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Author : S. Bhattacharyya
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Structure of the Rotor Wake in Ground Effect written by S. Bhattacharyya and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Devi Prasad Pulla
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.:/5 (575 download)
Download or read book The Long Time Structure of the Rotor Wake in Ground Effect written by Devi Prasad Pulla and published by . This book was released on 2004 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (317 download)
Download or read book Analytical Model of Rotor Wake Aerodynamics in Ground Effect written by and published by . This book was released on 1983 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : I. Kusmarwanto
Publisher :
ISBN 13 : 9780947767211
Total Pages : 210 pages
Book Rating : 4.7/5 (672 download)
Download or read book Ground Effect on a Rotor Wake written by I. Kusmarwanto and published by . This book was released on 1985 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Harry H. Heyson
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (31 download)
Download or read book An Evaluation of Linearized Vortex Theory as Applied to Single and Multiple Rotors Hovering in and Out of Ground Effect written by Harry H. Heyson and published by . This book was released on 1959 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Devi Prasad Pulla
Publisher :
ISBN 13 :
Total Pages : 197 pages
Book Rating : 4.:/5 (77 download)
Download or read book A Study of Helicopter Aerodynamics in Ground Effect written by Devi Prasad Pulla and published by . This book was released on 2006 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The flow around a helicopter is very complex; it becomes much more complex when it comes close to the ground. The presence of the ground changes the aerodynamic characteristics of the rotor and the flow environment becomes much more complex compared with that of flight out-of-ground effect (OGE) and hence the behavior of the rotor wake in the vicinity of the ground is challenging to predict. Under in-ground-effect(IGE) conditions, the wake collides with the ground and causes a significant perturbation to the flow near the blade. Significant interactions between the main rotor wake and the ground have been associated with the formation and passage of the ground vortex in forward flight. The presence of a ground vortex affects the handling qualities of the helicopter. The aim of this research is to capture the physics of the flow features and dynamics of ground effect flows around a rotorcraft, provide an understanding of the rotor wake/vortices near the ground, and generate rigorous models to accurately predict handling qualities, loads and moments acting on the rotor and the power requirements. The wake structure after periodicity is reached is obtained for hover and different forward flight speeds. Also, the nature of the flowfield, as well as the formation of the ground vortex, is understood by obtaining the velocity contours on a longitudinal plane containing the rotor blade after periodicity is obtained. The unsteadiness in the velocities is quantified by obtaining the RMS deviation in velocities on different planes containing the tail rotor around the rotor disk simulating the various kinds of flight. Thrust and power requirements on the rotor disk have been predicted and have been successfully validated by comparison with experimental results obtained from Georgia Institute of Technology.
Author : E. A. Bound
Publisher :
ISBN 13 : 9780902937932
Total Pages : 29 pages
Book Rating : 4.9/5 (379 download)
Download or read book Ground Effect on a Rotor Wake written by E. A. Bound and published by . This book was released on 1983 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nita Darshini Nathan
Publisher :
ISBN 13 :
Total Pages : 265 pages
Book Rating : 4.:/5 (673 download)
Download or read book The Rotor Wake in Ground Effect and Its Investigation in a Wind Tunnel written by Nita Darshini Nathan and published by . This book was released on 2010 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Daniel A. Griffiths
Publisher :
ISBN 13 :
Total Pages : 304 pages
Book Rating : 4.:/5 (484 download)
Download or read book A Study of Multi-rotor Interference and Ground Effect Using a Free-vortex Wake Model written by Daniel A. Griffiths and published by . This book was released on 2001 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : F. A. DuWaldt
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.E/5 ( download)
Download or read book Wakes of Lifting Propellers (rotors) in Ground Effect written by F. A. DuWaldt and published by . This book was released on 1966 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents the development of a wake model for a lifting propeller (rotor) in ground effect and the computational procedure used to determine the spacial distribution of wake vorticity and the induced velocity field accompanying that vorticity distribution. Sample calculations for a two-bladed rotor were carried out on an IBM 7044 computer. Locations of wake vortical elements and the associated induced velocities at selected field points are presented for advance ratios of 0, 0.02, 0.05, and 0.10 for an H/R (ratio of rotor height above ground to rotor radius) of 1.0. Also, a few results for a hovering case with H/R = 0.5 are presented. A calculated root-mean-square velocity map is compared with measured hovering data (time averaged) and good agreement is obtained in the outer half of the slipstream. The implications of computed results with respect to the flow field at a horizontal stabilizer or tail rotor are noted as examples of the use of the model. The wake vortex model used for these calculations is a distorted continuous helix emanating from each blade tip. (Author).
Author : P. Dhar
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (11 download)
Download or read book A Comparative Sudy of a Rotor Wake in Ground Effect Under Simulated Wind Tunnel Conditions and During Field Trials written by P. Dhar and published by . This book was released on 1989 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (317 download)
Download or read book Application of the Wide-field Shadowgraph Technique to Rotor Wake Visualization written by and published by . This book was released on 1989 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Raghavendran Mahalingam
Publisher :
ISBN 13 :
Total Pages : 418 pages
Book Rating : 4.:/5 (434 download)
Download or read book Structure of the Near Wake of a Rotor in Forward Flight and Its Effect on Surface Interactions written by Raghavendran Mahalingam and published by . This book was released on 1999 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jeremy R. Maunus
Publisher :
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (757 download)
Download or read book Effect of Rotor Wake Structure on Fan Interaction Noise written by Jeremy R. Maunus and published by . This book was released on 2011 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xinguo Zhang
Publisher : Springer
ISBN 13 : 981133305X
Total Pages : 3068 pages
Book Rating : 4.8/5 (113 download)
Download or read book The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018) written by Xinguo Zhang and published by Springer. This book was released on 2019-06-08 with total page 3068 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of peer-reviewed papers from the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018). The symposium is a common endeavour between the four national aerospace societies in China, Australia, Korea and Japan, namely, the Chinese Society of Aeronautics and Astronautics (CSAA), Royal Aeronautical Society Australian Division (RAeS Australian Division), the Korean Society for Aeronautical and Space Sciences (KSAS) and the Japan Society for Aeronautical and Space Sciences (JSASS). APISAT is an annual event initiated in 2009 to provide an opportunity for researchers and engineers from Asia-Pacific countries to discuss current and future advanced topics in aeronautical and space engineering.
Author : Kirill V. Rozhdestvensky
Publisher : Springer Science & Business Media
ISBN 13 : 3662042401
Total Pages : 358 pages
Book Rating : 4.6/5 (62 download)
Download or read book Aerodynamics of a Lifting System in Extreme Ground Effect written by Kirill V. Rozhdestvensky and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to the memory of a distinguished Russian engineer, Rostislav E. Alexeyev, who was the first in the world to develop the largest ground effect machine - Ekranoplan. One of Alexeyev's design concepts with the aerodynamic configuration of a jlying wing can be seen on the front page. The book presents a description of a mathematical model of flow past a lifting system, performing steady and unsteady motions in close proximity to the underlying solid surface (ground). This case is interesting for practical purposes because both the aerodynamic and the economic efficiency of the system near the ground are most pronounced. Use of the method of matched asymptotic expansions enables closed form solutions for the aerodynamic characteristics of the wings-in-ground effect. These can be used for design, identification, and processing of experimental data in the course of developing ground effect vehicles. The term extreme ground effect, widely used through out the book, is associated with very small relative ground clearances of the order of 10% or less. The theory of a lifting surface, moving in immediate proximity to the ground, represents one of the few limiting cases that can be treated analytically. The author would like to acknowledge that this work has been influenced by the ideas of Professor Sheila E. Widnall, who was the first to apply the matched asymptotics techniques to treat lifting flows with the ground effect. Saint Petersburg, Russia February 2000 Kirill V. Rozhdestvensky Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Author : J. Zbrozek
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (15 download)
Download or read book Ground Effect on the Lifting Rotor written by J. Zbrozek and published by . This book was released on 1947 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
