The vertical low turbulence wind tunnel is a tunnel with an open test section and a vertical inflow from below. The inflow is through a circular exit with a diameter of 0.6m. Due to the high contraction ratio of the settling
chamber the quality of the airflow is very high in terms of the turbulence level, which is smaller than 0.1%. Next to this, the tunnel is relatively silent, which enables performing aeroacoustic experiments. The maximum achievable velocity is 45m/s.

Typical research topics

  • Aero-acoustic research on flow over cavities and Helmholtz resonators
  • Flow control of separation on flap-type models
  • Boundary layer research on transition
  • Education: Measurements of lift and flow phenomena of quasi-2D wing models

Overview of vertical low turbulence tunnel


Low Speed Laboratory (LSL)