Increasing the Range of Contemporary Artillery Projectiles
| Autor: | Danilo Djurdjevac, Slobodan Jaramaz, Damir Jerković, Mohammed Amin Dali |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
artillery projectiles
base bleed Base bleed 020209 energy Nuclear Theory CFD drag reduction hollow base range extension 6-DOF 02 engineering and technology 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics Range (aeronautics) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Aerospace engineering Nuclear Experiment business.industry Projectile General Engineering lcsh:TA1-2040 Artillery business lcsh:Engineering (General). Civil engineering (General) Geology |
| Zdroj: | Tehnički vjesnik Volume 26 Issue 4 Tehnički Vjesnik, Vol 26, Iss 4, Pp 960-969 (2019) |
| ISSN: | 1848-6339 1330-3651 |
| Popis: | The study of increasing range of standard 122 mm artillery projectile was done mainly by changing the base drag of standard projectile using hollow base shape and base bleed unit. The drag reduction in the case of the projectile with base bleed was up to 20% compared to the standard projectile, and in the case of the hollow base projectile, the drag reduction reaches 8%. Optimisation of base drag reduction was done by using the computational fluid dynamics software (CFD). CFD analyses enable complete calculation of fluid parameters behind the projectile base and determination of base bleed burning gases influence on flow field. In that way, we determine the pressure on the projectile base in the case of projectile with hollow base or with base bleed. CFD computations give us relation between base drag reduction and characteristics of base bleed grain. Using the CFD results in the modified 6-degree of freedom (6-DOF) projectile trajectory model, we calculate ranges of projectiles. The verification of estimated range increase by projectile modification was done by comparison with experimental results obtained on firing range. Comparison of measured range and results from 3-D radar show good compatibility with theoretical results from the modified 6-DOF. |
| Databáze: | OpenAIRE |
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