Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Control Of Leading Edge Vortices On A Delta Wing full books in PDF, epub, and Kindle. Read online Control Of Leading Edge Vortices On A Delta Wing ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : C. Magness
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Control of Leading-edge Vortices on a Delta Wing written by C. Magness and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (227 download)
Download or read book Unsteady Structure of Leading-Edge Vortices on a Delta Wing written by and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this research program was to characterize the unsteady flow structure on wings having swept edges. Wings were subjected to global control, involving motion of the entire wing, and local control, involving perturbations at specified locations on the surface of the wing. New types of experimental facilities and image acquisition and processing techniques have allowed determination of the instantaneous vorticity distributions and streamline patterns of the flow. The occurrence of vortex breakdown and stall and their phase shifts relative to the wing motion and to control at the leading-edges have been interpreted in terms of new flow mechanisms. Delta Wings, Vortex Breakdown, Laser Diagnostics.
Author : H. Q. Yang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Control of Vortex Breakdown on a Delta Wing by Leading Edge Blowing and Suction written by H. Q. Yang and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anja Kölzsch
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (12 download)
Download or read book Active Flow Control of Delta Wing Leading-Edge Vortices written by Anja Kölzsch and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohamed Gad-el-Hak
Publisher :
ISBN 13 :
Total Pages : 86 pages
Book Rating : 4.:/5 (227 download)
Download or read book Development of a Device for Controlling the Leading Edge Vortices on a Delta Wing written by Mohamed Gad-el-Hak and published by . This book was released on 1986 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent experimental observations have shown that a leading edge vortex on a delta wing at constant angle of attack consists of a series of discrete smaller vortices. These vortices pair, much the same as in a free shear layer. A device is proposed to modulate the shedding and the pairing of the discrete vortices by mechanically or acoustically perturbing the leading edge of a delta wing. By applying the perturbation to both leading edges, the total lift of a wing will be altered; alternatively, by using the perturbation preferentially on only one side of the wing, the rolling moment around the axis of symmetry of the aircraft is controlled. The proposed device will enable the pilot of a fighter aircraft to achieve a previously unattained degree of maneuverability. During the first phase of this research, experiments were conducted in both a water towing tank and a high speed wind tunnel. Flow visualization, fast-response velocity probe surveys, as well as force measurements were conducted to assess the performance of the proposed vortex control device and, more importantly at this early stage of the research, to understand the complex flow field under consideration. Keywords: Vortex control device; Lift control; Lift enhancement; Super-maneuverability.
Author : Richard M. Wood
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (317 download)
Download or read book Influence of Airfoil Geometry on Delta Wing Leading-edge Vortices and Vortex-induced Aerodynamics at Supersonic Speeds written by Richard M. Wood and published by . This book was released on 1992 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. T. Lee
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.F/5 ( download)
Download or read book Controlled Vortical Flow on Delta Wings Through Unsteady Leading Edge Blowing written by K. T. Lee and published by . This book was released on 1990 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Adm Nasa
Publisher :
ISBN 13 : 9781731351593
Total Pages : 162 pages
Book Rating : 4.3/5 (515 download)
Download or read book Controlled Vortical Flow on Delta Wings Through Unsteady Leading Edge Blowing written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-18 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vortical flow over a delta wing contributes an important part of the lift - the so called nonlinear lift. Controlling this vortical flow with its favorable influence would enhance aircraft maneuverability at high angle of attack. Several previous studies have shown that control of the vortical flow field is possible through the use of blowing jets. The present experimental research studies vortical flow control by applying a new blowing scheme to the rounded leading edge of a delta wing; this blowing scheme is called Tangential Leading Edge Blowing (TLEB). Vortical flow response both to steady blowing and to unsteady blowing is investigated. It is found that TLEB can redevelop stable, strong vortices even in the post-stall angle of attack regime. Analysis of the steady data shows that the effect of leading edge blowing can be interpreted as an effective change in angle of attack. The examination of the fundamental time scales for vortical flow re-organization after the application of blowing for different initial states of the flow field is studied. Different time scales for flow re-organization are shown to depend upon the effective angle of attack. A faster response time can be achieved at angles of attack beyond stall by a suitable choice of the initial blowing momentum strength. Consequently, TLEB shows the potential of controlling the vortical flow over a wide range of angles of attack; i.e., in both for pre-stall and post-stall conditions. Lee, K. T. and Roberts, Leonard BLOWING; DELTA WINGS; FLOW DISTRIBUTION; LEADING EDGES; VORTICES; AIRCRAFT MANEUVERS; ANGLE OF ATTACK; MOMENTUM; NONLINEARITY; STABILITY...
Author : Hafiz Rehman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (88 download)
Download or read book Control of Leading Edge Vortices Using Apex Flap Over Non-slender Delta Wing written by Hafiz Rehman and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : T. Karagounis
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Generation and Control of Separated Vortices Over a Delta Wing by Means of Leading Edge Flaps written by T. Karagounis and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohamed Gad-el-Hak
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.3/5 (91 download)
Download or read book Development of a Device for Controlling the Leading Edge Vortices Ona Delta Wing written by Mohamed Gad-el-Hak and published by . This book was released on 1986 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anthony M. Mitchell
Publisher :
ISBN 13 : 9781423535225
Total Pages : 380 pages
Book Rating : 4.5/5 (352 download)
Download or read book Characterization and Control of Vortex Breakdown Over a Delta Wing at High Angles of Attack written by Anthony M. Mitchell and published by . This book was released on 2000-08-01 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demands for more maneuverable and stealthy air vehicles have encouraged the development of new control concepts for separated flows. The goalof this research is the control of leading-edge vortex breakdown by open-loop, along-the-core blowing near the apex of a delta wing to improve lift and maneuverability at high angles of attack. Control is dependent on the knowledge of and the ability to detect principle characteristics of the phenomena. Therefore, an experimental study of a 700 delta wing was accomplished to better understand the physical properties of the vortical flow and the vortex breakdownphenomena. Multiple experimental methods were used to characterize the flow field and its influence on the model's surfaces as well as to identify parameters for closed-loop feedback control.
Author : Yong Liu
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.3/5 (91 download)
Download or read book Reactive Flow Control of Delta Wing Vortex written by Yong Liu and published by . This book was released on 2006 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, the reactive flow control of delta wing leading edge vortices using along-core pulse width modulation (PWM) flow injection is presented. Leading edge vortices on the upper surface of a delta wing can augment lift. Manipulating breakdown points of leading edge vortices can effectively change the delta wing's lift and drag and generate attitude control torque. In this paper, a dynamic model of active flow control of vortex break down points is identified from wind tunnel data using a model scheduling method. Based on the identified model, a closed-loop active flow controller is developed. Simulation and real-time wind tunnel test show that the closed-loop controller can effectively manipulate the upper surface pressure of the delta wing, which indicates the closed-loop controller can effectively control vortex breakdown points.
Author : Francis M. Payne
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (31 download)
Download or read book Visualization of Leading Edge Vortices on a Series of Flat Plate Delta Wings written by Francis M. Payne and published by . This book was released on 1991 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E. Ann Bare
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (31 download)
Download or read book Flow Field Over the Wing of a Delta-wing Fighter Model with Vortex Control Devices at Mach 0.6 to 1.2 written by E. Ann Bare and published by . This book was released on 1992 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Farhad Ghaffari
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (317 download)
Download or read book An Analytical Design Procedure for the Determination of Effective Leading Edge Extensions on Thick Delta Wings written by Farhad Ghaffari and published by . This book was released on 1984 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jose Rullan
Publisher :
ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.3/5 (91 download)
Download or read book Flow Control Over Sharp-edged Wings written by Jose Rullan and published by . This book was released on 2007 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wings swept by 30 to 40 degrees with sharp leading edges are today very common on flghter aircraft. There is very little work devoted to the understanding of the aerodynamics of such wings. The problem is that such wings may be able to sustain attached flow, even if their tip vortices are broken down, or stall like two-dimensional wings. The aerodynamics of such wings were studied and investigated experimentally. Pressure distributions and velocity fields were obtained in a wind tunnel and a water tunnel. The effectiveness of leading-edge control of the flow over such wings was explored. Oscillating mini-flaps and pulsed jets along the leading edge were employed. The results indicate that two-D-like vortices are periodically generated and shed. It was also discovered that an underline feature of the flow, a streamwise vortex is periodically activated, penetrating the separated flow, eventually emerging downstream of the trailing edge of the wing. The results indicate that significant increases in tilt can be achieved in the average, by managing the development of streamwise and spanwise vortices. The technique is effective in the range of angles of attack of 10 to 20 degrees, for which the uncontrolled flow is stalled.
