Abstract
For the effective evaluation of hydraulic conditions of pipeline system, it is necessary to evaluate not only the material properties but also unsteady flow conditions, such as pressure wave. In this study, quantitative evaluation of pressure wave is going to be performed, applying acoustic emission (AE) and digital image correlation methods in pipeline. The pressure waves were detected in pipeline, based on control of valve closing time (0.40-10.48s). Thus, the maximum pressure could be detected by comparing maximum pressure level with a rate of AE generation, which is analyzed by AE parameters. Using digital image correlation method, a relationship between maximum pressure level and displacement is correlated. By monitoring the pressure waves in service pipeline based on these results, the generated pressure waves in pumping flow conditions is successfully detected by AE.
