旋转齿筒式水力空化器内空化过程

The Cavitation Process in Rotating Toothed Cylindrical Hydrodynamic Cavitator

在液体的空化过程中,空化泡的溃灭瞬间会在局部产生巨大的能量,可打破物质间的强力结合,甚至可以打断大分子主链上的碳键或破坏微生物细胞壁,在工程具有广泛应用。运用ANSYS Fluent 19.0,对一种旋转齿筒式水力空化器中的空化过程进行数值模拟研究与改进,得到不同齿型空化器内部的压力云图、速度云图、空化泡分布云图等数据及空化器内空化过程的一般规律。结果表明,该空化现象是转筒旋转作用下的离心力和静筒上齿的节流剪切力共同作用的结果;方形齿的空化率高于圆形齿;空化主要发生在转筒盲孔底部,分布均匀,空化强度高,累积空化体积大。

During the cavitation of the liquid,the collapse of the cavitation bubble would produce a local huge energy,which could break the strong bond between the substances,and even interrupt the carbon bond on the main chain of the macromolecule or destroy the microbial cell wall.It had a wide range of applications in engineering.Using ANSYS Fluent 19.0,the numerical simulation and improvement of the cavitation process in a rotating toothed hydrodynamic cavitation were carried out,and the pressure cloud,velocity cloud and cavitation bubble distribution in different toothed cavitation were obtained.The general law of cavitation process in the cavitation was obtained.The results showed that the cavitation phenomenon was the result of the combined action of the centrifugal force under the rotation of the drum and the throttling sheer force of the teeth on the static cylinder;The cavitation rate of the square teeth was higher than that of the circular teeth;The cavitation mainly occurs in the rotating drum,and the distribution was uniform;The cavitation intensity was high,and the cumulative cavitation volume was large.