Fundamental and Experimental Aerodynamics

S3 Transonic Wind-Tunnel
with Return Circuit and Continuous Operation
Overview

Overall view of the S3 wind tunnel

Main characteristics

• Mach number envelope: 0.2 < M < 1.3

• Stagnation pressure: atmospheric pressure

• Stagnation temperature: 290 < Ti (K) < 330

• Average turbulence intensity: 0.15%

• Two-stage 3500 kVA fan unit with compression ratio of 1.25.

Guided test section with interchangeable walls

• Semi-square section: 0.763 x 0.804 m² , length: 2.2 m

• Top and bottom walls rigid solid or perforated, or deformable and adaptable

• Lateral walls equipped with windows for observation or optical measurements.

Equipment

• Compressed air distribution: Flow rate 2kg/s at 40 bars and 300 K

• Vacuum pump (0.1 kg/s) and flow extractor by induction Venturi (up to 4 kg/s)

• Data acquisition and processing system (48 measurement channels)

Types of setups

Lower wall

Upstream sting

Between walls

Straight wall     

Downstream sting

Last Update: 11 June 2007 - © ONERA 2009 - Terms of use