3D-不对称菱形被动式微混合器混合特性

鲁聪达; 薛浩; 吴化平; 付强; 文东辉

doi:10.3788/OPE.20172509.2377

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3D-不对称菱形被动式微混合器混合特性

微纳技术与精密机械 | 更新时间：2020-08-13

- 3D-不对称菱形被动式微混合器混合特性
- Mixing characteristics of passive-type micro-mixer with 3D-asymmetrical rhombus
- 光学精密工程 2017年25卷第9期页码：2377-2386
- 作者机构：
  
  浙江工业大学特种装备制造与先进加工技术教育部重点实验室, 浙江杭州 310014
- 作者简介：
  
  [ "鲁聪达(1964-), 男, 浙江慈溪人, 博士, 教授, 博士生导师, 1989年于北京农业工程大学获得硕士学位, 2007年于浙江工业大学获得博士学位, 现为浙江工业大学机械工程学院博士后办公室、工程硕士办公室主任, 主要从事模具设计与制造关键技术、燃料电池制造关键技术、机械工程管理等方面的研究.E-mail:lcd@zjut.edu.cn" ]
  [ "薛浩(1991-), 男, 安徽宿州人, 硕士研究生, 2014年于皖西学院获得学士学位, 主要从事微混合器及微反应器件应用研究.E-mail:xuehao_yan@163.com" ]
- 基金信息：
  
  国家自然科学基金资助项目(51775510);国家自然科学基金资助项目(11372280);浙江省科技厅公益项目(2016C31G2020052);浙江省科技厅公益项目(2016C31G2020044)
- DOI：10.3788/OPE.20172509.2377
  中图分类号： TQ027.1
- 收稿日期：2017-03-15，
  
  录用日期：2017-6-22，
  
  纸质出版日期：2017-09
- 稿件说明：
移动端阅览
鲁聪达, 薛浩, 吴化平, 等. 3D-不对称菱形被动式微混合器混合特性[J]. 光学精密工程, 2017,25(9):2377-2386.

Cong-da LU, Hao XUE, Hua-ping WU, et al. Mixing characteristics of passive-type micro-mixer with 3D-asymmetrical rhombus[J]. Optics and precision engineering, 2017, 25(9): 2377-2386.
鲁聪达, 薛浩, 吴化平, 等. 3D-不对称菱形被动式微混合器混合特性[J]. 光学精密工程, 2017,25(9):2377-2386. DOI： 10.3788/OPE.20172509.2377.

Cong-da LU, Hao XUE, Hua-ping WU, et al. Mixing characteristics of passive-type micro-mixer with 3D-asymmetrical rhombus[J]. Optics and precision engineering, 2017, 25(9): 2377-2386. DOI： 10.3788/OPE.20172509.2377.

摘要

提高微混合器雷诺数的适用范围和混合强度是微混合器设计的发展趋势。本文基于非对称分离重组混合原理设计、制作了一种3D-不对称菱形被动式微混合器，并借助数值分析方法和可视化实验对混合强度和混合状态的变化进行了研究。研究发现：在低

（0.01~10）范围内，两组分间的混合以扩散混合为主，随着

的增加，流速对混合强度的影响有一定下降；在较高

（10~200）范围内，受流速增加的影响，流体间不平衡微流惯性碰撞逐渐成为影响混合的主要因素。此时，混合强度随流速的增加逐渐增强并趋于平稳。对

在0.01~200内的微混合器展开研究，分析了宽缝比

、分合角

、宽厚比

H/S

等结构尺寸对混合强度的影响。通过综合考虑流体混合强度和通道压降的变化情况，确定最佳通道结构尺寸为

=0.2、

=45°、

H/S

=0.5，此时微混合器的混合强度可维持在78%以上。与传统平面对称分合式混合器相比，设计制作的3D-不对称菱形被动式微混合器混合强度有较大的提高，验证了本文设计结构的有效性。

Abstract

Increasing applicable scope of Reynolds number and mixing strength is development trend of micro-mixer design. A passive-type micro-mixer of 3D-asymmetrical rhombus was designed and manufactured on the basis of asymmetrical separation and reconstruction mixing principle

and change of mixing strength and mixing state were studied by means of numerical analysis and visualized experiment. Results indicate that in scope of low

(0.01~10)

the mixing between two components is dominated by diffusion mixing

with increase of

the influence of flow speed on mixing strength decreases to a certain degree; in higher scope of

(10~200)

influenced by increase of flow speed

the inter-fluid imbalance inertia collision becomes the main factor affecting mixing

and mixture strength gradually increases and tends to be stable with increase of flow speed. Take the micro-mixer with

scope of (0.01~200) as research object

influence of structural sizes such as width slit ratio

divided-compound angle

width-to-thickness ratio

H/S

etc on mixing strength was analyzed. By taking into consideration of fluid mixing strength and change of passage pressure drop comprehensively

the optimum structural size of passage was designed as

=0.2

=45°

H/S

=0.5

and mixing strength of micro-mixer can maintain above 78%. Compared with traditional planar symmetrical separation-and-reconstruction mixer

mixing strength of designed passive-type micro-mixer of 3D-asymmetrical rhombus is greatly increased

which verifies the effectiveness of the structure.

关键词

Keywords

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