![]() The display unit shows the pressures at the tappings. Pressure tappings along the working section connect to a ‘mimic’ panel and multi-pressure display unit in the instrument frame. An encoder works with the optional VDAS to measure the model angle. A geared mechanism allows students to adjust the incidence angle of the models. ![]() These fit in the ‘portal’ of the working section, flush to both windows. Included are three different shaped liners.Ī selection of models are included with the equipment (one has pressure tappings) for experiments in two-dimensional flow. The shape of the liner controls the maximum air velocity at the divergent part of the working section. The working section of the wind tunnel is a convergent/divergent nozzle with a removable top part (‘liner’). This is useful for start-up and shutdown and for subsonic tests. A bypass duct, with a hand-operated valve, allows the operator to reduce the air flow through the working section, without disturbing the quality of the main air flow. The pump creates low pressure downstream of the working section to draw air into the wind tunnel. It also allows students to study air flow in two dimensions around aerodynamic models.An instrument frame (supplied) holds a remote-control unit that controls a high-capacity vacuum pump (supplied). A suction-type continuous-operation supersonic wind tunnel for investigations into subsonic and supersonic air flow.
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