不同尺寸管道中细颗粒的沉积运动规律研究

摘要：研究不同尺寸管道中颗粒物的运动沉积情况，对于采用合理管道，以减少管道中的颗粒物具有重
要价值。利用流体分析软件模拟不同尺寸管道内水介质中细颗粒物的沉积运动规律，得出管道尺寸对
细颗粒物沉积运动的影响。结果表明：流体在管道中流动的过程中，壁面附近的流体流速低于管道内部
流体流速，壁面附近的压力高于管道内部；流体在管道运动过程中，逐渐发展完全,压力与流速在后半段
文章标志码：A
文章编号：0258-0918(2019)05-0695-06
Study on sedimentation movement of fine particles in pipelines of different sizes
ZHU Liangyu1>2>3,, ZHOU Tao12 3 * QIN Xuemengb2>3, DING Xijia1>2>3, ZHANG Jialei1>2>3
3. Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy, North China Electric Power University, Beijing> 102206, China)
Abstract: Studying the movement and deposition of particulate matter in pipes of differ­ ent sizes is of great value for adopting reasonable pipes to reduce particulate matter in pipes. The fluid analysis software is used to simulate the deposition movement of fine particles in water medium in pipes of different sizes, and the influence of pipe size on the deposition movement of fine particles is obtained. The results show that in the process of fluid flowing in the pipeline, the fluid flow velocity near the wall flour is lower than
趋于稳定。在管道直径一定ቤተ መጻሕፍቲ ባይዱ情况下，颗粒物沉积率随管道长度增大而增大;在管道长度一定的情况
下，颗粒物沉积率随管道直径增大而减小；当管道长度较短且管道直径较大时，颗粒物沉积现象不明显；
当管道管径同时变化时,对颗粒物沉积产生综合影响，变化规律非线性。
关键词：尺寸；管道;颗粒物;沉积;浓度
中图分类号：TL48
第39卷第5期 2019年］0月
核科学与工程 Nuclear Science and Engineering
Vol. 39 No. 5 Oct. 2019
不同尺寸管道中细颗粒的沉积运动规律研究
朱亮宇周涛1，2,3，* ,秦雪猛1，2,3, 丁锡嘉1,2,3,张家磊1,2,3
(1.华北电力大学核科学与工程学院，北京102206;2.华北电力大学核热工安全与标准化研究所，北京102206; 3.华北电力大学非能动核能安全技术北京市重点实验室，北京102206)
(1. School of Nuclear Science and Engineering, North China Electric Power University, Beijing, 102206, China; 2. Institute o£ Nuclear Thermal-hydraulic Safety and Standardization.» North China Electric Power University, Beijing, 102206, China；
收稿日期=2019-04-17 基金项目：国家重点研发计划(412010106),北京市自然科学基金(3172032) 作者简介:朱亮宇(1995—)男，浙江温州人，硕士研究生，现从事热工水力与安全方面研究 通讯作者：周 涛：zhoutao@ ncepu. edu. cn
695
the fluid flow velocity inside the pipeline, and the pressure near the wall flour is higher than that inside the pipeline. During the movement of the pipeline? the fluid gradually develops completely? and the pressure and flow rate tend to stabilize in the second half. When the pipe diameter is fixed? the particle deposition rate increases with the pipe length. When the pipe length is fixed, the particle deposition rate decreases with the pipe diameter increasing. When the pipe length is short and the pipe diameter is large? the particle deposition phenomenon is not obvious. When the pipe diameter changes at the same time? it will have a comprehensive impact on particle deposition, and the change rule is nonlinear. Key words: Size； Pipelines； Particulate matter； Deposits； Concentration