A novel test bed has been set up to carry out experimental activities on multiphase flows in the field of fluid power components and systems. The apparatus allows carrying out various experimental investigations, both in stationary conditions and in transitory conditions.
In addition to the analysis of the flow-pressure behavior, the bench is designed to conduct optical diagnosis of the flow of piloting sections, with particular attention to the phenomenon of cavitation, which is visualized with the help of high speed video techniques or with strobo-imaging techniques.
The bench is based on a modular architecture, thanks to which the various functions such as the electric drive, the conditioning and the filtration of the fluid, the high pressure circuit and the flow test sections are inter-connected in a single structure.
The high pressure section is based on the use of two delivery lines, each served by its own pump connected to a couple of independent motors. The lines are designed to perform analyzes both in the absence and in the presence of pressure pulsations.
The management of the automatic bench functions has been implemented on open hardware (Arduino UNO); the main functions concern the automatic management of valves for pressure and flow control, the management of pump speed control and the management of the hydraulic fluid thermoregulation

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