Pneumatic Pressure Probes
Field of Application
- Flow field measurement of total, static and dynamic pressure
- Determination of the velocity vector
Principle of Measurement
Total pressure is measured using a pitot tube. The static pressure can be measured with a small wall tapping. The difference between the total and the static pressure is the dynamic pressure.
At the Institute different types of pressure probes are used. The spectrum ranges from simple pitot tubes for total pressure measurement to different types of multi-hole pressure probes to determine velocity vectors in the flow field. Furthermore combined pressure and temperature rakes are used to take many separate simultaneous readings of a cross section. For velocity vector measurements rakes can also be equipped with multi-hole heads.
Over time due to many research projects the Institute was able to build up extensive experience in developing, manufacturing and using pneumatic pressure probes. Traverse units are used to position the probes at the measurement points within the flow field. The probes can be calibrated in the high speed calibration wind tunnel available at the institute. In recent years numerical calibration methods have also been developed.