In this paper, the performance of the fluidic oscillator with resonance channel and vortex amplifier is numerically investigated. The unsteady flow generated in this oscillator is simulated in the three-dimensional model with the assumption of turbulent flow using the DES model. The effects of different geometric parameters on the output frequency of the oscillator were investigated by changing the height of the resonance channel, placing triangular, square, and circular splitters, changing the splitter distance from the supply nozzle and, changing the state of control nozzles. Results indicate that the highest frequency variation is due to the change of the distance between the supply nozzle and splitter. By changing the splitter distance, the output frequency varies from 11 to 66 Hz. Reducing the height of the resonance channel leads to an increase in the output frequency. It has also been shown in the results that the frequency achieved using a triangular splitter is lower than square and circular splitters. Moreover, the output frequency is shifted with different output angles, achieving the highest frequency (43.48 Hz) using the 40-degree angle. A characteristic curve correlating the oscillation frequency $\left(f\right)$ with the outlet area angle $\left(\theta \right)$ was obtained, which is expressed as $f=-0.0009{\theta }^3+0.0553{\theta }^2+0.581\theta -18.4$.

本文对具有谐振通道和涡流放大器的流体振荡器的性能进行了数值研究。使用DES模型，在假设湍流的情况下，在三维模型中模拟了在此振荡器中产生的非稳态流。通过改变谐振通道的高度，放置三角形，正方形和圆形分离器，改变分离器与供料喷嘴的距离以及改变控制喷嘴的状态，研究了不同几何参数对振荡器输出频率的影响。结果表明，最大的频率变化是由于进料喷嘴和分流器之间距离的变化引起的。通过更改分离器距离，输出频率从11到66 Hz不等。减小共振通道的高度导致输出频率的增加。结果还表明，使用三角形分离器实现的频率低于方形和圆形分离器。此外，输出频率以不同的输出角度移动，使用40度角可获得最高频率（43.48 Hz）。与振荡频率相关的特性曲线$\left(F\right)$ 与出口面积成角度 $\left(\theta \right)$ 获得，表示为 $F=--0.0009{\theta }^3+0.0553{\theta }^2+0.581\theta --18.4$。