针对生物、化学、医学、航空等领域混合输送微流体、微流体介质的需要, 提出了集流体混合、泵送为一体的复合阻流体无阀泵, 并借助复合阻流体致涡实现涡致混合功能。基于流体绕流原理对绕流阻力进行了全新诠释和表达; 并利用“尾流空间压强比较法”和“流体单元动量分析法”进行了绕流复合阻流体的阻力分析, 揭示了复合阻流体致阀及其本质性成因; 改变传统无阀泵的结构, 通过引入分流环和复合阻流体, 减少泵回流量的同时实现了涡致混合的功能。制作了泵样机, 在驱动频率为11 Hz、电压为180 V条件下进行了泵流量试验和流体混合试验, 其瞬时流量达到53.7 mL/min; 同时, 借助流体涡的运动较好地混合了流体, 试验验证了新型泵具有混合及泵送流体的功能。新型泵的提出创新和丰富了无阀泵的结构和功能, 为无阀泵应用于微流体混合传输领域奠定了基础。

In order to meet the demands of transmitting mixed micro-fluidics and micro-fluid media in the fields of biology, chemistry, medicine, aviation, etc., a compositedrag-reducing fluid and avalve-less pump that integrates fluid mixing and pumping was proposed.It enabled simultaneous vortex inducing and mixing by using a bluff body. A new interpretation and expression of flow resistance was established based on fluid flow theory. Aresistance analysis of the vortex-inducing composite bluff body was carried out by a "comparative method of pressure around the wake flow" and a "fluid unit momentum analysis", which revealed the essential mechanisms of the composite bluff body-causing valve and pump. The structure of a traditional valve-less pump was modified, and swirl mixing was realized while the pump-back flow was reduced by introducing a shunt ring and a composite bluff body group. A pump prototype was developed, and the pump flow and fluid mixing tests were carried out at a driving frequency of 11 Hz and avoltage of 180 V. The instantaneous flow rate reached 40.1 ml/min and the fluid was well mixed by the motions of the fluid vortex. These tests verify that the new type of pump can mix and transmit fluidsbetter than other types. It improves the structure and function of the valve-less pump, and at the same time, lays a foundation for the useof valve-less pumps in the field of micro-fluid transmission.