Results 11 to 20 of about 10,835 (274)
Bifurcation Flight Dynamic Analysis of a Strake-Wing Micro Aerial Vehicle
Applied Sciences, 2021 Non-linear phenomena are particularly important in -flight dynamics of micro-class unmanned aerial vehicles. Susceptibility to atmospheric turbulence and high manoeuvrability of such aircraft under critical flight conditions cover non-linear aerodynamics
Mirosław Nowakowski +3 more
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The Combined Influence of Spin and Roughness Frequency on Sphere Aerodynamics
Experiments in Fluids, 2023 Abstract In this paper, the lift and drag of spinning spheres roughened with macro roughness elements are examined. The velocity field of these same spheres in flight is measured with Particle Image Velocimetry (PIV). Several spheres with varying roughness are examined at various spin rates and fixed Reynolds number.
Jack Elliott +3 more
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Analysis of stability derivatives important to recovery from spin
Aviation, 2016 This paper describes the numerical analysis of light aircraft stability derivatives in a wide range of angles of attack, important for recovery from spin.
Marcin Figat, Zdobysław Goraj
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Jurnal Pendidikan Jasmani dan Olahraga, 2020 One of the main components of badminton games is shuttlecock. The shuttlecock home industries in Indonesia mainly employ for about 20-40 freelance workers. The workers in the home industries are able to produce 500-100 slops of shuttlecock daily.
Ucup Yusup, Agus Rusdiana
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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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Understanding the effect of seams on the aerodynamics of an association football [PDF]
, 2005 The aerodynamic properties of an association football were measured using a wind tunnel arrangement. A third scale model of a generic football (with seams) was used in addition to a 'mini-football'.
Carré M. J. +6 more
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Identification of roll damping coefficient using the free rotation method [PDF]
INCAS BulletinThe free rotation method represents the simplest method for roll damping coefficient identification in experimental aerodynamics. To apply this method, it is necessary to spin the model to a desired angular velocity and then release the model to spin ...
Ionut BUNESCU +3 more
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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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Effect of lift force on the aerodynamics of dust grains in the protoplanetary disk [PDF]
, 2014 We newly introduce lift force into the aerodynamics of dust grains in the protoplanetary disk. Although many authors have so far investigated the effects of the drag force, gravitational force and electric force on the dust grains, the lift force has ...
Kimura, Shigeo S., Yamaguchi, Masaki S.
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Investigation of the Aerodynamic Drag of Baseballs with Gyro Spin [PDF]
The 13th Conference of the International Sports Engineering Association, 2020 The following considers drag measurements of baseballs with backspin (spin axis horizontal and normal to trajectory) and gyro spin (spin axis parallel to trajectory) orientations. Balls were propelled through still air in a laboratory setting at 36 m/s and spin ranging from 1250 rpm to 1750 rpm.
Bin Lyu, Jeff Kensrud, Lloyd Smith
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