Results 231 to 240 of about 10,835 (274)
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Validation of a multipoint approach for modeling spin aerodynamics
Journal of Aircraft, 1995during 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. The maximum and minimum values of the free-spin results are approximately equal to the rotary balance ...
Paul T. Jaramillo +2 more
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Aerodynamic Coefficients of a Microspoiler for Spin-Stabilized Projectiles
Journal of Spacecraft and Rockets, 2023In this paper, the aerodynamic coefficients of a microspoiler for a spin-stabilized projectile are studied using a computational fluid dynamics (CFD) simulation. To guarantee an effective study, the CFD simulation methodology is validated by the current literature and a wind-tunnel test.
Sijiang Chang, Dongyang Li
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Experimental determination of the aerodynamic coefficients of spinning bodies
The Aeronautical Journal, 2019ABSTRACTTo accurately predict the probabilities of impact damage to aircraft from runway debris, it is important to understand and quantify the aerodynamic forces that contribute to runway debris lofting. These lift and drag forces were therefore measured in experiments with various bodies spun over a range of angular velocities and Reynolds numbers ...
S. Nguyen +4 more
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Aerodynamic Characteristics of Fighter Configurations During Spin Entries and Developed Spins
Journal of Aircraft, 1978The NASA Langley Research Center is currently conducting a stall/spin research program to define fighter aerodynamics applicable during spin entries and developed spins and to develop analytical methods to use such measured aerodynamics for theoretically calculating these spin motions.
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Aerodynamic Data for Spinning Projectiles
1952Abstract : This is a collection of the physical and aerodynamic data of spinning projectiles (excluding spin-stabilized rockets) which have been obtained experimentally in the U.S. during the past decade. Some theoretical and empirical formulas are included. The index classifies the projectiles according to their shape.
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An Investigation of the Aerodynamic Performance of the Spin-Wing Concept
1998Abstract : Unmanned air vehicles (UAV's) capable of vertical takeoff and landing (VTOL) are always of interest to the Navy. This paper examines the aerodynamic performance of a unique multi-mode aircraft concept called the spin-wing/stop rotor. The spin wing uses its wing and tail as a counter-rotating rotor system for hovering flight.
Andrea B. Walden, Steven K. Tayman
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An evaluation of aerodynamics modeling of spinning light airplanes
21st Aerospace Sciences Meeting, 1983This paper extends the application of the modified strip theory for wing body combination of a spinning light airplane reported earlier. In addition, to account for the contribution of the tail plane, the shielding effect on vertical tail under steady state spin condition is modeled from basic aerodynamic considerations.
B. PAMADI, L. TAYLOR, JR.
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Aerodynamic characteristics of a dual-spin projectile with canards
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2019Based on the three-dimensional Navier–Stokes (N–S) equations, using unsteady numerical technology, flow over a dual-spin projectile was simulated to investigate its aerodynamic characteristics during flight. Spin was achieved via the sliding mesh method.
Xiaodong Liu, Xiaosheng Wu, Jintao Yin
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Effect of transition on the aerodynamic characteristics of a spinning cone
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2017In order to study the effect of transition on the aerodynamic characteristics of a pointed cone at small angles of attack in supersonic flows, the [Formula: see text] transition model, γ transition model, and a trip wire applied with [Formula: see text] transition model coupled with the Reynolds-averaged Navier–Stokes equations were used to simulate ...
Qiao Zhang +3 more
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Aerodynamic characteristics of a spinning projectile with elastic deformation
Aerospace Science and Technology, 2016Abstract The elastic deformation of a spinning projectile with a large slenderness ratio influences its flight stability and maneuverability. Unsteady time-accurate simulation based on a dual-time stepping method and the dynamic mesh method were used to solve the unsteady Reynolds-averaged Navier–Stokes (URANS) equations and obtain the aerodynamic ...
Jintao Yin +3 more
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