Home           Products           Company           Contact us     
> Fundamentals of Fluid Mechanics
> Steady Incompressible Flow
> Flow around Bodies
> Steady Flow of Compressible Fluids
> Examples of Transient Flow
> Hydraulic Fluid Energy Machines
> Components in Piping Systems and Plant Design
> Fluidic Experimental Plants
> Hydraulics for Civil Engineering
Products  |  Fluid Mechanics  |  Flow around Bodies  |  HM 226
HM 226 Wind Tunnel for Visualisation of Streamlines Show data sheet (pdf file) Print page
Technical Description

  Streamlines can be visualised in steady flow in the wind tunnel by using fog, smoke or tufts. In this way, a clear impression of an instantaneous flow field can be taught and problematic flow areas, such as stall, can be shown.  
  The experimental unit HM 226 is an open wind tunnel, in which streamlines, flow separation and turbulence can be made visible by using fog. The fog fluid is non-toxic, water soluble and the precipitate does not affect common materials. Precipitates can be easily wiped off with a cloth.
  The air flow is generated by a fan. To achieve a low-turbulence flow, the air flows through a stabilisation chamber with a flow straightener. Fog is added to the flowing air through several nozzles. Then the air flows around or through a model in a experimental section and the flow field becomes visible. The experimental section has a black background and a sight window; additional lighting makes the streamlines clearly visible.
  Four interchangeable models (cylinder, orifice plate, aerofoil and guide vane) are included. The aerofoil's angle of attack is adjustable. The fog is generated by evaporating a glycol mixture in the fog generator.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments
- visualisation of streamlines
- flow around or through differently shaped models
- flow separation and turbulence
- stall as a function of the angle of attack
* Wind tunnel with fog generator1
* Various models included1
* Illuminated experimental section with sight window1
* Low-turbulence flow
Alternative products
HM 170 -- Open Wind Tunnel
HM 225 -- Aerodynamics Trainer

[1] visualisation of streamlines flowing around and through different models
[2] open wind tunnel with radial fan and a fog generator
[3] operation with non-toxic and water-soluble fog fluid
[4] illuminated experimental section with sight window and black background
[5] low-turbulence flow through stabilisation chamber with flow straightener
[6] distributor with nozzles for injecting the fog
[7] four different models, angle of attack at aerofoil and guide vane adjustable
[8] scale for displaying the angle of attack


Technical Data

Experimental section

- transparent area: 252x252mm
- cross section: 252x42mm
- aerofoil pivotable by 360
- cylinder: 60x24,5mm
- aerofoil: 15X24,5x100mm
- guide vane: 20x24,5x100mm
- orifice plate: 2x 25x24,5x10mm
Radial fan
- max. air flow: 480m/h
- max. pressure level: 300Pa
Fog generator
- power consumption: 700W


Dimensions and Weight
LxWxH: 1.400x500x490mm
Weight: approx. 50kg
Required for Operation
230V, 50/60Hz, 1 phase
Scope of Delivery
1 experimental unit
1 fog generator
1 exhaust air hose
5L fog fluid
4 models
1 set of tools
1 set of instructional material
Order Details

070.22600  HM 226  Wind Tunnel for Visualisation

                                  of Streamlines

© 2005 G.U.N.T. Gerätebau GmbH