Results 21 to 30 of about 87,747 (212)

A Computer Software Application for the Design and Simulation of Unguided Rockets [PDF]

open access: yesProblemy Mechatroniki, 2020
The paper presents a specification and performance characteristics of a computer software application developed for rocket design engineering. The methodology for the determination of aerodynamic characteristics by the software application is based on ...
Krzysztof MOTYL, Filip MUSIAŁEK
doaj   +1 more source

Investigation on Stability and Galloping Characteristics of Iced Quad Bundle Conductor

open access: yesJournal of Applied Fluid Mechanics, 2021
The stability and galloping characteristics of iced quad bundle conductor are studied in this paper. Firstly, the aerodynamic coefficients of iced quad bundle conductor and single conductor under four different working conditions are obtained by wind ...
X. Liu, G. Min, C. Sun, M. Cai
doaj  

Establishment of CNN and Encoder–Decoder Models for the Prediction of Characteristics of Flow and Heat Transfer around NACA Sections

open access: yesEnergies, 2022
The present study established two different models based on the convolutional neural network (CNN) and the encoder–decoder (ED) to predict the characteristics of the flow and heat transfer around the NACA sections.
Janghoon Seo, Hyun-Sik Yoon, Min-Il Kim
doaj   +1 more source

Smolyak-Grid-Based Flutter Analysis with the Stochastic Aerodynamic Uncertainty

open access: yesDiscrete Dynamics in Nature and Society, 2014
How to estimate the stochastic aerodynamic parametric uncertainty on aeroelastic stability is studied in this current work. The aerodynamic uncertainty is more complicated than the structural one, and it takes more significant effect on the flutter ...
Yuting Dai, Chao Yang
doaj   +1 more source

Calculation accuracy of wing aerodynamic parameters for a low speed aircraft

open access: yesGeodesy and Cartography, 2012
The article presents the analysis results of calculation error for a swept wing of NACA4415 airfoil. Coefficients of aerodynamic forces for this wing were calculated by means of a vortex step method including special algorithm to account non-linear ...
Egidijus Pakalnis, Jonas Stankūnas
doaj   +1 more source

Investigation of wheelhouse shapes on the aerodynamic characteristics of a generic car model

open access: yesAdvances in Mechanical Engineering, 2021
As vehicle speed increases, the aerodynamic drag reduction becomes increasingly significant. The aim of this paper is to find out the effects of the wheelhouse shapes on the aerodynamics of an Ahmed body with a 35 slant angle. In this paper, based on the
Haichao Zhou   +4 more
doaj   +1 more source

On the Self-Calibration of Aerodynamic Coefficients in Vehicle Dynamic Model-Based Navigation

open access: yesDrones, 2020
The performance of vehicle dynamic model (VDM)-based navigation largely depends on the accurate determination of aerodynamic coefficients that are unknown a priori.
Gabriel Laupré, Jan Skaloud
doaj   +1 more source

Dynamic modelling of parafoil system based on aerodynamic coefficients identification

open access: yesAutomatika, 2023
This study focuses on the identification of aerodynamic coefficients through airdrop data based on a known six-degree-of-freedom (6-DOF) model. Since the precise modelling of the parafoil system is a prerequisite for design of guidance, navigation and ...
Ligan Zhao   +3 more
doaj   +1 more source

Aerodynamic influence coefficient method using singularity splines [PDF]

open access: yes11th Aerospace Sciences Meeting, 1973
A numerical lifting surface formulation, including computed results for planar wing cases is presented. This formulation, referred to as the vortex spline scheme, combines the adaptability to complex shapes offered by paneling schemes with the smoothness and accuracy of loading function methods.
J. MERCER, J. WEBER, E. LESFERD
openaire   +1 more source

DESIGN OF THE ROBUST PID CONTROL FOR UNCERTAIN NONLINEAR MODEL OF THE UAV USING ARTIFICIAL GAIN AND TIME-DELAY MODEL

open access: yesРадіоелектронні і комп'ютерні системи, 2019
Estimations of the flight vehicles aerodynamic coefficients through the theoretical, numerical, wind tunnel and flight-test methods have always errors and uncertainties.
Фархади Рахман Мохаммади   +1 more
doaj   +1 more source

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