非牛顿流体的黏弹性对气泡溃灭的影响  

TEffects of Viscoelasticity of Non-Newtonian Fluid on the Bubble Collapse

作　　者：纪俊红[1] 李向龙[2] 

机构地区：[1]辽宁工程技术大学安全学院,辽宁葫芦岛125105 [2]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《南水北调与水利科技》2013年第3期86-91,150,共7页South-to-North Water Transfers and Water Science & Technology

摘　　要：气穴现象广泛存在于工程机械中。为了研究了壁面附近气泡的黏弹性对固体壁面的影响情况,以5%的聚丙烯酰胺(PAM)的水溶液为例,建立了数学模型和控制方程,并采用边界积分法求解控制方程,利用三次样条函数描绘了气泡表面。同时还探讨了气泡摆动、气泡喷射位置、流体对气泡喷射速度的扰动等气泡动力学现象。研究结果表明,黏弹性可以抑制射流的形成,进而减轻汽蚀。The phenomenon of cavitation has been found in many engineering plants. In order to investigate the viscoelastic effects of bubbles near a rigid boundary,a mathematical model and governing equation were developed based on the example of 5% polyacrylamide （PAM） water solution. The boundary integral method was used to solve the governing equation and the cu- bic spline function was used to characterize the bubble surface. Furthermore, the bubble dynamics phenomena were studied in this paper, including the occurrence of bubble oscillation,jet position of bubble, and the turbulence of fluid on jet velocities. The results showed that viscoelasticity of the bubble can restrain the formation of liquid jet, thereby reducing the cavitation damage.

关 键 词：FLUENT模拟 黏弹性 气泡 汽蚀 

分 类 号：TP601[自动化与计算机技术—控制理论与控制工程]