Abstract:

Leak detection has been an important aspect of pipeline operation and management，and real-time simulation has become one of the mostly adopted approaches.The quasi-steady hypothesis commonly adopted in pipeline transient model has the drawback of under-estimating the transient energy loss which will cause relatively big errors between the calculated and measured values.In this paper the recent results on the topic of energy loss was reviewed and its impact on the simulation results was studied based on the data collected from real pipelines.Real-time simulation results showed that the outputs of the unsteady wall shear stress model and leak detection based on this model had higher precision.

Key words:

管道, 瞬变流, 切应力, 仿真, 泄漏检测

摘要：

管道泄漏检测是管道安全管理的重要方面，基于实时仿真的泄漏检测方法是管道泄漏检测的技术路线之一。传统的瞬变流模型采用拟定常假设，对管道内的能量衰减描述不够准确，易导致模型的预测值和测量值出现较大偏差。本文在总结管道模型进展基础上，研究瞬变流能量损耗对仿真的影响和基于瞬变流模型的泄漏检测方法。结果表明，采用瞬变切应力模型能够更准确地描述管道内的能量衰减，更好地实现基于模型的泄漏检测。

关键词:

管道, 瞬变流, 切应力, 仿真, 泄漏检测