Numerical simulation of flow field characteristics of pressure controllable pipe with microporous walls
KAN Biao1,2,3*, GAO Yun1, XU Shengsong1, DING Jianning1,2,4
1. School of Mechanical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China; 2. Center for Low-Dimensional Materials, Micro-Nano Devices and Systems, Changzhou University, Changzhou, Jiangsu 213164, China; 3. Changzhou High Technology Research Key Laboratory of Mould Advanced Manufacturing, Changzhou, Jiangsu 213164, China; 4. Center for Micro/Nano Science and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：Aiming to reduce the energy loss of fluent induced by the resistance of pipes and accelerate the flow rate, a model of pressure controllable pipe withmicroporous walls is promoted. The air in the micropore provided boundary constraint for the flow and helped to reduce the resistance. The effect of flow rate acceleration could be modulated by controlling the pressure of the air in the micropore. Based on the numerical simulation, the flow field characteristics and the efficiency of flow rate acceleration were calculated. The results showed that the flow rate was increased by 2%-6% compared with the cases in straight pipes, and the maximum value was over 12%. The acceleration was achieved when the input pressure of liquid was low. Flow acceleration was strengthened before it was weakened with the increase of gas pressure. The modulation of flow rate by gas pressure was limited for the liquid phase of high pressure. Flow rate accelerations were observed when the meniscus at the micropore was in symmetric shape with small curvature. However, the most prominent acceleration of the flow rate could be observed even when the meniscus was in asymmetric shape. By comparing the patterns of liquid-gas interface, the conditions for steady interface and flow rate acceleration were analyzed.
坎标,*,高运,徐盛松,丁建宁. 主动调压型微孔壁管道流场特性数值仿真[J]. 排灌机械工程学报, 2020, 38(2): 183-187.
KAN Biao,*,GAO Yun,XU Shengsong,DING Jianning,. Numerical simulation of flow field characteristics of pressure controllable pipe with microporous walls. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(2): 183-187.
