Cryogenic Wind Tunnel / Quiet Nozzle

About Cryogenic Wind Tunnel / Quiet Nozzle

Overview

The Cryogenic Wind Tunnel with Quiet Nozzle (CWT-QN) is an advanced aerodynamic testing system designed to accurately replicate real-flight Reynolds numbers and ultra-low turbulence conditions. By operating at cryogenic temperatures, the system increases air density to achieve full-scale Reynolds number simulation, while the precision-engineered quiet nozzle minimizes free-stream disturbances.

This enables highly reliable prediction of boundary layer transition, flow separation, and aerodynamic performancecritical for next-generation aerospace design and validation.

Technical Datasheet (Generalized Specifications)

Flow Regime

• Mach Number Range: 0.2 1.5 (Transonic) / up to 4.0 (Supersonic variants)
• Reynolds Number Range: 10 10 per meter
• Flow Velocity: 70 1,200 m/s

Cryogenic Operation

• Operating Temperature: 80 150 K
• Cooling Medium: Liquid Nitrogen (LN)
• Temperature Stability: 1 2 K

Quiet Nozzle Performance

• Turbulence Intensity: < 0.05% (ultra-low disturbance flow)
• Acoustic Disturbance Level: Significantly reduced vs conventional nozzles
• Boundary Layer Noise Control: Optimized contour and surface finish

Test Section

• Test Section Size: 0.2 1.5 m (typical cross-section)
• Test Pressure: 0.5 5 bar (adjustable)
• Optical Access: Large viewing windows (optional)

Flow Quality

• Total Pressure Stability: 0.5%
• Flow Uniformity: 0.20.5% across test section

Instrumentation & Measurement

• Force Measurement: High-precision balance systems
• Temperature Sensors: Cryogenic-rated thermocouples
• Pressure Measurement: High-resolution transducers
• Flow Diagnostics: PIV, Schlieren, LDA (optional)

 Cooling & Thermal Systems

• LN Consumption: 50 500 L/hr (depending on operation)
• Insulation: Vacuum-insulated test section
• Heat Exchanger: High-efficiency cryogenic heat exchangers

Control & Automation

• Control System: PLC/SCADA-based integrated control
• Real-time Monitoring: Temperature, pressure, flow, turbulence
• Data Acquisition: High-speed synchronized DAQ

Safety Systems

• Cryogenic Safety: Pressure relief, oxygen deficiency monitoring
• Emergency Shutdown: Automated system protection
• Structural Integrity: Low-temperature compatible materials

Key Advantages

• True Reynolds Number Simulation for real-flight accuracy
• Ultra-Low Turbulence Flow for precise transition studies
• Improved Prediction of Separation & Drag
• Reduced Scale Effects in Testing

Applications

• Aircraft wing and airfoil testing
• Boundary layer transition studies
• High-lift and drag reduction research
• Supersonic inlet and nozzle development
• Aerospace R&D and certification testing