新型无阀微泵扩张微流道中流体动力学特性的仿真分析  

CFD simulation on hydrodynamic characteristics of fluidic flowing in micro diffuser element of valveless micro-pump

作　　者：王伟[1] 刘世炳[1] 陈涛[1] 左铁钏[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100022

出　　处：《工程设计学报》2005年第4期223-226,共4页Chinese Journal of Engineering Design

基　　金：国家"863"计划资助项目(2004AA404260);国家自然科学基金资助项目(50175002);北京市自然科学基金重点资助项目(3031001).

摘　　要：对新型收缩/扩张型无阀微泵泵腔结构中扩张微流道内流体的流动特性进行CFD仿真分析,得到扩张角度、雷诺数(R e)等参数对微流道中流体阻力损失系数的影响.仿真结果显示,对于任一确定的扩张角度和雷诺数,都对应一个最小阻力损失系数,但对于不同的扩张角度,阻力损失系数随雷诺数的不同呈明显的非线性依赖特征;扩张角度较小时,阻力损失系数随雷诺数的增大而减小,而当扩张角度较大时,阻力损失系数随雷诺数的增大而增大.CFD simulation on flowing characteristics of liquid in micro diffuser element in chamber of a new type nozzle/diffuser valveless micro-pump is conducted. Through such simulation, the influences of the parameters, such as diffuser angle, Re number, on fluidic pressure loss coefficient is achieved. The result of simulation indicates that although any given diffuser angle and Re number have a corresponding minimum pressure loss coefficient, pressure loss coefficient will decrease with the increase of Re number when diffuser angle is small while pressure loss coefficient will increase with the increase of Re number when diffuser angle is large.

关 键 词：扩张微流道 流体动力学仿真 流体阻力损失系数 

分 类 号：TH137[机械工程—机械制造及自动化]