DNW-LLF: Large Low speed Facility

Infrastructure
Description

Closed circuit, atmospheric, continuous low-speed wind tunnel with one closed wall and one configurable (slotted) wall test section and an open jet. Closed wall test sections: 9.5 m x 9.5 m: 0 < V < 62 m/s, 8 m x 6 m: 0 < V < 116 m/s, 6 m x 6 m: 0 < V < 152 m/s; Open jet: 8 m x 6 m: 0 < V < 80 m/s

Main technical characteristics

• Reynolds no. maximum in [10^6 m/m]: 6
• Configuration studies, database creation (civil and military transport aircraft, fighters, helicopters, spacecraft, cars and trucks)
• Engine integration studies (turbofan/turboprop) with air-powered simulators
• Air exhaust simulation with compressed air
• Air intake surveys for fighters and helicopters
• Aeroacoustic testing on full-scale aircraft components (landing gears, wings)
• Full-scale cars and trucks (drag and aeroacoustics)
• Low noise facility. Compressed air supply with a capacity of 5 kg/s continuously at 80 bar
• Remotely controlled y-z traversing system• Turbulence level: 0.02 – 0.04%
• Flow angularity < 0.1 degree
• Vacuum system
• Moving belt ground plane for ground simulation (upto 80 m/sec)
Background noise level < 65dB EPNL (mid frequency range).

Contact Information
Noordoostpolder (Netherlands)
EREA