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FRAP Pro – Unsteady flow measurement systems

FRAP Pro is Vectoflow’s transient flow probes that combine the robustness of pressure probes (e.g. 5-hole probes) with a high temporal resolution of the pressure signal. Depending on the probe geometry, frequencies in the kHz range can also be measured.

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Product Details

Vectoflow's unsteady probes make it possible to record high-frequency flow phenomena in the kHz range, not just for one measured variable, but for all measured variables that are also available with a conventional multi-hole probe: speeds, flow angles, total and static pressure, Mach number and density. In order to achieve this high temporal resolution, the pressure sensors must be located as close to the probe head as possible in order to keep the modulation of the pressure fluctuations in amplitude and phase as low as possible. In addition, this modulation must be determined experimentally, which is done at Vectoflow using a frequency calibration test bench specially developed for this purpose. Of course, all the advantages of stationary probe hardware are also available for the unsteady probes, such as the high geometric flexibility and increased robustness of the probes, see also geometry and material combinations. These advantages are possible by using our optimized additive manufacturing process.
Transient probes benefit from the same advantages as stationary probe hardware, including high geometric flexibility and enhanced robustness, facilitated by Vectoflow's optimized additive manufacturing process. This process allows for customizable geometry and material combinations, ensuring optimal performance in dynamic flow environments. Vectoflow offers comprehensive solutions for measuring unsteady flow phenomena, including:

  • Complete system for measuring unsteady flow phenomena
  • Probes with embedded pressure sensors (higher frequency response) or conventional probes with external pressure sensors
  • Frequency calibration of each pressure channel
  • Data acquisition hardware
  • Software for data analysis

It is also possible to synchronize the measurement with several measuring systems or to trigger measurements using a trigger signal.

Specifications

Probe type

4-, 5-hole probe

Length Max.

according to customer requirements

Tip diameter min.

Standard 3-4mm

Tip geometry

Cone, hemisphere, faceted

Material

Stainless steel, titanium, Inconel, aluminum, plastics and much more.

Interface/Installation

Square, hexagon, flattened cylinder or upon request

Reference

Reference surface normal to the Z axis

Temperature range

up to 100°C (higher with water cooling)

Measuring accuracy angle

<±1°

Angle measuring range

± 60 °

Speed ​​measurement range

from 3 m/s to Mach 1

Measuring accuracy speed

<1 m/s or <1% FS, whichever is greater

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Contact

Zeppelinstr. 16
82205 Gilching
Germany
+49 89 124149570Email info@vectoflow.de
Vectoflow GmbH Tüv ​​Seal
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