Low-Speed Low-Turbulence Wind Tunnel
For measurement of the two-dimensional aerodynamic characteristics of wind turbine dedicated airfoils the Institute for Wind Energy uses the Delft University Low-Speed Wind Tunnel. The Low-Speed Low-Turbulence Wind Tunnel is owned by the Faculty of Aerospace Engineering of Delft University. It is an atmospheric tunnel of the closed-throat single-return type, with a contraction ratio of 17.8.
The six-bladed fan is driven by a 525 kW DC motor, giving a maximum test section velocity of about 120 m/s. The maximum Reynoldsnumber for two-dimensional testing is about 3,5 million.
The free-stream turbulence level in the test section varies from 0.015% at 20 m/s to 0.07% at 75 m/s. The 10 interchangeable octagonal test sections are 1.80 m wide, 1.25 m high and 2.60 meters long.
Mechanically actuated turntables flush with the test-section top and bottom wall provide positioning and attachment for a two-dimensional model.
The standard wind tunnel testing equipment consists of an electronically read 200 tubes multimanometer with fiber optic cells, a 6-component balance, a 192 ports electronic pressure scanner system and hot wire anemometry and PIV systems. For flow visualization purposes an infra-red camera system is available.
Data are recorded using an electronic data acquisition system and are on line reduced using the HP 9000-712 laboratory computer.
Contact Information:
Nando Timmer
tel: +31 (15) 27 88279,
E-mail: W.A.Timmer (add @tudelft.nl manually)
