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Experimental aerodynamics laboratory

The Experimental Aerodynamics Laboratory was established in 1952. Its basic activities are model design and fabrication, wind tunnel testing, and design and production of wind tunnel equipment and instrumentation.

Main task of the Experimental Aerodynamics Laboratory is experimental support of research and development during the design phase of aircraft and missile projects. It consists of five wind tunnels and a high precision model workshop.

The wind tunnels are equipped with modern instrumentation, enabling various tests and measurements of static and dynamic model characteristics.

Workshop facilities are equipped with CAD/CAM systems and CNC lathe and milling machines.

 Wind Tunnels

 Wind tunnels are used for testing models of aeronautical and non-aeronautical objects. Typical tests are:

 

• Forces and moments measurements

• Pressure distribution measurements

• Dynamic stability derivatives measurements

• Flow field testing

• Flow visualization

• Minimum drag measurements

• High angle of attack measurements

• Store loads measurements

• Ground effect testing.

 

The most important wind tunnels are:

 

• The T-35 large subsonic wind tunnel

The T-35 is a continuous, closed circuit type wind tunnel with 4.4 m × 3.2 m test sections, Mach number range of 0.1 to 0.5, and Reynolds number range of up to 12 millions/m. It is driven by a variable pitch fan, powered by four AC motors with a maximum power of 7.2 MW.

• The Т-38 trisonic wind tunnel

The T-38 is a blowdown, intermittent type wind tunnel with 1.5 m × 1.5 m rectangular test sections. It is driven by air stored in high-pressure tanks by a five-stage 4 MW compressor. The T-38 wind tunnel enables testing in three speed ranges – subsonic, transonic and supersonic. It has Mach number range of 0.2 to 4.0 and high Reynolds number range of up to 140 millions/m.

 

Remaining wind tunnel facilities within the Experimental Aerodynamics Laboratory are:

 

• The Т-32 small subsonic wind tunnel 1.2 × 1.8 m

• The Т-33 water cavitation tunnel 0.5 × 0.35 m

• The Т-36 small trisonic wind tunnel 0.25 × 0.25 m.

The model workshop

The CAD/CAM Siemens NX application is used for design and production of wind tunnel models, measuring equipment and instrumentation. The model workshop applies a broad spectrum of conventional and non-conventional technologies in model production, including advanced CNC machine treatment and inspection using the 3D measuring machine.

References

The Experimental Aerodynamics Laboratory produced and tested models of domestic aircraft, such as: G-2 (Galeb), J-21 (Jastreb), J-22 (Orao), G-4 (Super Galeb), L-95 (Lasta), domestic missile models such as ATM Osa, ATM Zolja, ATM Bumbar, SSM Oganj, SSM Orkan, ASM Grom, and a number of models for foreign customers.