阶梯式转子旋转盘反应器空腔区域内流体特性分析

Analysis of fluid characteristics in the cavity zone of the stepped-rotor spinning disc reactor

摘要

采用可视化观测技术与非线性拟合方法，分析旋转盘反应器空腔流体行为特征。选用水、甘油、十二烷基苯磺酸钠溶液为实验流体，通过高速摄像机与图像处理软件ImageJ分析空腔区域流体流型与断裂方式，拟合流体流型转变的临界条件方程，探究操作参数对空腔区域特征液滴直径与液滴分布均匀度指数的影响规律。研究发现，流体可呈现液线流、液线-液滴流、液滴流三种流型，断裂方式分为液膜-液滴断裂、液膜-液线-液滴断裂两类；液滴累积体积符合R-R分布，特征液滴直径为1～4mm，液滴分布均匀度指数为2～8；转子转速与流体黏度对流体行为特征具有显著影响。研究结果有助于深入理解超重力设备内部流体行为特征，可为构建传质模型提供基础数据与理论参考。

Abstract

Visual observation technology and nonlinear fitting method were adopted to analyze the fluid behavior characteristics in the cavity of the rotating disk reactor. Water, glycerol and sodium dodecylbenzenesulfonate solution were selected as working fluids. A high-speed camera and ImageJ image processing software were used to investigate the flow patterns and breakup modes of fluid in the cavity. The critical condition equation for flow pattern transition was fitted, and the influence laws of operating parameters on the characteristic droplet diameter and droplet distribution uniformity index were explored. Results show that the typical flow patterns include ligament flow, ligament-droplet flow, and droplet flow. Meanwhile, the breakup mechanisms consist of film-to-droplet and film-to-ligament-to-droplet transitions. The cumulative droplet volume follow the Rosin-Rammler (R-R) distribution, with characteristic droplet diameters ranging from 1 to 4 mm, and the droplet distribution uniformity index between 2 and 8. Rotor speed and fluid viscosity significantly influence on the fluid behavior characteristics in the cavity zone. The findings contribute to a deeper understanding of the internal fluid behavior characteristics of supergravity devices and can provide basic data and theoretical references for constructing mass transfer models.

关键词

超重力 / 流体行为 / 空腔区域 / 流型转变 / 液滴尺寸分布

Key words

high-gravity / fluid behavior / cavity zone / flow pattern transition / droplet size distribution

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基金资助

国家自然科学基金面上项目(52171344)

国家自然科学基金面上项目(52271302)

辽宁省科技计划联合计划(2025110278-JH2/1018)

中央高校基本科研业务费专项资金项目(3132023512)