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<< Departments, laboratories, task groups | Aerodynamic Department | Trisonic Wind Tunnel N-3
  AERODYNAMIC DEPARTMENT

TRISONIC WIND TUNNEL N-3

The trisonic wind tunnel N-3 has been in operation since 1965. The tunnel is a blow-down type with partial recirculation of the flow and can be operated in all three regimes, viz. subsonic, transonic and supersonic. Over 15.000 runs have been performed in this tunnel so far.

Unsteady Pressure Measurements

Mounted airfoils and flaps can be excited to independent motion using the installed system:

  • oscillation frequency of the airfoil f = 0 ÷ 10 Hz (accuracy ≈ 0.1 Hz),
  • oscillation frequency of the flap f = 0 ÷ 12 Hz (accuracy ≈ 0.1 Hz),
  • oscillation range of the airfoil angle of attack, up to Δα = ±10o,
  • oscillation range of the flap angle of deflection, up to Δσ = ±15o,
  • during the run, the range of the reference angle of attack 20o.
  
TRISONIC WIND TUNNEL N-3 CHARACTERISTICS
Operation intermittent blow-down with partial re-circulation of the flow
Mach number M = 0.2 ÷ 1.15, 1.5, 2.3 with possible extension up to M = 3.5
Test section 0.6 m × 0.6 m square, for subsonic and transonic speed the top and bottom walls are perforated - the test section is connected with plenum chamber; for M = 0.2 ÷ 0.5 and supersonic speed all walls are closed
Run time
subsonic speed up to 10 minutes
transonic speed up to 5 minutes
supersonic speed up to 3 minutes
Stagnation pressure 1 ÷ 3 bars
Model incidence ±45o (during a run is possibility to change of 20o only)
Model roll angle 0o to 360o with 1 degree step
Aerodynamic Department | Avionics and System Integration Department | Propulsion Department | Landing Gear Department | Prototype Workshops | Strength and Dynamics Department | Aircraft Design Team | Materials & Structures Research Center | EDC

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