The breakup process of liquid sheet formed by two axisymmetric opposed jets was experimentally studied with a high-speed camera. The breakup process

the generation and propagation process of surface wave of liquid sheet were analyzed. The influences of jet diameter

nozzle separation and jet Weber number on the breakup of liquid sheet were investigated. The frequency variation of surface wave and the size distribution of sheet disintegration were quantitatively analyzed. The propagation frequency of surface wave increased with increasing We

but decreased along the radial direction. The droplet shedding frequency of sheet edge increased with increasing We. At We>1000

a large number of droplet dots appeared at surface of liquid sheet

which promoted the breakup of liquid sheet. The non-dimensional drop size disintegrated from liquid sheet was mainly in the range of 0-1.