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具有不同焊接结构的喷嘴流量计的热应力和热变形

Thermal stress and thermal deformation of a nozzle flowmeter with different weld structures.

作者信息

Jiang Hai-Bing, Yang Ze-Zhou, Zhang Yu-Liang, Xu Xiao-Wei, Zhao Yan-Juan

机构信息

College of Mechanical Engineering, Quzhou University, Quzhou, China.

College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China.

出版信息

PLoS One. 2025 Jun 16;20(6):e0324780. doi: 10.1371/journal.pone.0324780. eCollection 2025.

DOI:10.1371/journal.pone.0324780
PMID:40522982
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12169550/
Abstract

Nozzle flow meters are widely used in the field of measuring high temperature media. In order to investigate the effect of nozzle flowmeter weld structure on thermal stress and thermal deformation, 10 different weld structures were designed in terms of the distance between the weld metal and the eight-groove nozzle, the width of the bottom of the weld metal, the taper angle of the weld metal, and the opening of the taper angle of the weld metal. The thermal stress and thermal deformation characteristics of the solid domain of the nozzle flowmeter are also calculated numerically for a high temperature case. The conclusion indicates that with the increase of the conical Angle of the weld metal, the thermal stress at the inlet and outlet of the nozzle flowmeter gradually decreases, and the thermal deformation changes less. The distance between the weld metal of the nozzle flowmeter and the eight-slot nozzle, the width below the weld metal, and the variation of the cone angle opening of the weld metal all have a relatively small impact on the thermal stress and deformation of the overall solid domain of the nozzle flowmeter.

摘要

喷嘴流量计在高温介质测量领域有着广泛应用。为研究喷嘴流量计焊接结构对热应力和热变形的影响，从焊缝金属与八槽喷嘴之间的距离、焊缝金属底部宽度、焊缝金属锥角以及焊缝金属锥角开口等方面设计了10种不同的焊接结构。针对高温工况，还对喷嘴流量计实体域的热应力和热变形特性进行了数值计算。结论表明，随着焊缝金属锥角的增大，喷嘴流量计进出口处的热应力逐渐减小，热变形变化较小。喷嘴流量计焊缝金属与八槽喷嘴之间的距离、焊缝金属下方宽度以及焊缝金属锥角开口的变化对喷嘴流量计整体实体域的热应力和变形影响相对较小。

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