Laser light-scattering and imaging probes plus a flash photography system were used to count and measure droplets from a multiple-jet, nozzle-in-boom system with the jets facing downstream in an airflow. Tests were done in a laminar flow wind tunnel. The method of incorporating data from these different measuring systems is explained. The droplet diameter range measured was from 0.5 to 3600 μm. Tests cover air speeds ranging from 11 to 54 m/s, fluid flows from 1.8 to 8.8 L/min per nozzle, for 10-to 30-jet arrays per nozzle with jet inside diameters (ID) from 0.76 to 1.8 mm.
A correlation obtained for the volume median diameters from 14 tests shows good agreement with experimental data, for the single fluid studied: