Visualisation using electrolytically generated hydrogen bubbles

Learning objectives/experiments

• visualisation of two-dimensional flows
• streamline course in flow around and through models
• flow separation
• vortex formation, demonstration of Karman vortices
• qualitative observation of the velocity distribution in laminar flow
  ….

Visualisation of laminar and turbulent flow processes in a water channel using electrolytically generated hydrogen bubbles

Learning objectives/experiments

• visualisation of two-dimensional flows
• streamline course in flow around and through models
• flow separation
• vortex formation, demonstration of Karman vortices
• qualitative observation of the velocity distribution in laminar and turbulent flow
  ….

Investigation of cross-sectional changes in laminar, two-dimensional flow; visualisation using electrolytically generated hydrogen bubbles

Learning objectives/experiments

• visualisation of two-dimensional flows
• learning the concept of streamlines, flow lines and strike lines
• streamline course through an experimental section with changes in cross-section
• limits of potential flow
  • friction
    ….

Visualisation of streamlines in a Hele-Shaw cell, ink as contrast medium

Learning objectives/experiments

• visualisation of streamlines in
  • flow around drag bodies: cylinder, guide vane profile, square, rectangle
  • flow through models: nozzle contour, sudden contraction or enlargement
  • flow separation, flow with 90° deflection
• modelling the flow around bodies by overlaying parallel flow and sources and/or sinks
  ….

Visualisation of flow around bodies and flow phenomena in open channels and pipes

Learning objectives/experiments

• streamlines when flowing around different solid drag bodies
• streamlines when flowing through different shaped models
• flow over different weirs

Investigation of flow around models in laminar, two-dimensional flow using ink as contrast medium

Learning objectives/experiments

• visualisation of streamlines in
  • flow around drag bodies
  • flow through changes in cross-section
• influence of sources and sinks

….

Illuminated test section, various models, fog generator included

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

Flow patterns in real fluids at different models; visualisation using fog

Learning objectives/experiments

• illustrative demonstration without detection or analysis of measured values
• flow patterns in real fluids when flowing around and through models
  • aerofoil with adjustable angle of attack
  • cylinder
  • orifice plate for change in cross-section
    ….

Measurement of laminar and turbulent flow

Learning objectives/experiments

• representation of the flow profile
• determination of local and averaged flow velocity
• effect of the Reynolds number on the flow profile
• recognise differences between laminar and turbulent flow formation
• pipe friction / shear stress
  ….

Experiments from the field of aerodynamics and fluid mechanics with an "Eiffel" type wind tunnel

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
    ….

Determining drag forces on models immersed in a flow

Learning objectives/experiments

• measure drag forces on models immersed in a flow
• determining drag coefficients
• application of the pulse rate
• record pressure distribution on the cylinder immersed in a flow
• measure the wake depression behind the cylinder immersed in a flow

Investigation of wall-guided airflow and familiarisation with the principle of pneumatic logic elements

Learning objectives/experiments

• investigation of wall-guided air flow (Coanda effect)
• familiarisation with the principle of pneumatic logic elements
• study amplification effect in pneumatic elements

Experiments on bodies immersed in a flow

Learning objectives/experiments

• experiments on bodies immersed in a flow
• determination of the drag coefficient (c_d factor)
• determination of the lift coefficient
• together with the force sensor HM 170.40
  • determination of the moment coefficient

Self-starting oscillations

Learning objectives/experiments

• examination of fluttering vibrations on aerofoils
• the use of a stroboscope permits the observation of the natural forms of the vibrating aerofoil.

Aerofoil model for investigating aerodynamic lift aids

Learning objectives/experiments

• experiments on bodies immersed in a flow
• influence of a slat
• Influence of a slot flap
• determination of the drag coefficient (c_d factor)
• determination of the lift coefficient
  ….

Experiments with different aerofoil angles of attack

Learning objectives/experiments

• record pressure distribution on an aerofoil immersed in a flow
  • as a function of the angle of attack

Investigation of the boundary layer on a flat plate with flow along the plate; two different surfaces

Learning objectives/experiments

• measure total pressure with Pitot tube
• measure static pressure, in the measuring section of HM 170
• determine velocity via dynamic pressure
• study the vertical velocity profile at the measuring point
• study the boundary layer thickness
  ….

Velocity distribution and boundary layer thickness within the boundary layer of a flat plate in longitudinal flow; vertically sliding Pitot tube

Learning objectives/experiments

• investigation of the boundary layer on a flat plate
• representation of velocity profiles

Investigation of boundary layers on a flat plate with flow along the plate

Learning objectives/experiments

• internal friction of gases
• investigation of the boundary layer on the flat plate
• influence of surface roughness on the formation of a boundary layer
• boundary layer interference with degressive/progressive pressure curve

Investigation of fluidised bed formation of solids in air and water

Learning objectives/experiments

• fundamentals of the fluidisation of bulk layers
• observation and comparison of the fluidisation process in water and air
• pressure loss dependent on
  • flow velocity
  • type and particle size of the bulk solid
    ….

Comparison of different modes of operation; water and/or air, parallel flow or counterflow mode

Learning objectives/experiments

• function of a packed column
• compare operating modes
  • with water
  • water-air operation in parallel flow
  • water-air operation in counterflow
    ….