梭锥管水沙两相流场数值模拟及结构优化研究
发布时间：2018-12-12 03:29
【摘要】：梭锥管混浊流体分离装置（简称梭锥管）是一种新型的、无需添加任何化学药剂和外加动力、处理含极细沙（包括粘粒）的水沙两相流分离装置。为了补充和完善水沙分离机理及结构型式优化原则，本文以前人的研究结果为基础，应用理论分析、试验研究和数值模拟相互验证和补充的方法对梭锥管内部水沙两相流场特性及结构型式优化原则进行研究。 通过水沙两相流场二维数值模拟，得到结构尺寸相同的梭锥管与普通装置内泥沙静水沉降过程的流速分布和浓度分布规律，并对结果进行分析和对比，揭示了梭锥管在水沙分离效率方面优于普通装置的原因。通过三维数值模拟，对不同进流量、不同进流浓度的均匀沙和非均匀沙梭锥管水沙两相流场进行数值模拟，获得全面详细的梭锥管内部流动特性，并据此，揭示梭锥管水力分离水沙的机理。通过非均匀沙流场的数值模拟，获得了不同粒径的泥沙在梭锥管内的分布规律及其截除率。 建立了转角、锥圈倾角、下锥管倾角、锥圈位置及布水管的安装位置不同的30个梭锥管模型，通过二维和三维水沙两相流场数值模拟，，对比分析不同模型内的流速场、浓度场的异同点及其对水沙分离效率的影响，从而补充和完善了梭锥管结构型式优化原则，为梭锥管应用于实际和优化其运行工况提供指导。
[Abstract]:The shuttle-cone tube turbid fluid separation device is a new type of water-sediment two-phase separation device without adding any chemical agent and external force. In order to supplement and improve the principle of water and sediment separation mechanism and structural pattern optimization, the previous research results of this paper are applied to theoretical analysis. The experimental study and numerical simulation were carried out to study the characteristics of water and sediment two-phase flow field and the optimization principle of structure pattern in a shuttle cone tube. Through two-dimensional numerical simulation of two-phase flow field of water and sediment, the velocity distribution and concentration distribution of sediment static water settlement process in the same size shuttle cone tube and common device are obtained, and the results are analyzed and compared. The reason why the shuttle-cone tube is superior to the common equipment in the separation efficiency of water and sediment is revealed. Through three dimensional numerical simulation, the two-phase flow field of uniform sand and non-uniform sand shuttle cone tube with different inlet flow rate and different inlet concentration are numerically simulated, and the flow characteristics inside the shuttle cone tube are obtained in detail. The mechanism of hydraulic separation of water and sediment with shuttle cone tube is revealed. Based on the numerical simulation of the inhomogeneous sand flow field, the distribution of sediment with different particle sizes in the shuttle cone tube and its interception rate are obtained. Thirty shuttle cone tube models with different angle of rotation, inclination of cone ring, dip angle of lower cone tube, position of cone ring and installation position of distribution pipe are established. The flow field in different models is compared and analyzed through two and three dimensional numerical simulation of water and sediment two-phase flow field. The difference and difference of concentration field and its influence on the separation efficiency of water and sediment complement and perfect the principle of structural type optimization of shuttle cone tube and provide guidance for the application of shuttle cone tube in practice and optimization of its operating conditions.
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV149.2
本文编号：2373819
[Abstract]:The shuttle-cone tube turbid fluid separation device is a new type of water-sediment two-phase separation device without adding any chemical agent and external force. In order to supplement and improve the principle of water and sediment separation mechanism and structural pattern optimization, the previous research results of this paper are applied to theoretical analysis. The experimental study and numerical simulation were carried out to study the characteristics of water and sediment two-phase flow field and the optimization principle of structure pattern in a shuttle cone tube. Through two-dimensional numerical simulation of two-phase flow field of water and sediment, the velocity distribution and concentration distribution of sediment static water settlement process in the same size shuttle cone tube and common device are obtained, and the results are analyzed and compared. The reason why the shuttle-cone tube is superior to the common equipment in the separation efficiency of water and sediment is revealed. Through three dimensional numerical simulation, the two-phase flow field of uniform sand and non-uniform sand shuttle cone tube with different inlet flow rate and different inlet concentration are numerically simulated, and the flow characteristics inside the shuttle cone tube are obtained in detail. The mechanism of hydraulic separation of water and sediment with shuttle cone tube is revealed. Based on the numerical simulation of the inhomogeneous sand flow field, the distribution of sediment with different particle sizes in the shuttle cone tube and its interception rate are obtained. Thirty shuttle cone tube models with different angle of rotation, inclination of cone ring, dip angle of lower cone tube, position of cone ring and installation position of distribution pipe are established. The flow field in different models is compared and analyzed through two and three dimensional numerical simulation of water and sediment two-phase flow field. The difference and difference of concentration field and its influence on the separation efficiency of water and sediment complement and perfect the principle of structural type optimization of shuttle cone tube and provide guidance for the application of shuttle cone tube in practice and optimization of its operating conditions.
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV149.2
【参考文献】
相关期刊论文 前10条
1 徐姚,张政,程学文,郑玉贵,柯伟,姚治铭;旋转圆盘上液固两相流冲刷磨损数值模拟研究[J];北京化工大学学报(自然科学版);2002年03期
2 肖尧;施汉昌;范茏;;基于计算流体力学的辐流式二沉池数值模拟[J];中国给水排水;2006年19期
3 张政,谢灼利;流体-固体两相流的数值模拟[J];化工学报;2001年01期
4 曾光明,葛卫华,秦肖生,黄国和,刘鸿亮;数值模拟方法在二维沉淀池优化设计中的应用[J];环境工程;2002年02期
5 李广年;张军;陆林章;张国平;;PIV,LDV在螺旋桨尾流测试中的比对应用[J];航空动力学报;2010年09期
6 陶洪飞;邱秀云;赵丽娜;李琳;;水沙分离鳃内部流场的数值模拟[J];农业工程学报;2013年17期
7 李嘉,罗麟,李克锋,张永泽;紊流场中固体颗粒运动轨迹的Lagrangian模型[J];水动力学研究与进展(A辑);1997年01期
8 张健,NIEH S;涡旋管内强旋湍流气固两相流的数值模拟[J];水动力学研究与进展(A辑);2000年04期
9 倪晋仁,曲轶众;固液两相流中固体颗粒的垂直分选模型[J];水动力学研究与进展(A辑);2003年03期
10 周永,吴应湘,郑之初,刘秋生,李清平;油水分离技术研究之一——直管和螺旋管的数值模拟[J];水动力学研究与进展(A辑);2004年04期
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