Small subsonic wind tunnel for turbulence and boundary layer research
This wind tunnel was designed and manufactured in the Institute of Thermomechanics CAS at the end of 1970. It has a contraction 28, and a closed test section 0.1 x 0.1 m2 x 2.2 m with controlled suction from three walls (side walls and bottom), and the polished upper wall has flush-mounted inserts for boundary layer and hot-wire probes.
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| The high-speed wind tunnel
for turbulence and boundary layer research |
A set of turbulence grid generators at the test section entrance makes it possible to reach the turbulence intensities up to 12% (homogeneous, close to isotropic, up to 100m/s), or 3% for M ~ 0,7 , with the structure close to that in turbomachines. With a slight modification of the sonic throat it is possible to generate periodic pulsations in the test section up to the frequency of 500 Hz.
This wind tunnel is designed for:
- development of the methodology of CTA measurements at changing flow temperatures, in close proximity of the walls, at high subsonic velocities (Ma >0.5), and at large temperature gradients. This methodology has already been used in experimental investigations of a fundamental character, in measurements on actual turbomachines (power plant steam turbines, industrial compressors), and in modelling the smoke trails, etc..
- fundamental research into processes and phenomena in shear flows (boundary layers, mixing layers, separated flows), and in investigations of the transition to turbulence in internal flows.
| content: | Martin Luxa |
| designer & administrator: | David Šimurda |
