Computational Fluid Dynamics and Wind Tunnel Determination of the Aerodynamic Characteristics of an Axi-Symmetric projectile
with a Conical Tail Flare

 

Dijana Damljanović

Slobodan Mandić

Đorđe Vuković

 

The evaluation of axial force was the main request during the design process of a training sub-caliber artillery projectile with a conical tail flare. To this end, a model of the projectile was tested in the T-38 trisonic blowdown wind tunnel of the Military Technical Institute (Vojnotehnički institut-VTI) at airspeeds up to Mach 4. The required test conditions and an unusual form of the model indicated the need to use the prototype of a new, very stiff wind tunnel balance with semiconductor strain gauges and also required a prediction of aerodynamic characteristics using FLUENT CFD software. The experimental and CFD results were compared after the tests, and a good agreement was found. Te flow field around the model was visualized during the tests using Schlieren method and corresponding numerical flow visualization images were also obtained by FLUENT

 

Key words: projectile aerodynamics, artillery projectile, sub-caliber projectile, aerodynamic testing, aerodynamic load, axial force, fluid dynamics, wind tunnel.