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Abstract: This paper summarizes the research progress in atomization characteristics of the non-Newtonian liquid jet. The theoretical method predicting the breakup features of the primary atomization of non-Newtonian jets is first illustrated, and the experimental observation and properties introduced. At the end of the primary atomization of non-Newtonian jets, the generated droplets would go through the secondary atomization in the high speed gaseous flow. Therefore, the experimental research progress, both domestically and abroad, in the secondary atomization of droplets is reviewed. The experimental results of non-Newtonian droplets are then compared, followed by the summary of the effects of incoming gaseous flow parameters on the key characteristics in the secondary atomization processes such as the breakup mode, critical Weber number and initial deformation time. In addition, the atomization model which is based on the breakup physical processes of droplets and can predict the average droplet diameter in the spray field is introduced. Finally, suggestions for the future key research fields of the primary and secondary atomization of non-Newtonian jets are provided based on the present research status.

Key words: primary atomization, secondary atomization, atomization model, non-Newtonian fluid, liquid jets