Experimental analysis Measure and visualize flows

Analyzing and understanding the flow behaviour in components and machines often involves experimental tests. The flexibly equipped hydraulic laboratory provides an optimal platform for investigating a wide range of flow phenomena, allowing for flow visualization and the collection of measurement data using a range of facilities. Such measurement data is also used to verify and/or supplement CFD applications. 

Wirbel

Test rigs for research and teaching

Measurement technology and instrumentation

Hydraulic laboratory

Especially in areas where numerical computation is still in its infancy, such as the prediction of flow instabilities, fluid/structure interactions, or multiphase flows (including sprays) experimental techniques are usually essential. For this purpose, CC FNUM has a well-equipped hydraulic laboratory at its disposal. With a wide variety of measuring equipment, it is possible to record and evaluate many parameters of flow phenomena.

The hydraulic laboratory in detail:
Floor area 18 x 27 m; water reservoir 625 m3.

For the investigation of components in water with free surface:
- Concrete channel: Length 14 m, width 1 m, max 1 m depth with over-fall.
- Plexiglas channel: Length 6 m, width 1 m, max 60 cm depth

For the investigation of components in a pipe flow:
In the existing test lines (ø 500 / 250 / 150 / 100 / 50 mm) the flow rates are determined with magnetic inductive flowmeters (MID).  The pipe circuits can be flexibly connected to different components/consumers.

Feeding of the test circuits:
- 2 high-pressure pumps: Qn = 70l/s / Hn = 130 m / Qmax = 160 l/s (parallel) / Hmax = 160 m
- Pump turbine: Pumping mode: Qmax = 180 l/s / Hmax = 35 m, Turbine mode: Qmax = 80 l/s
- Rütschi pump: Qmax = 1'000 l/s / Hmax = 9.5 m
- Div. smaller pumps
- 1 tank (7 m3) with integrated and adjustable overflow for constant head
- 1 calibration tank (6 m3) for calibration of flow sensors (up to 150 l/s)