Results 11 to 20 of about 402 (235)
Experimental Validation of Elliptical Fin-Opening Behavior
Shock and Vibration, 2003 An effort to improve the performance of ordnance has led to the consideration of the use of folding elliptical fins for projectile stabilization. A second order differential equation was used to model elliptical fin deployment history and accounts for ...
James M. Garner +2 more
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Aerodynamic Analysis of a Spinning Missile with Dithering Canards [PDF]
Journal of Spacecraft and Rockets, 2002 A generic spinning missile with dithering canards is used to demonstrate the utility of an overset structured grid approach for simulating the aerodynamics of rolling airframe missile systems. The approach is used to generate a modest aerodynamic database for the generic missile.
Tor Nygaard, Robert Meakin
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Relativistic aerodynamics of spinning black holes [PDF]
Physical Review DAstrophysical black holes do not exist in vacuum, and their motion is affected by the galactic environment. As a black hole moves it attracts stars and matter, creating a wake that, in turn, exerts an effective friction slowing down the black hole. This force is known as dynamical friction, and has significant consequences, ranging from the formation ...
Dyson, Conor +3 more
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The aerodynamics of a spinning shell [PDF]
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1920 The paper to which this abstract is meant to serve as a non-technical introduction contains the results of work undertaken at the request of the Ordnance Committee and is published with their permission. (1) The Problems of Experimental External Ballistics .—A spinning shell moving through the air is subjected in ...
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Aerodynamic thermal analysis of a spinning winged projectile
Case Studies in Thermal Engineering, 2022 Aerodynamic heating of spinning flight vehicles have critical military applications such as flight testing, location tracking, stealth, and thermal protection. Based on the numerical method which is verified to be effective in the wind tunnel tests, this article discusses the aerodynamic thermal characteristics of a spinning winged projectile. Firstly,
Jun Zhang +6 more
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Defence Technology, 2019 This paper introduces a novel approach for controlling the exterior ballistic properties of spin-stabilized bullets by optimizing their internal mass distributions.
Janne Lahti +3 more
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Magnus Effect over Aerodynamic Components of Spinning Missile
International Journal of Aeronautical and Space Sciences, 2022 AbstractTo reveal the flow mechanism of the Magnus effect of the spinning missile, the flow field under supersonic conditions was numerically simulated based on the unsteady Reynolds-time-averaged Navier–Stokes equation, and the implicit dual-time stepping method and sliding mesh method were used.
Yi Gao, Juanmian Lei, Jintao Yin
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A comparison of Jabulani and Brazuca non-spin aerodynamics [PDF]
A comparison of Jabulani and Brazuca non-spin aerodynamics, 2014 Wind-tunnel experimental measurements of drag coefficients for non-spinning Jabulani and Brazuca balls are presented. The Brazuca ball’s critical drag speed is lower than that of the Jabulani ball, and the Brazuca ball’s super-critical drag coefficient is larger than that of the Jabulani ball.
John Eric Goff +2 more
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X. The aerodynamics of a spinning shell [PDF]
Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character, 1921 This paper contains the results, theoretical and experimental, of work undertaken, at the request of the Ordnance Committee, by the authors as Technical Officers of the Munitions Inventions Department. Permission to publish such parts as appear to be of general scientific interest has now been granted by the Ordnance Committee and the Director of ...
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Nonlinear Model and Ballistic Impact of Body Aerodynamics for Canard Dual-Spin Aircraft
AerospaceTargeting the nonlinear issues of the canard dual-spin aircraft, which relies on the high-speed rotation of the afterbody for flight stability and achieves trajectory correction by adjusting the roll angle of the low-speed rotating forebody to alter ...
Xinxin Zhao +3 more
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