STUDY ON ACCURATE-HIGH SPEED POWDER CLASSIFICATION SYSTEM CONSIDERING PARTICLE CHARACTERISTICS
考虑颗粒特性的精确高速粉体分级系统研究
基本信息
- 批准号:15560156
- 负责人:
- 金额:$ 2.37万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
WE PROPOSE A NEW WET TYPE CENTRIFUGAL CLASSIFICATION SYSTEM TO WHICH A STABLE AND AXISYMMETRIC ALMOST RIGIDLY ROTATING FLOW CAN BE APPLIED. THE CLASSIFICATION SYSTEM HAS DISTINCTIVE FEATURES IN THAT WE CAN ARBITRARY SET THE RATIO OF THE CENTRIFUGAL FORCE TO THE FLUID DRAG ACTING ON PARTICLES AND CAN THEORETICALLY INVESTIGATE THE CLASSIFICATION MECHANISM FROM THE PARTICLE TRAJECTORIES BY NUMERICAL SIMULATION. WE PREVIOUSLY INVESTIGATED RESULTS OF THE CLASSIFICATION PERFORMANCE FOR VARIOUS THROUGH FLOW RATE AND ROTATION RATE, AND CLARIFIED THE DEPENDENCE OF THE SHARPNESS INDEX AND CUT SIZE ON EKMAN AND ROSSBY NUMBERS FOR THE SPHERICAL PARTICLES FROM ONE-MICRON TO SUB MICRON REGIME HAVING TRUE SPECIFIC GRAVITY NEAR ONE. HOWEVER, THE THROUGHPUT IS SMALL FOR THE SYSTEM. INDUSTRIAL NEEDS ALSO DEMAND MORE ACCURATE CLASSIFICATION OF PARTICULATE MATERIALS HAVING VARIOUS SHAPES AND TRUE SPECIFIC GRAVITY MORE THAN TWO. HENCE IN ORDER TO MAKE THIS SYSTEM PRACTICABLE, WE HAVE TO EXTEND THE SYSTEM TO MORE EFFICIENT ONES.THE OBJECTIVE OF THE PRESENT STUDY IS TO DEVELOP THE CLASSIFICATION SYSTEM TO A NEW TECHNIQUE ON THE CLASSIFICATION SYSTEM SATISFYING INDUSTRIAL NEEDS. WE HAVE OBTAINED THE FOLLOWING RESULTS:1. IN ORDER TO CLARIFY A SCALING LAW ON THE GRAVITY FORCE, WE DEFINE CENTRIFUGAL EFFECT PARAMETER Ce, GRAVITATIONAL EFFECT PARAMETER Ge AND PARTICLE REYNOLDS NUMBER Re. AND WE INVESTIGATE THE RELATION BETWEEN THESE PARAMETERS AND THE DIFFERENCE OF FLUID AND PARTICLE VELOCITIES IN THE STEWARTSON LAYER WHICH IS THE MAIN CLASSIFICATION FLOW FIELD.2. WE CALCULATED THE PARTICLE TRAJECTORIES AND THE PROBABILITY DENSITY DISTRIBUTION OF THE PARTICLES BY THE NUMERICAL SIMULATION. AND WE INVESTIGATE THE CLASSIFICATION MECHANISM IN THE EKMAN AND STEWARTSON LAYERS.3. WE TREAT NEW SYSTEM WITH A SIMPLE SHAPE LIKE A DISK-CYLINDER SHAPE AND EVALUATE ITS CLASSIFICATION PERFORMANCE BY NUMERICAL SIMULATION.
本文提出了一种新的湿式离心分级系统,它可以应用稳定的轴对称几乎刚性旋转流。该分类系统的特点是可以任意设定作用于颗粒的离心力与流体阻力之比,并可以通过数值模拟从理论上揭示颗粒的分类机理。本文对不同通流率和转速下的分级性能进行了试验研究,并对真比重接近1的1微米至10微米范围内的球形颗粒,阐明了尖锐度指数和粒度与Ekman数和Rossby数的关系。但是,系统的吞吐量很小。工业上也需要对具有各种形状和真实比重大于2的颗粒材料进行更精确的分类。因此,为了使这一系统实用化,我们必须将这一系统扩展到更有效的系统。本研究的目的是将这一分类系统扩展到一种新的技术,使其能够满足工业需要。我们取得了以下成果:1.为了阐明引力的标度律,我们定义了离心效应参数Ce、引力效应参数Ge和粒子雷诺数Re。并阐明了这些参数与主要分类流场中的Stewart层中流体和颗粒的速度差之间的关系.通过数值模拟计算了颗粒的运动轨迹和概率密度分布。并对Ekman层和Stewart son层的分类机制进行了分析.我们对一个简单的圆盘-圆柱形的新系统进行了处理,并通过数值模拟来验证它的分类性能。
项目成果
期刊论文数量(32)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
NEW ACCURATE WET-TYPE CENTRIFUGAL CLASSIFICATION SYSYEM WITH HIGH THROUGHPUT BY ALMOST RIGIDLY ROTATING FLOW
新型精确湿式离心分级系统,通过几乎刚性的旋转流实现高吞吐量
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:中林功一;中林功一;Yoichi Tsuchida;YOICHI TUCHIDA
- 通讯作者:YOICHI TUCHIDA
土田陽一, 中林功一, 三石浩貴: "スチュワートソン層流れの数値的・理論的研究"日本機械学会東海支部第53期総会講演会講演論文集. No. 43-1. 389-390 (2004)
Yoichi Tsuchida、Koichi Nakabayashi、Hiroki Mitsuishi:《Stewartson 层流的数值和理论研究》日本机械工程学会东海分会第 53 届大会论文集第 43-390 号。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Koichi Nakabayashi, Yoichi Tsuchida: "Accurate wet-type centrifugal classification using an almost rigidly rotating flow-classification principle and performance of the batch-type classification"Advanced Powder Technology. 15・1. (2003)
Koichi Nakabayashi、Yoichi Tsuchida:“使用几乎刚性旋转流动分级原理的精确湿式离心分级和间歇式分级的性能”15・1。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
エクマン層とスチュワートソン層における微粒子軌道の統計的研究
Ekman 和 Stewartson 层中粒子轨迹的统计研究
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:中林功一;中林功一
- 通讯作者:中林功一
準剛体回転流を用いた遠心分級方式における高処理量化の試み
尝试使用半刚性旋转流提高离心分级的吞吐量
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:Y.Tsuchida;K.Nakabayashi;土田陽一
- 通讯作者:土田陽一
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NAKABAYASHI Koichi其他文献
NAKABAYASHI Koichi的其他文献
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{{ truncateString('NAKABAYASHI Koichi', 18)}}的其他基金
Turbulence Structure of Push-Pull-Jet on Perfect Push-Pull Local Ventilation system and its design
完美推拉式局部通风系统推拉射流湍流结构及其设计
- 批准号:
19560185 - 财政年份:2007
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
BASIC STUDY ON THE PERFECT PUSH-PULL LOCAL VENTILATION SYSTEM OF TOXIC GAS.
有毒气体完善推拉式局部通风系统的基础研究。
- 批准号:
17560163 - 财政年份:2005
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Control of super-critical distribution in spherical Couette flow by introduction of outside disturbances
引入外部扰动控制球形库埃特流的超临界分布
- 批准号:
10650169 - 财政年份:1998
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Study and turbulence control of the laminar-turbulent transition in the spherical Couette flow
球形库埃特流层流-湍流转变的研究与湍流控制
- 批准号:
08650198 - 财政年份:1996
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Study on Hysteresis Phenomenon and Local Non-equilibrium Turbulence in Couette-type Turbulent Flow
库埃特型湍流中滞后现象与局部非平衡湍流研究
- 批准号:
03452123 - 财政年份:1991
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
Developmental study of a new technique to classify submicron particles
亚微米颗粒分级新技术的发展研究
- 批准号:
03555037 - 财政年份:1991
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
Study of Hydrodynamic Lubication Mechanism based on the Theory of Turbulence
基于湍流理论的流体动力润滑机理研究
- 批准号:
61460101 - 财政年份:1986
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)