In this work, a three-dimensional Computational Fluid Dynamic (CFD) analysis of a swirling jet reactor was implemented to gain a better understanding of fluid dynamics into the reactor. The effect of different geometries of the reactor, by considering different diameters of the injection slots of the reactor, on flow velocity and flow pressure distributions was investigated. Firstly, a one-phase model was implemented by considering only water into the reactor. Then, a two-phase model was defined including dissolved air into the water. The inlet flow pressure was set to 0.25 bar to consider non-cavitating conditions and, then, to get more accurate results on fluid dynamics into the reactor due to the absence of cavitating conditions. Data collected from experimental tests were used to calibrate and validate the model. Results of numerical simulations were in good agreement with experimental data, showing for all the geometries a rotating flow around the central axis of the reactor and at the exit of the double cone. The highest flow velocities and flow pressure drops were observed for the reactor geometry with the smallest injection slots diameters. Finally, noise measurements were performed during another set of experimental tests by considering different inlet flow pressures.

在这项工作中，对旋流射流反应器进行了三维计算流体动力学（CFD）分析，以更好地了解进入反应器的流体动力学。通过考虑反应器的注入槽的不同直径，研究了反应器的不同几何形状对流速和流动压力分布的影响。首先，通过仅考虑进入反应器的水来实现单相模型。然后，定义了一个两相模型，其中包括溶解到水中的空气。入口流动压力设置为0.25 bar，以考虑非空化条件，然后由于不存在空化条件，从而获得进入反应器的流体动力学更准确的结果。从实验测试中收集的数据用于校准和验证模型。数值模拟的结果与实验数据非常吻合，显示了所有几何形状围绕反应器中心轴和双锥出口处的旋转流。对于具有最小注入槽直径的反应器几何结构，观察到最高的流速和流量压降。最后，在另一组实验测试中，通过考虑不同的入口流量压力进行了噪声测量。