基于流-热-固耦合分析的数值模拟及结构优化  

Numerical Simulation and Structural Optimization Based on Fluid-Thermal-Solid Interaction Analysis

作　　者：孙林 张秀珩[1] 温丹阳 刘佳音 SUN Lin;ZHANG Xiu-heng;WEN Dan-yang;LIU Jia-yin(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110000,China)

机构地区：[1]沈阳理工大学机械工程学院,辽宁沈阳110000

出　　处：《压缩机技术》2024年第3期11-16,共6页Compressor Technology

摘　　要：为解决等径T型管路应力过大问题,提出一种基于流-热-固耦合分析方法的优化方法对等径T型管结构进行优化。首先,基于流、固力学理论建立T型管多场耦合的数学模型和物理模型,对T型管内流体的速度温度变化情况和管路的等效应力的分布情况进行仿真模拟,在仿真结果的基础上对管路进行结构优化。仿真结果表明:冷热流体的压力差会导致流体产生逆流现象,从而导致管路的上游区等效应力值增大。等径T型管的最大等效应力值出现在主支管交汇的下游内壁面处。优化后管路内壁面最大等效应力值下降约14%,可以有效地延长管路的使用寿命。该方法对提高气体管路设计的可靠性具有一定的实践意义。In order to solve the problem of excessive stress in equal-diameter T-pipe,an optimization method based on flow-thermal-solid interaction analysis method is proposed to optimize the structure of equal diameter T-tubes.Firstly,based on the theory of flow and solid mechanics,the mathematical model and physical model of multi-field coupling of T-shaped tube are established,and the velocity and temperature changes of the fluid in the T-tube and the distribution of equivalent forces of the pipeline are simulated,and the structure of pipeline is optimized on the basis of simulation results.The simulation results show that the pressure difference of the hot and cold fluid will lead to the countercurrent phenomenon of the fluid,which leads to the increase of the equivalent stress value in the upstream region of pipeline.The maximum equivalent stress value of the equal diameter T-pipe appears at the downstream inner wall where the main branch pipes meet.After optimization,the maximum equivalent stress value of the inner wall of pipeline is reduced by about 14%,which can effectively extend the service life of pipeline.This method has certain practical significance for improving the reliability of gas pipeline design.

关 键 词：流-热-固耦合分析 等径T型管 数值模拟 结构优化:仿真分析 

分 类 号：TE832[石油与天然气工程—油气储运工程]