Abstract
The frequency and the velocity of a wave on water and on a slurry jet surface injected normal to the air stream were measured by a laser beam attenuation technique. Jet fracture frequency was also measured by the laser technique. The wavelength and the amplitude were measured from instantaneous photographs. The behavior of the wave propagating along the jet surface is dominated by the jet injection velocity near the liquid nozzle and is then dominated by the air velocity. The wave velocity increases rapidly at first and then it approaches the constant determined by the air velocity. The wave frequency is constant along the liquid jet before wave collapse. It is proportional to the injection velocity and is independent of the air velocity. The constant wave frequency is about one -fifth of the jet fraction frequency. The differences in the wave characteristics between water jet and slurry jet are small.
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