为进行微通道气液两相流动及传热研究, 建立了T型微通道模型, 利用VOF方法进行数值模拟, 对弹状流流型进行了数值分析, 考察了弹状流的形成过程、速度、表面张力和粘度对弹状流流型的影响, 计算了气泡速度和液膜厚度, 并与经验关联式进行比较.结果表明:液体粘度对弹状流的影响较大;而表面张力对弹状流几乎没有影响, 当气速一定时, 液速越大, 气泡的长度越小而液柱的长度越大.气泡速度和液膜厚度与经验关联式的计算结果误差分别为2.57％和4.87％.%For microchannel gas liquid two phase flow and heat transfer research, T-shaped microchannel model was established, using the VOF method for numerical simulation of the slug flow flow pattern for the numerical analysis, the formation process of slug flow, slug flow velocity, surface tension and viscosity of flow pattern, the influence of velocity of the Taylor bubble and liquid film thickness was calculated, and compared with empirical equations. The results show that the viscosity of liquid has great influence on the elastic flow. However, the surface tension has little effect on the elastic flow. When the air speed is certain, the liquid velocity is higher and the length of the bubble is smaller and the length of the column is larger. The calculation results of bubble speed and liquid film thickness and empirical correlation were 2. 57％ and 4. 87％ respectively.
展开▼
