Results 161 to 170 of about 1,019,352 (234)

Complex Aerodynamics Behavior of High Spin APFSDS Projectile

Journal of Applied Mechanics, 2013
The supersonic aerodynamics of a high spin armor-piercing fin-stabilized discarding sabot projectile (APFSDS) is numerically and experimentally investigated. Classically, using a 120 mm smooth bore gun, the value of the nondimensional steady spin rate of the inflight APFSDS projectile is about 0.01.
R. Cayzac, E. Carette, S. Heddadj
semanticscholar   +4 more sources

Longitudinal Aerodynamics of a Canard Guided Spin Stabilized Projectile

Advanced Materials Research, 2012
Navier–Stokes simulation is performed on a canard guided spinning projectile for different attack angles and circumferential position angles of canard over the Mach number range of 1.8–2.2. The computational Magnus moment coefficients of test case are validated with available experimental data of a Secant-Ogive-Cylinder-Boattail (SOCBT) configuration ...
X. Ji, Hai Wang, S. Zeng, C. Jia
semanticscholar   +4 more sources

Effects of Base Shape on Spin-Stabilized Projectile Aerodynamics [PDF]

26th AIAA Applied Aerodynamics Conference, 2008
J. Despirito
semanticscholar   +3 more sources

Aerodynamics of a Spinning Sphere

The Journal of the Royal Aeronautical Society, 1928
The full equations of motion for the flow of a viscous fluid have proved too complicated for any general solution to be obtained. It is to be doubted if, in. the near future, the problem of fluid motion will be solved in a general manner, although solutions for a few special cases may be found.
J. W. Maccoll
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Validation of a multipoint approach for modeling spin aerodynamics

Journal of Aircraft, 1995
during the spin. The rolling-moment and yawing-moment coefficient variations were relatively small, and thus, the steadyspin assumption is reasonable for these quantities. In contrast is the large amplitude of the pitching moment coefficient trace.
Paul T. Jaramillo, Youngseung Cho, M. Nagati   +2 more
semanticscholar   +3 more sources

Aerodynamics and Design of Spinning Samara Model

, 2021
A particular form of winged seed (samara) dispersal technique adopted by nature uses autorotative (unpowered rotation of the wing generating thrust force against gravity) descent; for e.g. in Maple and Mahagony trees. This technique provides the lowest descent velocities among various seed dispersal techniques found in nature ensuring the safety of the
Govindharaj Yogeshwaran, Srisha M. V. Rao, Jagadeesh Gopalan   +2 more
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Aerodynamics of spinning and non-spinning tennis balls

Journal of Wind Engineering and Industrial Aerodynamics, 2004
The aerodynamic properties of a tennis ball are obtained using wind tunnel measurements. In the first phase of this study, the drag coefficient of a variety of new and used non-spinning tennis balls was measured. The measurements were conducted in the Reynolds number range of 85×103 In the second phase of this study, the drag and lift coefficients ...
Simon Goodwill, S. B. Chin, Steve Haake
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New Rotation-Balance Apparatus for Measuring Airplane Spin Aerodynamics in the Wind Tunnel

, 1978
An advanced rotation-balance apparatus has been developed for the Ames 12-ft Pressure Wind Tunnel to study the effects of spin rate, angles of attack and sideslip, and, particularly, Reynolds number on the aerodynamics of fighter and general aviation ...
G. Malcolm
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Unsteady aerodynamics computation and investigation of magnus effect on computed trajectory of spinning projectile from subsonic to supersonic speeds

Aeronautical Journal, 2019
This paper describes the extensive numerical investigation carried out on a 203-mm spin-stabilised projectile to study the effects of Magnus force at high angles of attack on the stability and flight-trajectory parameters, for further validation and ...
F. A. Chughtai, J. Masud, S. Akhtar
semanticscholar   +2 more sources

Subsonic Aerodynamics of Spinning and Non-Spinning Type 200 Lightcraft: Progress Report

AIP Conference Proceedings, 2010
A combined experimental and numerical investigation of subsonic aerodynamics for Type 200 laser lightcraft is underway for both spinning and non‐spinning cases. A 12.2 cm diameter aluminum model with a “closed” annular airbreathing inlet was fitted to a sting balance in RPI’s 61 cm by 61 cm subsonic wind tunnel.
David A. Kenoyer, Leik Myrabo, Claude Phipps, Kimiya Komurasaki, John Sinko   +4 more
openalex   +3 more sources