Description
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: | Total Volume: 360 m³ |
| Pressure: max. 20 bar | |
| Fill Time: ca. 90 min (from 1 bar to 20 bar) | |
| Nozzle contraction: | 8,7 |
| Measurement techniques: | Particle Image Velocimetry (PIV) |
| Pressure Sensitive Paint (PSP) | |
| Infrared-Thermography | |
| Deformation measurement technique | |
| 96 static pressure sensors (10 Hz) | |
| 40 dynamic pressure sensors (100 kHz) | |
| 4-color Schlieren-system |
Sketch
Reynolds number as a function of Mach-number
Testing time as a function of Mach-number
