异型变径高压喷气管的数值模拟  

Numerical Simulation of High Pressure Jet Tube with Abnormal Shape and Variable Diameter

作　　者：邓燕华[1,2] 邓龙龙 涂群岚[2] 徐典[4] 罗珺[2] 

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]江西建设职业技术学院土木系,南昌330200 [3]江西海航建设科技有限公司,南昌330200 [4]重庆科技学院建筑工程学院,重庆401331

出　　处：《南水北调与水利科技》2014年第3期108-111,126,共5页South-to-North Water Transfers and Water Science & Technology

摘　　要：异型变径管近年来得到广泛应用,但管道复杂的应力分布也为设计和施工带来诸多难题。实际使用中常出现管道开裂现象,造成停水停电等诸多不利影响,所以设计和施工前有必要进行计算机仿真分析。利用FLUET有限元分析软件对异型变径管进行模拟,研究了在常流和非定常流情况下管道内部流体速度和压强的分布情况。模拟结果表明,定常流变径管中部流体速度最大,压强最小;非定常流在入口变径过渡段1/3处,压强最大;在入口段,压强是先小后大再小,出口处是先大后小再大。The tube with abnormal shape and variable diameter has been widely used recently,but it has a complex stress distribution in the pipeline which has bought a lot of problems for engineering design and construction.Cracking often occurs in the pipeline in the practical applications,resulting in adverse effects such as cutting off water and electricity supply,so it is necessary to carry out numerical simulation analysis before design and construction.In this paper,the finite element analysis software FLUENT was used to simulate the distribution of fluid velocity and pressure in the tube with abnormal shape and variable diameter under the steady and unsteady flow conditions.The simulation results showed that the middle section of the tube has the maximum fluid velocity and minimum pressure under steady flow conditions,the one-third transition section in the entrance has the maximum pressure under unsteady flow conditions,and the pressure varies from small to large to small in the entrance section and varies from large to small to large in the exit section.

关 键 词：异型变径管 高压喷管 边界条件 压强分布 数值模拟 

分 类 号：TV134[水利工程—水力学及河流动力学]