The Trisonic Windtunnel Munich (TWM) is a blow-down wind tunnel for sub-, trans- and supersonic flows.  It covers the Mach number range from Ma = 0.3 to 3.0 and total pressure range from 1.2 to 5.0 bar. For the Mach number control in subsonic operation, an adjustable diffuser located downstream of the measurement section is used. In supersonic operation, the Mach number is controlled by an adjustable Laval nozzle in front of the measuring section. To reduce the blockage effect in the transonic regime, the measurement section walls are equipped with suction systems.

The test section offers a wide range of model mounting options and good optical accessibility. Due to technical details such as the plenum chamber, the adjustable divergence of floor and ceiling as well as the adaptable suction of the wall boundary layers, the facility is of great interest for both basic research and industrial developments. The following list shows the most important operating parameters.


Basic data

Mach number: 0,3 ... 3,0
Accuracy better 0,005
Dynamic pressure: 1,2 bar ... 5,0 bar
Accuracy better 5 mbar
Measurement section:  Length: 1700 mm, Width: 300 mm, Height: 675 mm
Model mounting: rear handle mount, side window, bottom
Angle of attack range: 40° (e.g. -5° ... +35°)
Wall boundary layer suction capability
Pressure reservoir: Volume: 2 x 190 m³
Pressure: 20 bar
Fill Time: 105 min (from 1 bar to 20 bar)
Nozzle contraction: 8,7
Measurement techniques: Particle Image Velocimetry (PIV)
Pressure Sensitive Paint (PSP)
Deformation measurement technique
96 static pressure sensors (10 Hz)
40 dynamic pressure sensors (100 kHz)
4-color Schlieren-system





Reynolds number as a function of Mach-number



Testing time as a function of Mach-number