特斯拉型混合器中障碍物布局的优化

Optimization of Obstacle Layout in Tesla Mixer

微混合器作为一种可以实现快速、高效的混合设备在生物分析、化学反应和检测等领域中应用,特斯拉阀因其简单的结构和特殊的流动机理常应用于微混合器的结构设计中。为提高混合效率,在特斯拉型混合器中添加菱形障碍物,并基于流场分析对其布局进行了优化和实验验证。以混合率和压降比值最大为优化目标对菱形障碍物在特斯拉型微混合器布局进行优化,经过优化得最优菱形障碍物尺寸为46.35μm,最优横向偏移量为18.78μm,最优竖向偏移量为20μm。基于优化结果,设计并制作了添加菱形障碍物的特斯拉型微混合器并对微混合器的混合效果进行实验验证。结果表明设计优化的菱形障碍物特斯拉型微混合器与未添加障碍物时的特斯拉型微混合器相比在相同条件下具有更高的混合效率。

As a fast and efficient mixing equipment,micro mixer is applied in the fields of biological analysis,chemical reaction and detection.Tesla valve is often used in the structural design of micro mixer because of its simple structure and special flow mechanism.In order to improve the mixing efficiency,diamond obstacles are added to the Tesla mixer,and its layout is optimized and verified by experiments based on flow field analysis.Taking the maximum mixing rate and pressure drop ratio as the optimization objective,the layout of diamond obstacle in Tesla micro mixer is optimized.After optimization,the optimal size of diamond obstacle is 46.35μm.The optimal lateral offset is 18.78μm.The optimal vertical offset is 20μm.Based on the optimization results,a Tesla micro mixer with diamond obstacles is designed and manufactured,and the mixing effect of the micro mixer is verified by experiments.The results show that the optimized diamond obstacle Tesla micro mixer has higher mixing efficiency than the Tesla micro mixer without obstacles under the same conditions.