Every change in the velocity of a fluid by deflection, deceleration or acceleration is related to a change in momentum. The change in momentum simultaneously causes a force effect. In practice, this is used, for example, to drive a Pelton turbine.
HM 250.05 contains two interchangeable nozzles, for generating a water jet which hits a deflector. Four different deflectors are available. The water jet generates jet forces at the deflectors, which are measured by a bending beam. A transparent splash guard ensures a clear view of the experiments.
The nozzle pre-pressure is measured via a pressure connection in the inlet of the nozzle. The base module is used to measure flow rate, pressure and force. Thus, the influence of nozzle pre-pressure, different deflection angles, flow velocity as well as flow rate are investigated. The theoretical forces are calculated using the momentum equation and compared with the measured values from the experiments.
The accessory HM 250.05 is easily and securely positioned on the worktop of the HM 250 base module. Via RFID technology the accessories are automatically identified, the appropriate GUNT software is loaded and an automatic system configuration is performed. The intuitive user interface guides through the experiments and displays the measured values graphically. For tracking and evaluation of the experiments, up to 10 external workstations can be used simultaneously using the local network via LAN connection. HM 250 supplies the water and is used to adjust the flow rate.