水平管内气液两相流诱导振动的数值研究

发布时间：2018-04-30 07:39

本文选题：气液两相流 + 诱导振动　；参考：《振动与冲击》2016年16期

【摘要】：利用多场耦合有限元软件ADINA,结合任意拉格朗日-欧拉(ALE)动网格方法,对水平弯管内气液两相流诱导振动问题进行了数值模拟研究;重点考察了管结构振动响应特性及流型、体积含气率β和分相折算速度等对激振力的影响。计算结果表明:管结构动态响应表现为低频带内随机振动和周期性振动的混合,响应主频随分相折算速度的增加而逐渐增大。脉动激振力均方根值FRMS在环状流时最大,长泡状流时最小;β在60%~100%范围内且固定两相平均流速时,FRMS随β的增大而减小;FRMS随分相折算速度的增加而增大。最后通过建立数学模型总结出了水平弯管内气液两相流诱导振动的机理,并提出了针对性的减振措施。
[Abstract]:The numerical simulation of the gas-liquid two-phase flow induced vibration in a horizontal curved tube is carried out by using the multi-field coupled finite element software Adina and the arbitrary Lagrangian Eulerian (Ale) dynamic grid method, and the vibration response characteristics and flow patterns of the pipe structure are emphatically investigated. The effect of volume gas content 尾 and phase conversion velocity on the excitation force. The results show that the dynamic response of the tube structure is a mixture of random vibration and periodic vibration in the low frequency band, and the main frequency increases with the increase of the velocity of phase separation. The root mean square (RMS) value of pulsating excitation force is the largest in annular flow and the smallest in long bubble flow, and 尾 decreases with the increase of 尾 in the range of 60 ~ 100% and the average velocity of two phases increases with the increase of the velocity of phase conversion. Finally, the mechanism of gas-liquid two-phase flow induced vibration in horizontal bends is summarized by establishing a mathematical model, and the corresponding damping measures are put forward.
【作者单位】：山东大学能源与动力工程学院;
【基金】：山东科技发展计划项目(2012GGX10421)
【分类号】：TB53

【相似文献】