From the outset, Vectoflow has worked with leading R&D institutes and universities in Europe and around the world to stay technologically one step ahead in instrumentation and measurement applications and to push existing boundaries. Our goal is to develop innovative solutions to provide our customers with superior technologies.
In order for a flow probe to achieve its measurement accuracy, it must be calibrated. Vectoflow has its own wind tunnel for this purpose.
A prerequisite for reliable measurement results is professional calibration of the probes. During calibration, the relationship between the applied pressure and the measured speed is defined. To do this, the probe is held in a known flow field generated by a wind tunnel. The pressures at different measuring points are determined by rotating and changing the angle of attack of the probe. The calibration factors of the probe can be calculated from these. If the probes are then held in an unknown flow field, the unknown speed of this flow can be determined based on the measured pressure and the previously determined calibration factors.
The basis of every calibration is the best possible free jet - a constant, homogeneous air flow with low turbulence. A 90 kW asynchronous motor drives 2 radial compressors via a belt drive. The compressed air is passed through several sieves and rectifiers in a settling chamber to homogenize it. Various nozzles with a special geometry optimized for low pressure loss accelerate the compressed air again. This allows speeds between Mach 0,012 (4 m/s ISA) and Mach 0,99 (337 m/s ISA) to be generated. The probes are positioned precisely to 2° by a 0,05-axis traverse (roll and yaw angle) and are thus calibrated in the speed and angle range defined by the customer.
