ID 8

Chargeability of Electrostatic Sprays

 

Abstract:

The chargeability of liquid sprays is an important factor in determining the deposition efficiency of electrostatic pesticide sprays. The Rayleigh limit provides information on the maximum amount of charge a spray drop can carry as a function of droplet size. This paper reviews the literature to determine what fraction of the Rayleigh limit is achievable. Typically less than 10% of the Rayleigh limit charge is obtained. The drop charge per unit mass decreases with increasing drop size and liquid flow rate. A correlation equation is derived from published data to predict spray drop charge from drop size and flow rate.