Abstract
The University of Defence in Brno has a new low-speed wind tunnel. In order to confirm the quality of the wind inside of the measurement section, several measurements of the dynamic pressure have been performed with the Pitot-static tube. The pressure fields are then analysed and quality of the field is evaluated. Measurement of a pressure drop on the body of a standing helicopter was conducted.
Highlights
A new low-speed wind tunnel of return-flow type with an open measurement section was built at the University of Defence
Due to the relatively low values of Reynolds number achieved, the wind tunnel is ideal for e.g. testing the flight performance of small UAVs, which can be measured in scale of 1:1
The dynamic pressure ݍ is related to the reference pressure ݍ, which is measured at the geometrical centre of the measured cross section area
Summary
A new low-speed wind tunnel of return-flow type with an open measurement section was built at the University of Defence. Due to the relatively low values of Reynolds number achieved, the wind tunnel is ideal for e.g. testing the flight performance of small UAVs, which can be measured in scale of 1:1. If the wind tunnel is to be used to measure flight performance of the small UAVs, which almost exclusively relay on the propeller as a source of thrust, non-uniform velocity along the freestream could significantly influence the measured results. The wind tunnel is equipped with vanes in all corner sections of the tunnel. The flow fluctuation will be investigated in the close future
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