Zweistoffzerstäuben von Suspensionen (English shop)

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Twin-Fluid Atomization of Suspensions
Atomizing suspensions or slurries is technically accomplished using internal
mixing twin-fluid atomizers. The advantages of their application are low
atomization pressures, good partial load conditions and a small risk of blocking
the nozzle. The critical flow consisting of a mixture of liquid gas and solids exits
the atomizer and disintegrates into small droplets forming the spray. The high
amount of generated specific surface is used for the heat- and mass transfer.
In this work, the dependencies of the spray characteristics on the critical flow
inside the atomizer are experimentally investigated. For the system of water, air
and glass spheres the mass flow, the exit velocity, the pressure and the flow-
pattern in the exit cross-section of the atomizer are measured. The volumetric
composition of the flow is varied. The dependencies of the locally measured drop
sizes and velocities on the flow conditions inside the atomizer are investigated.
Analytical and semi-empirical models are introduced to predict the flow
velocities inside the atomizer as well as the drop velocities and the drop sizes in
the spray.