Hydraulic Power Supply
In the RUAG wind tunnel facility four 420 bar/360 litres per minute hydraulic pumps allow the precise rpm control of the motors within the models. The control system is an in-house developed LabView application and allows multiple precise rpm control by use of motor mounted encoders. The rpm command values can be coupled with wind tunnel speed to prevent overloading of the propeller blades. Safety features, such as rpm and pressure plausibility checks, protect personnel and equipment. Oil temperatures are finely controlled by a massive heat exchanger and heaters to minimize interference effects on nearby instrumentation. A network of pressure, return, and tank lines allow the flexible and safe distribution of high-pressure oil to the wind tunnels and test benches.
A similar hydraulic power supply has recently been delivered by RUAG for use in a high speed wind tunnel.