The HM 250.11 experimental unit can be used to demonstrate the effect of various obstacles on the energy level in the open-channel flow. Fundamentals required for the design of artificial shipping channels or for the regulation of rivers and barrages can be taught on a very small scale.
The experimental flume is made of transparent material so that the water levels and thus the energy levels along the flume can be observed. The effects of the various obstacles are thus clearly visible. The supplied accessories consist of various weirs, a Venturi flume, two piers and obstacles for energy dissipation. The accessories are held to the bottom of the experimental flume magnetically.
At the bottom of water inlet and outlet, the water level in the experimental flume can be determined by pressure measurement. To investigate the hydraulic jump in a supercritical flow, a nozzle is attached at the water inlet into the experimental flume. Using a syringe, water can be sprayed onto the water surface as a point-like exciter and the wave propagation can be observed.
The accessory HM 250.11 is positioned easily and securely 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. The base module supplies the water and is used to adjust the flow rate. The base module is also used to measure the flow rate and pressure.