For the experimental investigation of subsonic and transonic flows in turbomachinery as well as for vibration analysis different optical methods had been established at the Institute for Thermal Turbomachinery and Machine Dynamics to support experimental data acquisition using non-intrusive methods.

For flow visualisation these are:

• Laser Light Sheet Visualisation
• Colour Schlieren Visualisation

For quantitative flow analysis using tracer particles:

• Laser Doppler Velocimetry
• Phase Doppler Anemometry
• Particle Image Velocimetry

For quantitative flow analysis using refractive index:

• Holographic Interferometry
• Differential Interferometry

For vibration analysis:

• Holographic Interferometry
• Laser Vibrometry

For thermal analysis:

• Infrared thermographic system
• Thermochromic liquid cristal

For flow analysis these are:

• Temperature Probes
• Pressure Probes
• Fast Response Pressure Probe
• Five Hole Probe