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Aerodynamic and flight dynamic interaction in spin
Aircraft Engineering and Aerospace Technology, 2019PurposeThe purpose of this paper is to describe an integrated approach to spin analysis based on 6-DOF (degrees of freedom) fully nonlinear equations of motion and a three-dimensional multigrid Euler method used to specify a flow model. Another purpose of this study is to investigate military trainer performance during a developed phase of a ...
Ewa Marcinkiewicz +2 more
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Effect of a soccer ball’s seam geometry on its aerodynamics and trajectory
Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, 2020Five different soccer balls, each possessing the traditional 32-panel surface design, were tested in a wind tunnel. Only seam depth and width varied between the balls.
J. Goff, Sungchan Hong, T. Asai
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Aerodynamic Data for Spinning Projectiles [PDF]
, 1952 Abstract : 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 [PDF]
, 1998 Abstract : 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.
Steven K. Tayman, Andrea B. Walden
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A Novel Trajectory-Based Ball Spin Estimation Method for Table Tennis Robot
IEEE transactions on industrial electronics (1982. Print)Sport and game industry has grown rapidly in recent years due to the application of novel sensors and algorithms for quantitative analysis. For example, flying speed and spin estimation is essential to help players to improve their skills in table tennis.
Yuxin Wang +9 more
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Proceedings of the Vertical Flight Society 80th Annual Forum
A blade-tip-propeller driven rotor consists of small electric motors and propellers attached to the rotor blade tip to spin the main rotor. This study address a propeller driven shortcoming that was identified in previous research: a high required ...
Robert Brown, Inderjit Chopra
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A blade-tip-propeller driven rotor consists of small electric motors and propellers attached to the rotor blade tip to spin the main rotor. This study address a propeller driven shortcoming that was identified in previous research: a high required ...
Robert Brown, Inderjit Chopra
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Frequency Topology Optimization of Fan Blade Considering Stress Stiffening and Spin Softening
Volume 12D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in TurbomachineryFan blades are prone to failures due to dynamic loads and their optimal design ensures the stability of aircraft engines. Compared with the shape and parameter optimization, topology optimization design has a larger design space and frequency ...
Shenli Xu +3 more
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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 ...
Jintao Yin +3 more
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SINGLE AND MULTI-OBJECTIVE OPTIMIZATION OF THE AERODYNAMICS OF PROJECTILES USING GENETIC ALGORITHMS
Ballistics 2025This paper is devoted to the use of genetic algorithms (GA) in order to optimize the aerodynamic of projectiles. The single and multi-objective optimization framework PYMOO [1] is used in conjunction with PRODAS software [2], a semi-empirical software ...
Mickael Zeidler +2 more
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