MR-HM 170 Open wind Tunnel Teaching Equipment Hydraulic Workbench Description • open wind tunnel for a variety ofaerodynamic experiments • homogeneous flow through theflow straightener and specialnozzle contour • transparent measuring section
A wind tunnel is the classic experimentsystem for aerodynamic flow experiments. The model being studied remainsat rest while the flow medium is set inmotion, and thus the desired flowaround the model is generated. MR-HM 170 is an “Eiffel” type open windtunnel used to demonstrate and measure the aerodynamic properties of various models. For this purpose, air isdrawn in from the environment and accelerated. The air flows around a model,such as an aerofoil, in a measuring section. The air is then decelerated in a diffuser and pumped back into the open bya fan. The carefully designed nozzle contourand a flow straightener ensure a uniform velocity distribution with little turbulence in the closed measuring section. The flow cross-section of the measuringsection is square.
The built-in axial fan with outlet guidevane system and a variable-speed driveis characterised by an energy-efficientoperation at high efficiency. Air velocitiesof up to 28m/s can be reached in thisopen wind tunnel. The trainer isequipped with an electronic two-component force sensor. Lift and drag are detected and displayed digitally. The airvelocity in the measuring section is displayed on the inclined tube manometer. The tube manometers MR-HM 170.50 orthe electronic pressure measurementMR-HM 170.55 are recommended formeasuring the pressure distribution onbodies. By using the system for data acquisitionMR-HM 170.60, the measured values forvelocity, forces, moment, displacement/angle, and differential pressurecan be transferred to a PC where theycan be analysed with the software. Extensive accessories allow a variety ofexperiments, for example lift measurements, pressure distributions, boundarylayer analysis or visualisation of streamlines.
Learning objectives/experiments • experiments with accessories · determine drag and lift coefficientsfor different models · pressure distribution on bodies immersed in a flow · boundary layer analysis · investigation of flutter · wake measurement • in conjunction with the fog generatorMR-HM 170.52 · visualisation of streamlines
Specification [1] experiments from the field of aerodynamics and fluid mechanics with an “Eiffel” type wind tunnel [2] wide range of accessories available [3] transparent, closed measuring section [4] inlet contour, nozzle and diffuser made of GRP [5] variable-speed fan motor for energy-efficient operation [6] flow straightener reduces turbulence [7] electronic two-component force sensor for measuring the flow forces [8] inclined tube manometer for displaying the air velocity [9] digital display of drag and lift [10] display of measured values for velocity, forces, moment, displacement/angle, and differential pressure using system for data acquisition MR-HM 170.60
Technical data Measuring section • flow cross-section WxH: 292x292mm • length: 420mm • wind velocity: 3,1…28m/s Axial fan • power consumption: 2,2kW