A theoretical study on the attenuation model of leakage acoustic waves for natural gas pipelines
LIU Cuiwei1，JING Huafei1，FANG Liping2，XU Minghai1
1.College of Pipeline and Civil Engineering in China University of Petroleum (East China), Qingdao 266580, China;
2.College of Chemistry and Chemical Engineering in Qinzhou University, Qinzhou 535011, China
Studies on the propagation model for natural gas pipelines have not been considered thoroughly.When the propagation characteristics are studied, the influences of gas flow on the attenuation model were not consideration.Therefore, the propagation equation was deduced in the gas pipelines.The amplitude attenuation models were established in theory and in experiments.Firstly, the theoretical attenuation model was established in the viscous flow with uniform velocity considering gas flow, turbulent effect and viscothermal effect.Then the attenuation factors were calculated in experiments and in theory in 10 mm gas pipelines.When the original signals were processed, the upstream errors calculated in theory were less than 6.0%.When the wavelet transform (WT) signals were processed, the upstream errors calculated in theory were less than 7.0% while the downstream ones were less than 12.0%.And the reasons for the errors were analyzed.The results show that the established attenuation model can be verified by the experiments.
刘翠伟1，敬华飞1，方丽萍2，徐明海1. 输气管道泄漏声波衰减模型的理论研究[J]. 振动与冲击, 2018, 37(20): 109-114.
LIU Cuiwei1，JING Huafei1，FANG Liping2，XU Minghai1. A theoretical study on the attenuation model of leakage acoustic waves for natural gas pipelines. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(20): 109-114.
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