MP 330D SUBSONIC WIND TUNNEL, Downstream Fan
GENERAL DESCRIPTION

    The wind tunnel is an open circuit down stream fan type designed for studying the subsonic aerodynamics. It is to be used with optional accessories and models below.

    The air enters the tunnel via an entrance flare. A flow straightener, three wire mesh screens, and a high contraction ratio section ensure uniform velocity across the transparent test section. Downstream of the working section is a low angle diffuser which terminates at the tunnel fan. The diffuser and contraction sections have a high quality internal finish to minimize the boundary layer effects. The fan impeller blades are of an aerofoil design cast aluminum to ensure maximum aerodynamic efficiency and minimum turbulence. Fan speed is adjustable by an inverter. 

    Four equally spaced static pressure taps are connected to a manifold to minimize effects from a model. Air speed is indicated by an inclined manometer and a calibration graph. Models are mounted on two components balance support with digital display for measurement of drag and lift. Model holder can be rotated to allow quick change on the angle of incidence.  This angle is indicated on an angular scale.

    The tunnel is mounted on a steel table on wheels.

TYPICAL EXPERIMENTS
  • Pressure and velocity measurement.
  • Estimation of drag coefficients of various bodies, eg. sphere, hemisphere, disc, streamlined shape etc.
  • Estimation of drag and lift coefficients of an aerofoil.
  • Pressure distribution around an aerofoil or a cylinder.
  • Effects of instability of a “flutter Wing”.
  • Investigation of boundary layer at a flat plate by measuring total head distribution.
  • Stream lines visualization using a smoke generator.
  • Wakes behind models.
TECHNICAL DATA
Fan  :        
 - Diameter : 500 mm.    
 - Impeller : Single stage, aerofoil aluminum blade.    
Contraction area ratio : 7:1.    
Air velocity control : Inverter.    
Test Section : 300 mm x 300 mm x 600 mm long, transparent on three sides.
Maximum air velocity : Over 30 m/s.    
Measuring instruments        
 - Water manometer : Twin type.    
 - Wind velocity : Multiple taps contraction section differential pressure with velocity calibration graph (to be used with inclined water manometer above).
 - Lift and drag : Two component balance for measurement of lift and drag.  
Power supply : 380 V 3 Ph 50 Hz. Other power supply is available on request.
OPTIONAL EQUIPMENT

OPTIONAL ACCESSORIES

MP 330-003   Three component balance for measurement of lift drag and pitching  instead of two component balance.
MP 330-005   Velocity (differential pressure) digital display.      
MP 330-110   Anemometer for velocity measurement.      
MP 330-111   Angle digital display for model angular position.      
MP 330-114   Multitube inclined water manometer.      
MP 330-114D   16 point differential pressure sensor with sequential readings instead of multitube inclined water manometer.
MP 330-121   Pitot-static probe stainless steel.      
MP 330-122   Yaw probe three tube type with clamp.      
MP 330-125   Wake survey rake.      
MP 330-130   Smoke generator set.      

 

OPTIONAL MODELS

Models for a study of lift drag and pitching include :

MP 330-011   Sphere
MP 330-012   Hemisphere      
MP 330-013   Circular disc      
MP 330-014   Circular ring      
MP 330-015   Square plate      
MP 330-016   Vane      
MP 330-017   Cylinder      
MP 330-018   Streamlined shape      
MP 330-019   Aerofoil      
MP 330-025   Model air plane      
MP 330-026   Model automobile      
MP 330-030   Aerofoil with slot and flap      

 

OPTIONAL MODELS AND ACCESSORIES FOR INDIVIDUAL STUDY

MP 330-050   Flutter wing
MP 330-053   Pressure wing      
MP 330-055   Pressure cylinder      
MP 330-057   Boundary layer plate with probe.      
MP 330-150   Computer Interface      
    This package consists of computer interface unit software and required accessories for:      
    • Control of wind velocity.      
    • Display of:      
      -  Wind velocity lift drag pitching moment and angle of attack.      
      -  Coefficient of lift drag and pitching moment.      
      -  Pressure distribution.      

 

Net (unpacked) shipping dimensions WxLxH     : 140 x 440 x 155 cm    
Net weight : Approx. 560 kg