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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (2): 249-255    DOI: 10.3785/j.issn.1008-973X.2013.02.009
机械工程     
无阀微泵损失系数及整流效率
应济, 曹超, 焦致凯
浙江大学 机械工程学系,浙江 杭州 310027
Loss coefficient and rectification efficiency based on
valveless micropump
YING Ji, CAO Chao, JIAO Zhi-kai
Department of Mechanical Engineering,Zhejiang University,Hangzhou 310027,China
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摘要：

为了得到适于无阀微泵所处低雷诺数层流条件下的总压/压强损失理论,对扩张/收缩管组件各部分进行优化设计.由能量耗散和压强降低原理,建立无阀微泵的总压以及压强损失理论;利用有限元软件,建立扩张/收缩管组件的有限元模型,进行流场仿真分析;分析驱动压强,扩张角对扩张/收缩管组件总压/压强损失以及整流效率的影响.仿真结果显示:扩张/收缩管组件各部分总压损失均不可忽略;当无量纲压力pw大于6.4×104时,出口段的压强损失可以认为是0;总损失系数随扩张角以及驱动压强的增大而减小;当pw小于4.48×104时,扩张角越大微泵整流效率越高;而当pw大于19.2×104时,扩张角越小微泵整流效率越高.
Abstract:

To get the proper total pressure/pressure loss theory of valveless micropump in the case of low reynolds laminar flow and make optimal design for each part of diffuser/nozzle component. Based on the principle of energy dissipation and pressure loss，the total pressure/pressure loss theory of valveless micropump was established. The finite element model of diffuser/nozzle component was built by using the finite element software and the flow simulation analysis was carried out. The effects of driven pressure, divergence angle on total pressure/pressure loss and rectification efficiency of diffuser/nozzle component was analyzed. The simulation results show that: the total pressure loss of each part of diffuser/nozzle component can not be ignored. When the dimensionless pressure pw greater then 6.4×104, the pressure loss of exit section can be regarded as 0. The total loss coefficient decrease with the increase of divergence angle and driven pressure. When pw less then 4.48×104 , the larger divergence angle micropump have better rectification efficiency, while pw great then 19.2×104, the smaller divergence angle micropump have better rectification efficiency.
Key words:
出版日期: 2013-02-01
:  TH 38  
基金资助:

国家自然科学基金资助项目（50475104）；浙江省自然科学基金重点资助项目(Z106519).
作者简介: 应济（1964—）,男,博士,副教授,主要从事塑料机械和微系统方面的研究.E-mail: yingji_zju@yahoo.cn
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引用本文:

应济, 曹超, 焦致凯. 无阀微泵损失系数及整流效率[J]. J4, 2013, 47(2): 249-255.

YING Ji, CAO Chao, JIAO Zhi-kai. Loss coefficient and rectification efficiency based on
valveless micropump. J4, 2013, 47(2): 249-255.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.02.009    或    http://www.zjujournals.com/eng/CN/Y2013/V47/I2/249

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