测试科学与仪器2021，Vol.12Issue(2)：146-153,8.DOI:10.3969/j.issn.1674-8042.2021.02.003
管道不可压缩流体泄漏量与压力变化的关系研究
Research on relationship between leakage of incompressible fluid and pressure change in pipeline
杨丽 1曾周末 1封皓 1贺永方 2高潮2
作者信息
- 1. 天津大学 精密测试技术及仪器国家重点实验室,天津 300072
- 2. 天津精仪精测科技有限公司,天津 300000
- 折叠
摘要
Abstract
In practical engineering,only pressure sensors are allowed to install to detect leakage in most of oil transportation pipelines,while flowmeters are only installed at the toll ports.For incompressible fluid,the leakage rate and amount cannot be accurately calculated through critical pressure conditions.In this paper,a micro-element body of the pipeline was intercepted for calculation.The relationship between radial displacement and pressure of pipe wall was studied based on the stress-strain equation.Then,the strain response of pipeline volume with pipeline pressure was obtained.The change in volume expansion of pipeline was used to characterize leakage of incompressible fluid. Finally, the calculation model of leakage amount of incompressible fluid was obtained.To verify the above theory,the pipeline expansion model under pressure was established by COMSOL software for simulation.Both simulation results and deduction equations show that the volumetric change has a quadratic parabolic relationship with the change of pipeline pressure. However, the relationship between them can be approximately linear when the pressure change is not too large.In addition,the leakage of incompressible fluid under the pressure of 0 MPa-0.8 MPa was obtained by experiments.The experimental results verify the linear relationship between leakage of incompressible fluid and the change of pipeline pressure.The theoretical and experimental results provide a basis for the calculation of leakage of incompressible fluid in the pipeline.关键词
不可压缩流体/体积应变/有限元仿真/压力梯度/泄漏量Key words
incompressible fluid/volumetric strain/finite element simulation/pressure gradient/leakage引用本文复制引用
杨丽,曾周末,封皓,贺永方,高潮..管道不可压缩流体泄漏量与压力变化的关系研究[J].测试科学与仪器,2021,12(2):146-153,8.
