Airflow and air compression > Wind Tunnels

MP 315D SUBSONIC WIND TUNNEL, Downstream Fan

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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 a wire mesh screen and a flow straightener. A high contraction ratio section ensures 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 on a frame with adjustable footings for table top mounting.

Instruction manual is also included.

  • 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.
  • Investigation of boundary layer at a flat plate by measuring total head distribution.
  • Stream lines visualization using a smoke generator.
  • Wakes behind models.

     

     

     

     

  • Fan:
    
- Diameter: 300 mm   
- Impeller: Single stage, aerofoil blade   
  • Contraction area ratio
: 9:1   
  • Test section
: 150 mm x 150 mm x 450 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)   
- Sensors with digital display    
  • Lift and drag
: Two component balance with model holder for measurement of lift and drag   
  • Power supply
: 220 V, 1 Ph, 50 Hz. Other power supply is available on request.   
     
     
  • Net (unassembled) Shipping Dimensions WxLxH: 55 x 60 x 145 cm
  • Net Weight: 55 kg
  • MP315DS
Learning Software to support both online/offline training with data calculation and analysis by manual data entry from analog measuring instruments.
  • MP315-003A
Three component balance with digital display and model holder for measurement of lift, drag, and pitching instead of two component balance.
  • MP330-110
Anemometer for velocity measurement, telescopic handle
  • MA216-450
Multitube inclined water manometer
  • MA216-450D
16 points differential pressure sensor with sequential readings (To be used with computer)
  • MP315-121
Pitot-static probe, stainless steel
  • MP315-122
Yaw probe, three tube type with clamp
  • MP315-125
Wake survey rake
  • MP315-160
Computer Control (computer not included) This includes MP315DS and significant sensor(s) instead of analog measuring instrument(s),
data acquisition (capture, display, graph and/or data export), additional software function for real-time data logging and control
with computer interface unit and WiFi feature for data logging and real-time display remotely on smartphone (iOS and Android)
 
  • MP315DS
Learning Software to support both online/offline training with data calculation and analysis by manual data entry from analog measuring instruments.

MP315-160 Computer Control

OPTIONAL MODELS FOR LIFT AND DRAG

: Models for a study of lift, drag and pitching include:

MP315-011Sphere, plastics
MP315-012Hemisphere, plastics
MP315-013Circular disc
MP315-014Circular ring
MP315-015Square plate
MP315-016Vane
MP315-017Cylinder, plastics
MP315-018Streamlined shape, plastics
MP315-019Aerofoil, aluminium
MP315-019LAerofoil, long, aluminium
MP315-030Aerofoil with slot and flap, aluminium
MP315-030LAerofoil with slot and flap, long

OPTIONAL MODELS AND ACCESSROIES FOR INDIVIDUAL STUDY

MP315-053 Pressure wing, aluminium
MP315-055Pressure cylinder, plastics:
MP315-057Boundary layer plate with probe
MP330-130Smoke generator set
MP142-003Additional Smoke fluid
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