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Showing 1 to 17 of 17 for “"Aerodynamic behavior"”.
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Numerical Simulation of Three-Dimensional Aerodynamic Behavior of a Yawed, Inclined Circular Cylinder
The effects of the angle of the cylinder to the flow on characteristics of the flow and the associated forces were also examined in this study. As yaw angle increases, the peak frequency of Cy deviates from the prediction by the Cosine Rule. The dominant frequency of Cx has a relatively …
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Reynolds number effects on the unsteady aerodynamic behavior of an NACA 0012 airfoil
Thesis: M.S., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1986
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Experimental and Computational Analysis of a 3D Printed Wing Structure
… Dynamics (CSD) can obtain full structural and aerodynamic behavior of a deformable aircraft. However, these models are so large that pose a significant challenge from the control systems design perspective. Thus, the development of an aeroelastic modeling software that can be used for further …
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Understanding, modeling and improving the development of complex products : method and study
… requirements for weight, cost, strength, and aerodynamic behavior create many interdependencies in the product design, which translate through to the design process. An increasing fragmentation of the commercial aerospace industry has also added a dimension of complexity to the process - …
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Simulations of a passively actuated oscillating airfoil using a discontinuous Galerkin method
… to further understand the non-traditional flow aerodynamics in which they operate. Undeniably the success of biological flapping flight is the exploitation of fluid structure interaction response i.e. wing mechanics, deformation, and morphing. Even though all these features are encountered in …
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Aerodynamic drag on deformable and active structures in high Reynolds number conditions
We explore the effect of topography on the aerodynamic behavior of deformable structures, at high Reynolds numbers. We first introduce a novel mechanism to control the aerodynamic drag on cylinders, in the critical Reynolds number regime. We created both axially grooved and dimpled specimens, …
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A Study of Aerodynamics in Kevlar-Wall Test Sections
This study is undertaken to characterize the aerodynamic behavior of Kevlar-wall test sections and specifically those containing two-dimensional, lifting models. The performance of the Kevlar-wall test section can be evaluated against the standard of the hard-wall test section, which in the case of …
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Dynamic flow quality measurements in a transonic cryogenic wind tunnel
… all flow parameters of interest can be deduced. Aerodynamic behavior of a full size model of the probe was established in an open air jet of known conditions.
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Numerické simulace transportu a depozice vláken v zjednodušeném modelu dýchacích cest
… of human airways. Fibers exhibit different aerodynamic behavior than spherical particles, causing different deposition patterns. To investigate this phenomenon, a computational fluid dynamics simulation setup is constructed in Simcenter STAR CCM+ using a model of the human airway. The …
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In vivo imaging and morphogenesis of butterfly scale development
… characteristics, thermodynamic properties, and aerodynamic behavior. This strategy—of enabling multifunctionality by controlling material structure across relevant length scales—can be emulated in bioinspired materials. However, the range of structural length scales that are integrated in …
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Effect of Nozzle Pressure Ratio on Thrust and Flow Behavior in a Supersonic De Laval Nozzle
… degrading nozzle performance. Understanding the aerodynamic behavior of nozzles operating under off-design conditions is therefore important for improving propulsion system performance and stability. In particular, direct thrust measurements provide a key metric for evaluating nozzle efficiency …
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Ducted Fan Aerodynamics and Modeling, with Applications of Steady and Synthetic Jet Flow Control
… a target is essential. However, the ducted fan's aerodynamic characteristics pose difficulties for stable vehicle flight and therefore require complex control algorithms. In particular, they exhibit a large nose-up pitching moment during wind gusts and when transitioning from hover to forward …
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Understanding and Exploiting Wind Tunnels with Porous Flexible Walls for Aerodynamic Measurement
The aerodynamic behavior of wind tunnels with porous, flexible walls formed from tensioned Kevlar has been characterized and new measurement techniques in such wind tunnels explored. The objective is to bring the aerodynamic capabilities of so-called Kevlar-wall test sections in-line with those of …
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Flying snakes: Aerodynamics of body cross-sectional shape
… fore-aft symmetry. This study investigated the aerodynamic performance of this unique shape by simulating a single, static segment of the snake's body over a wide range of Reynolds numbers (3,000 to 15,000) and angles of attack (-10 to 60o) to simulate the full range of the snake's flight …
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Experimental and Numerical Investigations of the Aerodynamics of Flexible Inflatable Wings
… construction and durability, but challenges to aerodynamic performance arise out of their flexible nature and non-standard airfoil profile. Studying the aerodynamic behavior of such wings forms the critical focus of this research. This effort primarily encompasses an experimental investigation …
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Dinámica de osciladores aeroelásticos
… and during the structure service life. The main aerodynamic feature concerned with civil structures is that they are typi¬cally bluff and therefore it is not possible to make a theoretical treatment to determine their aerodynamic behavior. The civil aerodynamics in general, and civil …
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Πειραματική και υπολογιστική διερεύνηση αεροδυναμικής συμπεριφοράς πτερύγων σε διφασική ροή αέρα – νερού και εφαρμογή σε πτερύγια ανεμοκινητήρων
Αντικείμενο της παρούσας διδακτορικής διατριβής είναι η πειραματική και υπολογιστική διερεύνηση αεροδυναμικής συμπεριφοράς πτερύγων σε διφασική ροή αέρα–νερού και η εφαρμογή σε πτερύγια ανεμοκινητήρων. Αρχικά, γίνεται πειραματική και υπολογιστική μελέτη μονοφασικής ροής αέρα γύρω από αεροτομές, …