S2MA

Continuous-flow wind tunnel, Variable pressure, Mach 0.1 to Mach 3.0

S2 wind tunnel, general overview

 

Modane S2, Continuous-flow wind tunnel, Variable pressure,
Mach 0.1 to Mach 3.0
An S2MA experiment is capable of providing an initial data-base within a matter of 3 to 4 months
Global measurement approach using techniques such as 360° PSP and MDM
Simple models with very few pressure taps
Fast configuration changes
Wall corrections validated with the large S1MA tunnel
Extensively used by a number of worldwide customers

MEASUREMENTS

Test range diagram
  • Steady measurements = 154 analog channels, 16 bits A/D converter, digital lowpass filtering with a bandwidth from 0.01 to 10 Hz. Steady accuracy ±1 mV, resolution 0.3mV.
  • Unsteady measurements = 64 analog channels at 100 kHz per channel. 12 bits A/D converter, digital lowpass filtering with a bandwidth from 0 to 20 kHz (if necessary the number of channels can be increased).
  • Steady pressures = 992 channels (by DTC PSI®, system 8400) (On demand this number of pressure channels can be increased up to 1984).
  • Automatic quality checks of the pressure measurement units.
  • Real-time spectral analysis
  • Automatic quality checks of the voltage measurement units.
  • Real-time data processing.
  • Model supports and tunnel wall interferences corrections.
  • Measurement while one parameter is continuously varying.

INSTRUMENTATION AND MEASUREMENT METHODS

  • Internal balances: 80 balances available and new ones manufactured on request.
  • Wall-mounted balances with compressed air supply, for half-span models.
  • Jet engine simulation (air turbine).
  • Hot jet (pyrotechnic) or cold jet simulation (air pressure up to 150 bar and up to 15 kg/s air mass flow).
  • Devices for air inlet tests.
  • Airflow visualisations by shadowgraph, pigmented oils, acenaphtene sublimation, tufts, infrared thermography
  • PIV
  • PSP (Pressure Sensitive Paints).
  • MDM (Model deformation Measurement)

TYPICAL TESTS

Business jet test
  • Longitudinal and lateral force tests.
  • Air intakes (steady and unsteady measurement).
  • Store release (jettison test and captive trajectory system).
  • Dynamic stability tests.
  • Buffeting and flutter tests.
  • Nacelle/pylon/wing interference (blow/TPS nacelles).
  • Fuselage aft en test (geometry effects, sting and jet interference).
  • Transverse jet simulation on rolling models.
  • Parietal pressures.

ABSOLUTE CONFIDENTIALITY-GUARANTEE

Model preparation and tests in secure cells.
Numerous tests for foreign customers, all with confidentiality absolutely guaranteed.