MR-HM 170 Open wind Tunnel educational equipment vocational education training equipment fluid mechanics laboratory equipment Description
• open wind tunnel for a variety of aerodynamic experiments
• homogeneous flow through the flow straightener and special nozzle contour
• transparent measuring section
A wind tunnel is the classic experiment system for aerodynamic flow experiments. The model being studied remains at rest while the flow medium is set in motion, and thus the desired flow around the model is generated.
MR-HM 170 is an “Eiffel” type open wind tunnel used to demonstrate and measure the aerodynamic properties of various models. For this purpose, air is drawn 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 by a fan. The carefully designed nozzle contour and a flow straightener ensure a uniform velocity distribution with little turbulence in the closed measuring section.
The flow cross-section of the measuring section is square.
The built-in axial fan with outlet guide vane system and a variable-speed drive is characterised by an energy-efficient operation at high efficiency. Air velocities of up to 28m/s can be reached in this open wind tunnel. The trainer is equipped with an electronic two-component force sensor. Lift and drag are
detected and displayed digitally. The air velocity in the measuring section is displayed on the inclined tube manometer.
The tube manometers MR-HM 170.50 or the electronic pressure measurement MR-HM 170.55 are recommended for measuring the pressure distribution on bodies.
By using the system for data acquisition MR-HM 170.60, the measured values for velocity, forces, moment, displacement/angle, and differential pressure can be transferred to a PC where they can be analysed with the software.
Extensive accessories allow a variety of experiments, for example lift measurements, pressure distributions, boundary layer analysis or visualisation of streamlines.
Learning objectives/experiments
• experiments with accessories
· determine drag and lift coefficients for different models
· pressure distribution on bodies immersed in a flow
· boundary layer analysis
· investigation of flutter
· wake measurement
• in conjunction with the fog generator MR-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
Measuring ranges
• force:
· lift: ±4N
· drag: ±4N
• velocity: 3,1…28m/s
• angle: ±180°
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase; 230V, 60Hz, 3 phases
UL/CSA optional
LxWxH: 2870x890x1540mm
Weight: approx. 250kg
Scope of delivery
1 trainer
1 set of instructional material
