Hydraulic Transient attenuation by HDPE backward configuration Technique

Abstract

Abstract Hydraulic transients pose a significant threat to pressurized conduits, and their occurrence is commonplace in industrial pipelines throughout their operational lifespan. The potential for catastrophic damage resulting from hydraulic transient events has compelled researchers to explore effective techniques for mitigating their severity. This paper presents the findings of an experimental study aimed at investigating the efficacy of employing a high-density polyethylene (HDPE) bypass as a hydraulic transient mitigation strategy. The configured HDPE bypass is designed to allow backward flows while restraining forward flows. The study encompasses various transient conditions, with measurements recorded at different locations along the pipeline. The investigated hydraulic transient scenarios include pump trip-induced transients, end valve closure transients, and simultaneous pump and valve closure-induced transients. Furthermore, the performance of the HDPE backward configuration technique is compared with that of the air vessel technique. In conclusion, the experiments reveal that the HDPE backward configuration technique proves to be an effective strategy for attenuating transient pressure waves in hydraulic systems. Notably, the HDPE technique outperformed the air vessel technique in several experimental conditions. Additionally, the combined use of the HDPE and air vessel techniques demonstrated superior performance compared to each technique individually across all measured locations and under various transient conditions.