Abstract
The industrial pipes are designed and manufactured with different materials and wall thicknesses according to their applications, especially the medium inside. The gas-liquid two-phase flow is common inside these industrial pipes and the scaling phenomenon is also inevitable during their operation. This paper investigates the influence of pipe material and wall thickness on the descaling process using leaky ultrasonic guided waves (LUGWs), by combining the finite element method and the bubble dynamics equation. Theoretical models and experimental results show that: the descaling effectiveness follows the order PVC > PE > PPH > PPR for different pipe materials, by comparing the calcium removal rates at 50cm and 80cm in these pipes with different materials. For the same material (PVC investigated) but with different wall thickness, the descaling effectiveness increases with wall thickness. These results indicate that the descaling effect of pipeline LUGW is affected by the pipe material, and increasing the wall thickness will further improve its efficiency.
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