摘要：Flanges serve as the sealing and connecting components in nuclear power plant pipelines and pressure vessels. The contact gaps between flanges and gaskets can lead to flange sealing failure. Therefore, optimal flange sealing surfaces are essential for ensuring the safety and reliability of airtight pipeline systems. This paper examined the flange sealing surfaces in a nuclear power plant. A sealing contact model was established according to the characteristic parameters of the surface contours measured during the experiment, while the finite element method was used to determine the sealing contact characteristics and predict the leakage of the rough sealing contact surface. The results indicated that the surface roughness had a multi-scale effect while the sealing state was related to the sealing characteristics scale. The sealing surface morphology, material properties, and operational conditions directly affected the sealing interface structure and sealing performance. In addition, the contact clearance of the sealing surface decreased in conjunction with increased applied load, normal compression displacement, and surface roughness, while the surface leakage rate increased at a higher surface contact clearance and pipeline conveying pressure. ? 2025 Elsevier B.V.

ISSN号：0029-5493

卷、期、页：卷432

发表日期：2025-02-01

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Nuclear Engineering and Design

参与作者：王东营,董秀娟,潘彪,刘权

通讯作者：李凤,徐鲁帅

第一作者：董绍华

论文类型：期刊论文

论文概要：李凤,徐鲁帅,董绍华,王东营,董秀娟,潘彪,刘权，Multi-scale contact characteristics and leakage prediction of flange seal based on fractal geometry，Nuclear Engineering and Design，2025，卷432

论文题目：Multi-scale contact characteristics and leakage prediction of flange seal based on fractal geometry