An experimental study of the jet evolution of boiling water and ethanol with an increase of superheat level in the flow for a number of flow swirl speeds has been made. The degree of influence of the rotational speed at various degrees of superheat (low, high and attainable one) on atomization has been revealed. A decisive role has been established in the spraying of high-intensity swirls under conditions of low superheats. At high and attainable superheats, the effect of intense boiling on atomization becomes decisive. A complete jet breakup, which is observed in the absence and at low rotational speeds, does not occur under conditions of high-intensity swirl. 1/f fluctuations have been detected in the precessing jet at low superheats of the liquids.
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