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Reconstruction of PTB wind tunnel with 320 mm nozzle completed

13.01.2010

PTB´s Eiffel type wind tunnel with a 320 mm nozzle diameter was originally driven by the blower of the gas meter test rig. Now the wind tunnel has been reconstructed into a self-sustaining closed-loop Göttinger type wind tunnel, which can optionally be operated with an open or a closed measuring section.

By assembling the wind tunnel in a separate laboratory in the basement of PTB´s Prandtl Building, improved flow conditions can be realized in an expanded flow velocity range from below 0.5 m/s up to over 60 m/s by means of a new four quadrant controller for the blower of the wind tunnel. Ongoing measurements for the characterization of flow fields in the wind tunnel and the validation of the new facility by comparison measurements with PTB´s 180 mm Eiffel type wind tunnel which was involved in CCM, EURAMET and DKD comparison measurements to date – will broaden the metrological basis for wind tunnel based anemometer calibrations and the assessment of anemometer calibration procedures.

New 320 mm PTB wind tunnel, view of nozzle outlet and open measuring section

Figure 1: New 320 mm PTB wind tunnel, view of nozzle outlet and open measuring section

Contact person:

H. Müller, FB 1.4, AG 1.41, E-mail: harald.mueller@ptb.de