Progress on Hypervelocity Railgun Research for Launch to Space

McNab, I.R.

doi:10.1109/elt.2008.65

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…O zamandan beri elektromanyetik fırlatıcılar birçok araştırmaya konu olmuştur. Örneğin insansız hava araçları [5], tuzak karşı önlem [6], [7], havan [8], füze [8]), uzun menzilli silahlar [9] ve yüksek hız uygulamaları [10], fizik uygulamaları [11]), titreşim testi [12] için elektromanyetik fırlatıcılar (EML) geliştirilmiştir. Uzun bir gelişim süreci olan elektromanyetik fırlatıcıların farklı geometride birçok çeşidi imal edilmiş ve performansı değerlendirilmiştir [13].…”

Section: Introductionunclassified

A new magnetic launcher design and analysis: An ANSYS Maxwell application

Bicakcı

Çıtak

2023

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Bu çalışmada herhangi bir mekanik itici kullanmadan halka ve silindirik şeklindeki sabit mıknatıslardan oluşturulmuş yeni bir manyetik fırlatıcı tasarımı önerilmiştir. Tasarımda önce iki halka mıknatıs kullanılmış daha sonra her seferinde bir halka mıknatıs ilave edilerek fırlatıcı boyu değiştirilmiştir. Farklı boylardaki fırlatıcı tasarımlarında halka mıknatıslar arası mesafe sabit değerde arttırılmış ve fırlatılacak mıknatıs merminin kesiti de değişken tutulmuştur. ANSYS Maxwell simülasyon program kullanılarak oluşturulan boyları farklı her bir fırlatıcı tasarımı için mıknatıs mermiye uygulanan manyetik kuvvetin konuma göre değişimleri analiz sonrasında belirlenmiştir. Böylece mermi kesiti değişiminin ve fırlatıcı boyunun sabit kademelerle arttırılmasının manyetik kuvvete olan etkileri bulunmuştur. Ayrıca mermiye etkiyen manyetik kuvvette etkin rol oynayan halka mıknatıslar yerine bobin kullanılması durumunda bobin ile ilgili değişkenlerin belirlenmesine de çalışılmıştır. Böylece bobine verilecek değişken akıma göre itici kuvvetin de değiştirilebilir olması sağlanabilmiştir. Makalede fırlatıcı tasarımlarının ANSYS Maxwell programıyla oluşturulması ve elde edilen sonuçlar ayrıntılı olarak tartışılmıştır.

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Section: Introductionunclassified

A new magnetic launcher design and analysis: An ANSYS Maxwell application

Bicakcı

Çıtak

2023

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…During the past few years, railgun has achieved considerable development with a large amount of resource spent in [1]. The research involves various physical aspects, i.e., electricity, magnetism, thermodynamics, material, and so on.…”

Section: Introductionmentioning

confidence: 99%

Design and Testing a Novel Armature on Railgun

Guo

Zhang

Shao

et al. 2015

IEEE Trans. Plasma Sci.

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Based on understanding the characteristics of the impulse force generated by pulsed current of the armature, it is valuable to explore effective ways to improve the armature structure to enhance the stability and prevent from the transition and erosion during launching. This paper first lists a series of conversional armature and the characteristics of these armatures are illuminated. A C-shaped armature is simulated based on the electrical-magnetic-mechanical coupled analysis method. The simulation shows that the stress is mainly distributed in the area between the cross member and arm, it may lead to local deformation. A novel concave armature is proposed and the simulation results indicate that the stress is mainly distributed in the inner side of arm and the front of armature. It is beneficial to push heavy load and avoid deformation and fracture. A device is built to validate the feasibility of armature. The armature is staying still to simulate pushing the infinite heavy load. The experimental results show that the concave armature endures higher current and has the stronger capability of pushing load compared with the C-shaped armature. This type of armature provides a valuable reference for future armature design.Index Terms-Concave armature, C-shaped armature, experiment, simulation, solid armature.

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“…Recently, many researchers devoted to the investigation of the railgun plasma armature, and some theoretical analyses about the MHD effect of the plasma have been carried out [4][5][6][7]. Several 1-D and 2-D models have been developed, but it is impossible to completely account for multi-dimensional effects in 1-D or 2-D simulations [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional MHD modeling of railgun plasma armature with the CE/SE method

Gong

Wang

2014

JAE

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Three-dimensional (3-D) numerical simulations have been carried out taking into account the magnetohydrodynamics (MHD) effect of the railgun plasma armature. The 3-D space-time conservation element and solution element (CE/SE) method is derived for solving the coupled Navier-Stokes equations and Maxwell equations. The results show that a steeper gradient of the magnetic field and pressure that appears along the direction of the rail can be observed. The temperature distribution is affected by the boundary conditions for the radiative heat flux, with the maximum temperature appearing in the center near the base of the projectile. Circulation patterns of velocity that are evident in both the rail-to-rail plane and the insulator-to-insulator plane result from the convection and unbalanced force between the Lorentz force and pressure gradient. The periodical variation of the temperature and acceleration is obvious until a new steady state is achieved. This model can efficiently evaluate the dynamics of the plasma motion, and provide a basis on understanding the much more complex physical phenomena.

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Progress on Hypervelocity Railgun Research for Launch to Space

Cited by 7 publications

References 21 publications

A new magnetic launcher design and analysis: An ANSYS Maxwell application

A new magnetic launcher design and analysis: An ANSYS Maxwell application

Design and Testing a Novel Armature on Railgun

Three-dimensional MHD modeling of railgun plasma armature with the CE/SE method

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