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描述水力旋流器内多相流动的流体动力学方程组是现象模型的基础。该模型能适应较宽的工作范围,更重要的是在模型中包括了设备的几何尺寸。建立模型的工作包括预估水流的三维速度、湍流强度、固体颗粒与水流的相对速度,并最终定出分离效率。本研究在75mm水力旋流器中用激光多谱勒速度计(LDV)测量了水相的速度分布,并通过纳维尔—斯托克斯(Navier-stcks)预算了水流的三维速度,预测的速度分布与实测结果相当符合。接着,考查颗粒的受力平衡,用代数逼近法(algebraic slip approach)求出颗粒与水流的相对运动,同时从一系列单一粒度颗粒的运动导出了分离效率曲线。
The hydrodynamic equations that describe multiphase flow in a hydrocyclone are the basis of a phenomenological model. The model can adapt to a wide range of work, more importantly, the model includes the geometric dimensions of the device. Modeling efforts include predicting the three-dimensional velocity of the water stream, the turbulence intensity, the relative velocity of the solid particles to the water stream, and ultimately the separation efficiency. In this study, the velocity distribution of the aqueous phase was measured by laser Doppler velocimetry (LDV) in a 75 mm hydrocyclone and the 3D velocity of the water flow was estimated by Navier-Stokes. The predicted The velocity distribution is in good agreement with the measured results. Next, the force balance of the particles is examined, and the relative motion between the particles and the water flow is determined by the algebraic slip approach. At the same time, the separation efficiency curve is derived from the motion of a series of single-particle particles.