| 李永胜， 王治云， 杨茉.横向水流作用下气泡运动数值模拟[J].轻工机械,2018,36(5):29-33 |
| 横向水流作用下气泡运动数值模拟 |
| Numerical Simulation of Bubble Movement under Action of Transverse Flow |
| |
| DOI：10.3969/j.issn.1005 2895.2018.05.006 |
| 中文关键词: 管道 VOF模型 气液两相流 气泡粒径 PISO算法 |
| 英文关键词:pipeline VOF（volume of fluid） model gas liquid two phase flow bubble particle size PISO（pressure implicit split operator）
algorithm |
| 基金项目:国家自然科学基金（51306121） |
|
| 摘要点击次数: 1289 |
| 全文下载次数: 1668 |
| 中文摘要: |
| 由于气液两相体系中气泡的诸多流体力学行为不仅影响两相流的速度分布，还可通过改变气液相界面等途径改变整个体系的传热传质
效果，对气液接触设备性能具有重要影响。课题组利用数值模拟对恒定水速下管道中喷射的气体进行分析，追踪管道中气泡流的变化情况。气液两相流采用层流
模型，并运用VOF对气液两相界面进行追踪，速度与压力的耦合求解采用PISO算法。计算结果表明：气体在管道中成类似泡状流，并受浮力作用逐步靠近上壁面
形成连续的长气泡；水流速度和气泡到达上壁面距离进口处的距离近似呈线性关系；最大气泡粒径与进口水速负相关，与进口气速正相关。研究结果可为相关气
泡运动特性的进一步研究提供参考。 |
| 英文摘要: |
| Many hydrodynamic behaviors of bubbles in gas liquid two phase system not only affect the velocity distribution of two phase flow, but also
change the heat and mass transfer effects of the whole system by changing the gas liquid interface, which has an important influence on the performance of gas liquid contact equipment.
Therefore, numerical simulation was used to analyze the injected gas in a pipe at constant water velocity, and the change of the bubble flow in the pipe after gas injection was tracked. The
laminar flow model was adopted for the gas liquid two phase flow, VOF model was used to track the gas liquid two phase interface, and the PISO algorithm was used for the
coupled solution of velocity and pressure. The calculation results show that the gas forms a bubble like flow in the pipe and is gradually close to the upper wall due to the buoyancy to
form continuous long bubbles. There is a linear relationship between the velocity of the water flow and the distance from the air bubble to the upper wall surface at the entrance.The
maximum bubble size is negatively related to the inlet water speed and positively related to the inlet gas velocity. This study can provide reference for the further research on the relevant
bubble motion characteristics. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
