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High-Speed Calibrating Wind Tunnel

High-Speed Calibrating Wind Tunnel

The Institute of Turbomachinery and Fluid Dynamics carries out extensive experimental studies on different types of turbomachines. Pneumatic and temperature probes are used for most studies.

Field of Application

  • Probe calibration

Description

To use probes, it is necessary to regularly calibrate them in an open-jet wind tunnel with a known flow field and detailed knowledge of the position of the probe within the flow field. The high-speed calibration channel allows the calibration of pneumatic probes in a range of Mach numbers from 0.3 to 0.9 and for temperature probes in a temperature range from 30 °C to 90 °C. The positioning of the probe, the temperature and the Mach number are controlled via one computer/interface. Due to the compact set-up, it is possible to calibrate probes quickly and at low costs. In order to increase the accuracy of the yaw angle measurements, the probes can also be calibrated in conjunction with a probe-adjusting device of the original experimental set-up.

Picture - Overview of the entire high-speed calibration channel, from left to right: heat exchangers, air filters, free-stream section Picture - Overview of the entire high-speed calibration channel, from left to right: heat exchangers, air filters, free-stream section Picture - Overview of the entire high-speed calibration channel, from left to right: heat exchangers, air filters, free-stream section
Overview of the entire high-speed calibration channel, from left to right: heat exchangers, air filters, free-stream section
Picture - Slow flow in the free-stream section of the high-speed calibration channel, visualized by oil mist in a laser light sheet Picture - Slow flow in the free-stream section of the high-speed calibration channel, visualized by oil mist in a laser light sheet Picture - Slow flow in the free-stream section of the high-speed calibration channel, visualized by oil mist in a laser light sheet
Slow flow in the free-stream section of the high-speed calibration channel, visualized by oil mist in a laser light sheet
Picture - Probe-adjusting device in the free-stream section Picture - Probe-adjusting device in the free-stream section Picture - Probe-adjusting device in the free-stream section
Probe-adjusting device in the free-stream section

Measurement Techniques

  • Calibration of pneumatic and temperature probes
  • Stationary and transient pressure measurement technology: DMT and Kulites
  • Temperature measurement technology: thermocouples type K and resistance thermometers type Pt100

Specifications

Nozzle diameter 60 mm
Mach number range 0,3 - 0,9
Temperature range30 - 90 °C
Probe shaft diameter max. 8 mm
Pitch angle ±45°
Positioning accuracy of the pitch angle 0,05°
Yaw angle ±150°
The positioning accuracy of the yaw angle is dependent on the probe adjustment device used

Contact

Non-public person