Numerical simulations in obtaining drag reduction for projectile with base bleed
An artillery projectile in flight produces a low pressure area immediately behind the projectile which creates a force called base drag which lessens the velocity of the projectile. It is known that theoretically this base resistance can be reduced or even eliminated by allowing a stream of hot gas...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Military Technical Institute, Belgrade
2016-01-01
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| Series: | Scientific Technical Review |
| Subjects: | |
| Online Access: | https://scindeks-clanci.ceon.rs/data/pdf/1820-0206/2016/1820-02061602036B.pdf |
| _version_ | 1818505714283315200 |
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| author | Belaidouni Habib Živković Saša Samardžić Marija |
| author_facet | Belaidouni Habib Živković Saša Samardžić Marija |
| author_sort | Belaidouni Habib |
| collection | DOAJ |
| description | An artillery projectile in flight produces a low pressure area immediately behind the projectile which creates a force called base drag which lessens the velocity of the projectile. It is known that theoretically this base resistance can be reduced or even eliminated by allowing a stream of hot gas to flow out of the base surface of the projectile in a suitable manner. The effect produced by this stream of hot gas is called base-bleed effect. The internal ballistic calculation of existing base bleed configuration is presented in the paper. A numerical simulation of axisymmetric body projectiles was obtained with the Reynolds Averaged Navier-Stokes (RANS) computational fluid dynamics software (CFD). Also, two turbulence models were tested and validated with the semi empirical prediction. The realizable k-ɛ turbulence model was chosen for calculation of aerodynamic drag of the projectile with and without base bleed effect. Computed result show a drag reduction with base bleed of about 12% in supersonic flow regime. |
| first_indexed | 2024-12-10T21:54:43Z |
| format | Article |
| id | doaj.art-6410a889b2124c518fe709b6dc0d90f1 |
| institution | Directory Open Access Journal |
| issn | 1820-0206 2683-5770 |
| language | English |
| last_indexed | 2024-12-10T21:54:43Z |
| publishDate | 2016-01-01 |
| publisher | Military Technical Institute, Belgrade |
| record_format | Article |
| series | Scientific Technical Review |
| spelling | doaj.art-6410a889b2124c518fe709b6dc0d90f12022-12-22T01:32:05ZengMilitary Technical Institute, BelgradeScientific Technical Review1820-02062683-57702016-01-0166236421820-02061602036BNumerical simulations in obtaining drag reduction for projectile with base bleedBelaidouni Habib0Živković Saša1Samardžić Marija2University of Defense, Military Academy, BelgradeMilitary Technical Institute (VTI), BelgradeMilitary Technical Institute (VTI), BelgradeAn artillery projectile in flight produces a low pressure area immediately behind the projectile which creates a force called base drag which lessens the velocity of the projectile. It is known that theoretically this base resistance can be reduced or even eliminated by allowing a stream of hot gas to flow out of the base surface of the projectile in a suitable manner. The effect produced by this stream of hot gas is called base-bleed effect. The internal ballistic calculation of existing base bleed configuration is presented in the paper. A numerical simulation of axisymmetric body projectiles was obtained with the Reynolds Averaged Navier-Stokes (RANS) computational fluid dynamics software (CFD). Also, two turbulence models were tested and validated with the semi empirical prediction. The realizable k-ɛ turbulence model was chosen for calculation of aerodynamic drag of the projectile with and without base bleed effect. Computed result show a drag reduction with base bleed of about 12% in supersonic flow regime.https://scindeks-clanci.ceon.rs/data/pdf/1820-0206/2016/1820-02061602036B.pdfartillery projectilebase bleed projectileprojectile aerodynamicsaerodynamic thrustnumerical simulationcomputational fluid dynamics |
| spellingShingle | Belaidouni Habib Živković Saša Samardžić Marija Numerical simulations in obtaining drag reduction for projectile with base bleed Scientific Technical Review artillery projectile base bleed projectile projectile aerodynamics aerodynamic thrust numerical simulation computational fluid dynamics |
| title | Numerical simulations in obtaining drag reduction for projectile with base bleed |
| title_full | Numerical simulations in obtaining drag reduction for projectile with base bleed |
| title_fullStr | Numerical simulations in obtaining drag reduction for projectile with base bleed |
| title_full_unstemmed | Numerical simulations in obtaining drag reduction for projectile with base bleed |
| title_short | Numerical simulations in obtaining drag reduction for projectile with base bleed |
| title_sort | numerical simulations in obtaining drag reduction for projectile with base bleed |
| topic | artillery projectile base bleed projectile projectile aerodynamics aerodynamic thrust numerical simulation computational fluid dynamics |
| url | https://scindeks-clanci.ceon.rs/data/pdf/1820-0206/2016/1820-02061602036B.pdf |
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