Atomization of Liquids by means of a Rotating Nozzle : 1st Report, Experimental Analysis of the Mechanism of Atomization

Abstract

The degree of atomization of a liquid jet issuing from a rotating nozzle is improved by centrifugal force and air forces laterally acting on it. This method, therefore, may be applicable not only to the oil burner in a gas-turbine or a boiler furnace, but also to various atomizing devices in chemical industry. In this paper, mechanisms of atomization were analysed by using the strobo-flush-photography. Fig. 3 shows the most typical forms of jets with the speed of rotation gradually increased : (a) is dripping, (b)∼(d) are smooth jets, (e) and (f) are wavy jets, (h) and (i) are partially sprayed jets and (k) is spray. Although these types are, at a glance, like those ejected from a fixed nozzle, many differences can be found in close observation. For instance, Fig. 4 shows the generation of uniform drops from a tip of the regularly waved jet and Fig. 8 shows the longitudinal disruption of a liquid column into two parts between which a very thin film is formed.