Study on the Control of the Motion of Fine Particles in an Almost Rigidly Rotating Flow

几乎刚性旋转流中细颗粒运动的控制研究

• 批准号: 11650172
• 负责人: TSUCHIDA Yoichi
• 金额: $ 1.98万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650172/
• 关键词: Internal Flow; Axisymmetric Flow; Multi-phase Flow; Particle Motion; Almost Rigidly Rotating Flow; Stewartson Layer; Ekman Layer; Source-Sink Flow

We considered two methods to control the motion of fine particles dispersed with very low mass-concentration in an almost rigidly rotating though-flow within a highly rotating double-walled container consisting of a housing and a core. This flow is produced under very small Rossby and Ekman numbers, and consists of Ekman and Stewartson layers and interior and rigid-rotation regions.1. Method to control the particle motion by shaping walls arbitrarilyFirst, in order to clarify flow characteristics of the Stewartson layer, we derived theoretical solutions of the Stewartson-layer flow for the arbitrarily shaped walls by a pertubation method. Next, we derived theoretical solutions of the motion of the fine particles in the flow, and considered the relationship between the particle motion and wall configuration.2. Method to control the particle motion by setting a source flowWe numerically simulated the flow and particle motion in the case in which the source flow is set normal to the wall attached the Stewartson layer and is set parallel to the rotation axis at the wall attached to the Ekman layer, and considered the influence of the source flow on the flow and particle motion.

我们考虑了两种方法来控制在由壳体和芯体组成的高旋转双壁容器内的几乎刚性旋转的通流中以非常低的质量浓度分散的细颗粒的运动。这种流动是在非常小的Rossby数和Ekman数下产生的，并且由Ekman层和Stewartson层以及内部和刚性旋转区域组成。通过任意形状壁面控制颗粒运动的方法首先，为了阐明Stewartson层流的流动特性，我们用摄动法导出了任意形状壁面下Stewartson层流的理论解。其次，推导了细颗粒在流动中运动的理论解，并考虑了颗粒运动与壁面形状之间的关系.通过设置源流控制颗粒运动的方法我们对源流垂直于Stewartson层附壁和平行于Ekman层附壁处旋转轴的情况下的流动和颗粒运动进行了数值模拟，并考虑了源流对流动和颗粒运动的影响。

项目成果

中林功一: "サブミクロン粒子の高精度分級の実験的研究(分級性能に及ぼすフィード方法の影響)"日本機械学会講演論文集. 003-1. 31-32 (2000)

Koichi Nakabayashi：“亚微米颗粒高精度分级的实验研究（进料方法对分级性能的影响）”日本机械工程师学会会议记录 003-1（2000）。

土田陽一: "任意形状容器内の剛体回転領域に接するスチュワートソン層の理論解析"日本流体力学会講演論文集. 年会2000. 403-404 (2000)

Yoichi Tsuchida：“与任意形状容器中的刚性旋转区域接触的 Stewartson 层的理论分析”日本流体动力学学会会议记录 2000 年。403-404 (2000)

Koichi Nakabayashi: "Scaling Law of Fine particle Classification by Almost Rigidly Rotating Flow"J.Soc. Powder Technol., Japan (in Japanese). No. 37-11. 800-807 (2000)

Koichi Nakabayashi：“几乎刚性旋转流的细颗粒分类的标度定律”J.Soc。

Koichi Nakabayashi: "Accurate Wet-type Centrifugal Classification using an Almost Rigidly Rotating Flow"Proc. of 1st Asian Particle Technology Symp.. (in press). 6 (2001)

Koichi Nakabayashi：“使用几乎刚性旋转流的精确湿式离心分级”Proc。

Koichi NAKABAYASHI: "Accurate Wet-type Centrifugal Classification using an Almost Rigidly Rotating Flow"Proc.of 1st Asian Particle Technology Symposium. (印刷中). 6 (2001)

Koichi NAKABAYASHI：“使用几乎刚性旋转流的精确湿式离心分级”Proc.of 1st Asian Particle Technology Symposium 6（印刷中）。