents.
• To analyze droplet diffusion and particle size distribution for optimal spraying.

Main Methods:

• Modal analysis of a piezoelectric atomization plate to determine optimal driving frequency (113 kHz).
• Simulation of single-pore droplet formation using a resonant frequency-driven droplet generation model.
• Application of droplet diffusion and evolution models to analyze atomization field characteristics.

Main Results:

• Simulated stable atomization diffusion distance of 68.36 cm with a 32° diffusion range.
• Over 90% of droplets within 15-55 cm have a particle size of 30-200 μm.
• Experimental validation showed a diffusion angle of ~30° and distance of 65 cm, with simulation errors < 18%.

Conclusions:

• The designed microporous atomization sprayer meets poultry immunization robotic spraying requirements.
• The system demonstrates effective and uniform atomization with controlled droplet size and diffusion.
• Simulation models accurately predict atomization field behavior and droplet characteristics.