This study investigated the application of dual-frequency type dynamic acoustic fields for size-selective particle separation on centimeter scale in a continuous flow. The 3D-printed X-shaped prototype has two inlets and two outlets. The dynamic acoustic field is generated by two transducers positioned under an angle of ${60}^{°}$ and operating at slightly different frequencies. The acoustic reflections are eliminated by placing sound-absorbing material inside the prototype and the non-resonant operation is confirmed by the electrical admittance measurements. Numerical calculations suggested that pressure generated by each transducer does not need to have equal amplitude. Computer simulations and lab experiments were carried out for different frequency differences and flow rates. The results demonstrated the ability of dual-frequency dynamic acoustic fields for size-selective particle filtration on centimeter scale, with a total flow rate up to.$1\mathrm{L}{\mathrm{h}}^{-1}.$

这项研究调查了双频型动态声场在连续流中厘米级尺度上的尺寸选择颗粒分离中的应用。3D打印的X形原型具有两个入口和两个出口。动态声场是由两个换能器以一定角度放置的。${60}^{°}$并且工作频率略有不同。通过将吸音材料放在样机内部来消除声反射，并且通过电导率测量来确认非谐振操作。数值计算表明，每个换能器产生的压力不必具有相等的振幅。针对不同的频率差异和流速进行了计算机模拟和实验室实验。结果表明，双频动态声场具有在厘米尺度上进行尺寸选择颗粒过滤的能力，总流速最高为。$\mathrm{1个}\mathrm{大号}{\mathrm{H}}^{--\mathrm{1个}}。$