Determination of Pressure Wave Propagation Velocity in Closed Hydraulic Pipes

This research paper focuses on determining the pressure wave propagation velocity in closed hydraulic pipes, a fundamental parameter relevant to a wide range of engineering applications, from aerospace to land-based and marine systems. It was indicated that, under transient conditions, the pressure wave propagation velocity depends, among other factors, on temperature, pressure, and the substitute bulk modulus. Furthermore, it was also indicated that accurate knowledge of this velocity is crucial for predicting pressure amplitudes during transient flows, including water-hammer phenomena. Finally, the analysis indicated that excessive pressure amplitudes in the pipe can lead to critical damage to the pipeline and increased vibration. Experimental investigations were carried out to determine the pressure wave propagation velocity in flexible steel-braided pipes and in a rigid pipe over a wide range of internal pressures.