渐变截面型入料口夹角对旋流器流场及压降的影响

发布时间：2018-05-19 23:04

  本文选题：水力旋流器 + 数值模拟　； 参考：《东北大学学报(自然科学版)》2017年06期

【摘要】：利用RSM雷诺应力模型和VOF多相流模型,通过数值试验方法考察了渐变截面型入料口夹角对Φ50 mm水力旋流器流场及压降的影响.结果表明,增大入料口夹角,切向速度增加,致使分离效率提高;与此同时,轴向速度和溢流管底端的最大径向速度也随之相应增加,导致沉砂分流比略有降低、短路流量增加,但对湍流结构影响不明显;空气柱直径同样随着夹角的增加而增大,从而有效分选空间减小.旋流器内部的压力损失主要包括主分离区域的损失和入料口区域的损失;增大入料口夹角,总压降增加,导流能力增强,当夹角为20°时,导流性能最优,但能量利用率降低.
[Abstract]:By using RSM Reynolds stress model and VOF multiphase flow model, the influence of the angle between the inlet and the inlet of the graded cross section on the flow field and pressure drop of 桅 50mm hydrocyclone was investigated by numerical experiments. The results show that the separation efficiency is improved by increasing the angle of inlet and the tangential velocity, at the same time, the axial velocity and the maximum radial velocity at the bottom of the overflow pipe increase accordingly, which results in a slight decrease in the sand-sinking diffluence ratio. The short circuit flow rate increases, but the influence on the turbulence structure is not obvious, and the air column diameter increases with the increase of the angle of the air, thus the effective separation space decreases. The pressure loss in the cyclone mainly includes the loss of the main separation region and the inlet area, the increase of the inlet angle, the increase of the total pressure drop and the enhancement of the flow conductivity. When the angle is 20 掳, the diversion performance is optimal, but the energy utilization ratio is reduced.
【作者单位】： 东北大学资源与土木工程学院;
【基金】：国家自然科学基金资助项目(51474054,51504054) 矿物加工科学与技术国家重点实验室开放研究基金资助项目(BGRIMM-KJSKL-2015-04)
【分类号】：TD45
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本文编号：1912073