摘要：Pipelines are susceptible to microleakage during operation due to aging and corrosion. Since identifying these leaks using conventional detection methods is difficult, they can gradually expand to cause severe environmental damage and public safety issues. Therefore, acoustic-based microleakage internal detection methods can effectively address this problem. A microleakage flow field and near-sound field models for small-diameter pipelines were constructed based on a hybrid approach of computational fluid dynamics (CFD) and computational aeroacoustics (CAA). The flow field results were interpolated into the sound field grid to determine the change of near-sound field with the flow field. The results of the study show that the leakage acoustic pressure signal was positively correlated with a higher internal pressure in the pipe and the leakage aperture. The amplitude of microleakage acoustic wave was negatively associated with increasing propagation distance. As the frequency of the acoustic wave propagation rose, the acoustic waves in the pipeline displayed dispersion characteristics. A microleakage experimental system based on the acoustic internal detection method was also constructed, and the accuracy of the simulation results was verified through experiments. The research conclusion indicates that the characteristic frequency of microleakage sound wave signal is 1880 Hz. The (1.0) mode sound wave (f10 = 4360 Hz) or plane wave frequencies lower than the (1.0) mode are selected for leakage feature extraction. A theoretical and experimental basis was established for subsequent development of pipeline microleakage internal detector based on acoustic internal detection methods. ? 2025 Taylor ＆ Francis Group, LLC.

ISSN号：1556-7036

卷、期、页：卷47期2

发表日期：2025-12-12

影响因子：0.000000

期刊分区（SCI为中科院分区）：四区

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：Energy Sources, Part A: Recovery, Utilization and Environmental Effects

参与作者：Ma, Yundong,Li, Wei,Bi, Caixia

第一作者：董绍华,魏昊天,徐晴晴

论文类型：期刊论文

论文概要：Ma, Yundong,Li, Wei,Bi, Caixia,董绍华,魏昊天,徐晴晴，Simulation and experimental research on acoustic energy propagation mechanism of microleakage in liquid small diameter Pipelines，Energy Sources, Part A: Recovery, Utilization and Environmental Effects，2025，卷47期2

论文题目：Simulation and experimental research on acoustic energy propagation mechanism of microleakage in liquid small diameter Pipelines