孔口直径对溶气释放器气泡生成规律的影响  

Effect of orifice diameter on bubble formation in dissolved gas release

作　　者：梅升继 邢普[1] 李鳌 Mei Sheng-ji;Xing Pu;Li Ao(School of Aerospace Manufacturing Engineering,Nanchang Hankong University,Nanchang 30063)

机构地区：[1]南昌航空大学航空制造工程学院,南昌330063

出　　处：《南昌航空大学学报（自然科学版）》2022年第4期36-42,共7页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：江西省重点研发计划(20202BBF63010)。

摘　　要：为了更好地提高气浮效率,本文在基于压力溶气气浮法对TS型溶气释放器的工作原理进行分析的基础上,采用CFD流体模拟分析并结合压力溶气法微气泡生成实验平台,分析了释放器孔口直径对气泡生成特性的影响。通过模拟分析与试验结果发现,同一溶气压力下,随着孔口直径增大,释放器内部的速度梯度值及最大湍流动能减小,释放后气浮过程中生成气泡直径呈现先减小后增大的变化规律。因此选择合适的释放器孔口直径是十分必要的。In order to better improve the air flotation efficiency, the influence of orifice diameter of releaser on bubble generation was investigated based on the working principle of TS type dissolved gas releaser on the ground of pressure dissolved gas floatation method, using CFD fluid simulation analysis and combined with pressure dissolved gas method microbubble generation experiment platform. According to the simulation analysis and test results, under the same dissolved gas pressure, the velocity gradient and the maximum turbulence kinetic energy inside the release device decrease with increased orifice diameter. After the release, the bubble diameter formed in the process of air floating presents a change law of first decreasing and then increasing. Therefore, it is necessary to select appropriate diameter of the release nozzle.

关 键 词：气泡 TS型溶气释放器 CFD流体模拟 压力溶气气浮法 

分 类 号：U458[建筑科学—桥梁与隧道工程]