Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Computational modeling on slug flow phenomenon in inverted siphon and improving its performance
ZAMM - Journal of Applied Mathematics and Mechanics ( IF 2.3 ) Pub Date : 2021-01-18 , DOI: 10.1002/zamm.201900308 Behrouz Aghebatie 1 , Khosrow Hosseini 1
ZAMM - Journal of Applied Mathematics and Mechanics ( IF 2.3 ) Pub Date : 2021-01-18 , DOI: 10.1002/zamm.201900308 Behrouz Aghebatie 1 , Khosrow Hosseini 1
Affiliation
|
Slug flow is one of the flow patterns that occur in transmission systems containing two‐phase flow. Large air bubbles trapped in these systems block the flow and expose the structure to undesirable pressures and sharp fluctuations. In this research, numerical modeling has been performed using CFD technique in OpenFOAM software by InterFoam solver. Pressure fluctuations and their magnitude induced by slug flow in inverted siphon have destructive effects on the structure life. Combining the loads exerted by the pressure fluctuations induced on the structures with other loads may exceed the bearing loads of structure. In the inverted siphon, placing the ribs to reduce the damages exerted by slug flow were investigated. Different placements of ribs with different heights on the sloping parts of inverted siphon were modeled numerically. Study of flow characteristics showed that d/Hc ratio (d and Hc represent the rib height and duct height, respectively) can greatly balance the negative pressures and also improve the average pressures in the structure. The results showed that the use of ribs, the probability of forming slugs with pressure drop and severe fluctuations decreased and the maximum and minimum pressures improved about 25% and 20%, respectively.
中文翻译：
倒虹吸段塞流现象的计算模型及其性能改进
塞流是包含两相流的传输系统中发生的一种流型。这些系统中截留的大气泡会阻塞气流，并使结构暴露于不良压力和剧烈波动中。在这项研究中，通过InterFoam求解器在OpenFOAM软件中使用CFD技术进行了数值建模。倒虹吸段塞流引起的压力波动及其幅度对结构寿命具有破坏性影响。由在结构上引起的压力波动施加的负载与其他负载相结合可能会超过结构的轴承负载。在倒虹吸管中，研究了放置肋骨以减少弹塞流所造成的破坏。数值模拟了倒虹吸管倾斜部分上不同高度的肋骨的不同位置。d / H c比（d和H c分别代表肋骨高度和风道高度）可以极大地平衡负压，也可以提高结构中的平均压力。结果表明，肋的使用，形成带压降的块的可能性和严重的波动降低了，最大和最小压力分别提高了约25％和20％。
更新日期：2021-02-09
中文翻译：
倒虹吸段塞流现象的计算模型及其性能改进
塞流是包含两相流的传输系统中发生的一种流型。这些系统中截留的大气泡会阻塞气流，并使结构暴露于不良压力和剧烈波动中。在这项研究中，通过InterFoam求解器在OpenFOAM软件中使用CFD技术进行了数值建模。倒虹吸段塞流引起的压力波动及其幅度对结构寿命具有破坏性影响。由在结构上引起的压力波动施加的负载与其他负载相结合可能会超过结构的轴承负载。在倒虹吸管中，研究了放置肋骨以减少弹塞流所造成的破坏。数值模拟了倒虹吸管倾斜部分上不同高度的肋骨的不同位置。d / H c比（d和H c分别代表肋骨高度和风道高度）可以极大地平衡负压，也可以提高结构中的平均压力。结果表明，肋的使用，形成带压降的块的可能性和严重的波动降低了，最大和最小压力分别提高了约25％和20％。
京公网安备 11010802027423号