非牛顿流体射流雾化特性研究进展

本文总结了有关非牛顿流体射流雾化特性的研究进展。首先，阐述了预测非牛顿液体射流初次雾化失稳特性的理论方法，介绍了有关非牛顿流体射流初次雾化的实验现象和特性参数。当射流初次雾化的过程结束后，破碎产生的液滴会在高速气流中发生二次雾化。随后，总结了国内外有关非牛顿流体液滴二次雾化实验研究的相关进展。分析了液滴二次雾化的实验现象，总结了不同种类液滴二次雾化过程中所研究特性参数，如破碎模态、临界韦伯数和初始变形时间等随来流气体参数之间的关系，并介绍了基于液滴二次雾化物理过程所建立的预测喷雾场液滴平均粒径的雾化模型。最后，基于目前的研究现状，给出了非牛顿液体射流初次雾化和二次雾化实验研究的后续重点研究方向及建议。

Research progress in atomization characteristics of non-Newtonian fluid jet

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.