hm 170 open wind tunnel - gunt.de around bodies 199 hm 170 open wind tunnel training at the hm 170...
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FLOW AROUND BODIES
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HM 170 OPEN WIND TUNNEL
Training at the HM 170 Open Wind Tunnel at the Technical College for Aeronautical Engineering in Hamburg (Germany)
Measuring lift and drag forces as a function of the angle of attack of an aerofoil with flap and slot
HM 170 Open WindTunnel at the Technical University of Wildau (Germany), Laboratory for Aeronautical Engineering
Measuring lift and drag forces and moment on the aerofoil drag body with the three-component force sensor
Measuring lift and drag forces on the streamlined body with the two-component force sensor
The NEW design of the open wind tunnel HM 170
Pressure distribution on an aerofoil under surrounding flow
GUNT offers an “Eiffel” type open wind tunnel as a classic experiment system in the field of flow around bodies.
The flow medium of air is brought up to the desired velocity by a fan and flows around the model being studied in a measuring section. Additional
experiments, such as investigation of the boundary layer or pressure distri-bution of drag bodies immersed in a flow are available as options.
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HM 170 SELECTED EXPERIMENTS
PRESSURE DISTRIBUTION AT THE PERIMETER OF A CYLINDER UNDER SURROUNDING FLOW
FLOW AROUND VARIOUS DRAG BODIES HM 170.01 – HM 170.11
DEMONSTRATION OF FLUTTER
Air flows along an elastic system which can be moved by motion-controlled flow forces in vibrations with significant amplitudes. This instability phenomenon is called flutter. Flutter is crucial in the design of aircraft, bridges, chimneys and high-voltage power lines. This model can be used to demonstrate the aerodynamic excitation of vibrations and instability. By using a stroboscope it is possible to observe the natural oscil-lation of the wing.
HM 170.23 Pressure Distribution on a Cylinder
record pressure distribution on the perimeter of the cylinder
measuring the static pressure
each pressure measurement point is equipped with a hose connection
1 measuring point, 2 flow separation, 3 turbulence Comparison between measured and theoretical pressure distribution whenflowing around a cylinderred theoretical pressure distribution, green measured pressure distribution
Force measure-ment on the drag body
FA lift force, FW drag
Flutter shown over time
In conjunction with the inclined tube manometer: Recording the pressure distribution by individual measurement at the pressure measurement points on the cylinder
In conjunction with the HM 170.50 16-Tube Manometers: Recording the pressure distribution
Particularly clear illustration of the pressure distribution by the simultaneous measurement of all pressure measuring points with the HM 170.50 16-Tube Manometers
determining drag and lift coefficients
two-component force sensor for measuring drag and lift forces included in HM 170
visualisation of streamlines by using fog
HM 170.20 Airfoil, Spring-Mounted
demonstrate flutter (self-excited vibrations)
natural oscillation behaviour can be influenced by different spring settings
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HM 170.22 Pressure Distribution on an AerofoilAerofoil profile NACA 0015length x width x height: 100x60x15mmItem No. 070.17022 recording the pressure curve measuring the lift force
additional aerofoil profiles available:HM 170.26 NACA 54118, LxWxH: 100x60x19,65mm, Item No. 070.17026HM 170.27 NACA 4415, LxWxH: 100x60x15,5mm, Item No. 070.17027
HM 170 ACCESSORIES FOR THE WIND TUNNEL
HM 170.01 Drag Body Spherediameter: 80mmItem No. 070.17001
HM 170.02Drag Body Hemispherediameter: 80mmItem No. 070.17002
HM 170.03Drag Body Circular Discdiameter: 80mmItem No. 070.17003
HM 170.04 Drag Body Circular Ringouter diameter: 113mminner diameter: 56,5mmItem No. 070.17004
HM 170.05Drag Body Square Platelength x width: 71x71mmItem No. 070.17005
HM 170.08Drag Body Streamlined Shapelength: 240mmdiameter: 50mmItem No. 070.17008
HM 170.09 Drag Body AerofoilAerofoil profile NACA 0015length x width x height: 100x100x15mm Item No. 070.17009
HM 170.10 Drag Body Paraboloidlength: 90mmdiameter: 80mmItem No. 070.17010
HM 170.11 Drag Body Concave Shapediameter x length 80x68,65mmItem No. 070.17011
HM 170.21 Aerofoil with Slat and Slot Flap Aerofoil profile NACA 0015 length x width x height: 100x100x15mmItem No. 070.17021
HM 170.23 Pressure Distribution on a Cylinderdiameter x height: 50x75,5mmItem No. 070.17023
HM 170.06Drag Body Flaglength x width: 100x50mmItem No. 070.17006
HM 170.07Drag Body Cylinderdiameter x height: 50x100mmItem No. 070.17007
HM 170.34 Tube for Static Pressurediameter x length: 4x360mm, 2 holes with inner diameter: 0,8mm, Item No. 070.17034
Measuring static pressure: 1 measuring point for static pressure
HM 170.25 Model “Bernoulli”Air inlet: 292mm, air outlet: 146mm, opening angle 52°, Pitotstatic tube: outer diameter: 4mm Item No. 070.17025
horizontally movable Pitotstatic tube wedge-shaped inserts forming a measuring section
whose cross-section steadily narrows
Measuring pressures:1 stagnation point at the Pitotstatic tube (total pressure), 2 measuring point for static pressure, 3 inclined tube manometer from HM 170 displays the dynamic pressure
HM 170.28 Wake MeasurementCylinder: diameter x height: 20x100mmWake rake consists of 15 Pitot tubes, outer diameter: 2mm, distance between the Pitot tubes: 3mmItem No. 070.17028
it is possible to display the measured values on the PC using HM 170.55 Electronic Pressure Measurement
Measuring pressures: 1 stagnation point at the Pitot tube (total pressure), 2 cylinder, 3 measuring point for static pressure, 4 HM 170.50 16-Tube Manometers displays the dynamic pressure
HM 170.31 Pitot Tubeouter diameter: 4mmItem No. 070.17031
HM 170.32 Pitot Tube, Smallouter diameter: 2mmItem No. 070.17032
Determining the total pressure 1 stagnation pointThe pressure in the stagnation point is equal to the total pressure
HM 170.33 Pitotstatic Tube outer diameter: 3mmItem No. 070.17033
Measuring the dynamic pressure: 1 stagnation point, 2 measuring point for static pressureThe difference between total and static pressure gives the dynamic pressure
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HM 170 ACCESSORIES FOR THE WIND TUNNEL
HM 170.24 Boundary Layer Analysis with Pitot Tube2 plates, rough and smooth, LxWxH=279x250x3mmItem No. 070.17024
vertically movable Pitot tube measures the pressures at various distances from the plate surface horizontally movable plate for recording pressures
along the flow displaying measured values on the PC using
HM 170.60 System for Data Acquisition and HM 170.61 Electronic Displacement Measurement
Measuring pressures:1 stagnation point at the Pitot tube (total pressure), 2 flat plate, 3 boundary layer, 4 measuring point for static pressure, 5 16-tube manometers from HM 170 displays the dynamic pressure
HM 170.40 Three-Component Force SensorLxWxH: 370x315x160mm (measuring amplifier)diameter x height: 115x150mm (force sensor)Item No. 070.17040
measuring amplifier with connections for forces and moment connection to HM 170.60 possible display of drag, lift and moment
Measuring ranges drag: -4...+4N lift: -4...+4N torque: -0,5...+0,5Nm
1 force sensor, 2 measuring amplifier
HM 170.61 Electronic Displacement MeasurementItem No. 070.17061
optional accessories for HM 170.24 Boundary Layer Analysis with Pitot Tube displaying measured values on the PC using the
HM 170.60 System for Data Acquisition
Measuring rangeDisplacement: 0…10mm
HM 170.20 Airfoil, Spring-MountedAerofoil profile NACA 0015LxWxH: 200x100x15mmItem No. 070.17020
transverse rigidity: 216N/m torsion rigidity: 0,07..0,28Nm/rad
HM 170.55 Electronic Pressure Measurement 0...500PaLxWxH: 370x315x160mmItem No. 070.17055
18 inputs, 0...500Pa CD with GUNT software included data acquisition via USB under Windows Vista
or Windows 7
HM 170.60 System for Data AcquisitionLxWxH: 370x315x160mm (interface module)Item No. 070.17060
CD with GUNT software included data acquisition via USB under Windows Vista
or Windows 7 angle sensor
Measuring ranges displacement: 0…10mm angle: 0…360° pressure: 0…10mbar velocity: 0…48m/s force
drag: -5...+5Nlift: -5...+5Nmoment: -0,5...+0,5Nm (for HM 170.40 Three-Component Force Sensor)
HM 170.52 Fog GeneratorLxWxH: 370x315x160mm (supply unit)Power consumption: 500WItem No. 070.17052
HM 170.50 16-Tube ManometersLxWxH: 670x215x745mmItem No. 070.17050
pivoted, inclination stages: 1:1, 2:1, 5:1, 10:1 max. 600mmWC height-adjustable manometer individual zero points can be set
The tube manometer operates on the principle ofcommunicating tubes
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pressure drag, lift force,
moment (only with HM 170.40)
displacement/ angle
velocity
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