Towards higher accuracy and better frequency response with standard multi-hole probes in turbulence measurement with remotely piloted aircraft (RPA)
This study deals with the problem of turbulence measurement with small remotely piloted aircraft (RPA). It shows how multi-hole probes (MHPs) can be used to measure fluctuating parts of the airflow in flight up to 20 Hz. Accurate measurement of the transient wind in the outdoor environment i...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2014-04-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | http://www.atmos-meas-tech.net/7/1027/2014/amt-7-1027-2014.pdf |
| Summary: | This study deals with the problem of turbulence measurement with
small remotely piloted aircraft (RPA). It shows how multi-hole
probes (MHPs) can be used to measure fluctuating parts of the
airflow in flight up to 20 Hz. Accurate measurement of the
transient wind in the outdoor environment is needed for the
estimation of the 3-D wind vector as well as turbulent fluxes of heat,
momentum, water vapour, etc. In comparison to an established MHP
system, experiments were done to show how developments of the system
setup can improve data quality. The study includes a re-evaluation
of the pneumatic tubing setup, the conversion from pressures to
airspeed, the pressure transducers, and the data acquisition
system. In each of these fields, the steps that were taken lead to
significant improvements. A spectral analysis of airspeed data
obtained in flight tests shows the capability of the system to
measure atmospheric turbulence up to the desired frequency range. |
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| ISSN: | 1867-1381 1867-8548 |