Aerodynamic drag

The increasing use of Intelligent Transport System (ITS) can enable very close vehicle spacings which generally results in a net drag reduction for the resulting convoys. The majority of vehicle development has, to date, been for vehicles in isolation, thus the study of interaction effects is becoming increasingly important. The main objective of this research is to investigate the use of Computational Fluid Dynamics (CFD) for understanding convoy aerodynamics and to further the understanding of airflow interaction between vehicles via CFD.

154p runthenight07 01-03-2023 4 2   Download

In this research the effect of ground proximity on the lift, drag and moment coefficients of inverted, two-dimensional aerofoils was investigated. The purpose of the study was to examine the effect ground proximity on aerofoils post stall, in an effort to evaluate the use of active aerodynamics to increase the performance of a race car. The aerofoils were tested at angles of attack ranging from 0° – 135°. The tests were performed at a Reynolds number of 2.16 x 105 based on chord length. Forces were calculated via the use of pressure taps along the centreline of the aerofoils.

144p runthenight07 01-03-2023 6 3   Download

In this paper, we present a research on applying a commercial Computational Fluid Dynamics (CFD) code to determine interaction effect between hull and accommodation on wind drag of a container ship. For the high superstructure and large windward area ships such as container, wind drag acting on hull accounts for a large amount of total resistance.

10p vielonmusk 21-01-2022 10 1   Download

In this study, the flow behavior and drag of the axisymmetric model at subsonic and supersonic speeds were investigated by a numerical approach. The numerical results were validated with previous experimental results to determine the model's accuracy.

10p vihassoplattner 04-01-2022 14 1   Download

The purpose of the research is to determine and compare the impact of some factors on aerodynamic drag force during the inflation of a parachute. The canopy’s shape (flat circular type and extended skirt 10% flat type), of the length of suspension lines (be in proportion to nominal diameter from 0.6 to 1.5) are considered. Measurement of the drag force of the parachute models is carried out in an open return wind tunnel.

8p spiritedaway36 28-11-2021 6 1   Download

Ebook Flight physics – Essential of aeronautical disciplines and technology, with historical notes: Part 1 present content history of aviation; introduction to atmospheric flight; low-speed aerodynamics; lift and drag at low speeds.

260p kethamoi6 01-07-2020 8 2   Download

The test used Reynolds number 6.577 x 103 on a 1: 100 scale model. Testing was conducted at varying the angle of attack of 0° - 60°. The flow visualization was measured using dye injection method. The result of the research using GAMA water tunnel showed the aerodynamic force and vortex dynamics phenomenon that showed the difference in lift and drag coefficients. The results of this visualization showed the formation of vortex nuclei that occur in the wings of the aircraft model.

9p cleopatrahuynh 01-06-2020 8 0   Download

....CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2010 by Taylor and Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group, an Informa business No claim to original U.S. Government works Printed in the United States of America on acid-free paper 10 9 8 7 6 5 4 3 2 1 International Standard Book Number: 978-1-4200-5398-2 (Hardback) This book contains information obtained from authentic and highly regarded sources.

50p 123859674 02-07-2012 103 16   Download

The forces and moments the vehicle receives from the surrounding air depend more on the shape of the body than on the characteristics of the chassis. A detailed study of motor vehicle aerodynamics is thus beyond the scope of a book dealing with the automotive chassis. However, aerodynamic forces and moments have a large influence on the longitudinal performance of the vehicle, its handling and even its comfort, so it is not possible to neglect them altogether.

49p hiruscar 19-10-2010 68 7   Download