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Numerical Study Of Aerodynamic Characteristics Of Sweptback Wings Having Vortex Flows
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Book Synopsis Numerical Study of Aerodynamic Characteristics of Sweptback Wings Having Vortex Flows by : C. Subba Reddy
Download or read book Numerical Study of Aerodynamic Characteristics of Sweptback Wings Having Vortex Flows written by C. Subba Reddy and published by . This book was released on 1980 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Aerodynamic Characteristics of Wings Having Vortex Flow Using Different Numerical Codes by : G. L. Goglia
Download or read book Investigation of Aerodynamic Characteristics of Wings Having Vortex Flow Using Different Numerical Codes written by G. L. Goglia and published by . This book was released on 1980 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical Study of Aerodynamic Characteristics of Wings Having Vortex Flow by :
Download or read book Theoretical Study of Aerodynamic Characteristics of Wings Having Vortex Flow written by and published by . This book was released on 1979 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Aerodynamic Characteristics of Wings Having Vortex Flow Using Different Numerical Codes by : Sushil K. Chaturvedi
Download or read book An Investigation of Aerodynamic Characteristics of Wings Having Vortex Flow Using Different Numerical Codes written by Sushil K. Chaturvedi and published by . This book was released on 1984 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Aerodynamic Characteristics of Wings Having Vortex Flow Using Different Numerical Codes by :
Download or read book Investigation of Aerodynamic Characteristics of Wings Having Vortex Flow Using Different Numerical Codes written by and published by . This book was released on 1981 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical and experimental analysis of longitudinal and lateral aerodynamic characteristics of skewed wings at subsonic speeds to high angles of attack by : James M. Luckring
Download or read book Theoretical and experimental analysis of longitudinal and lateral aerodynamic characteristics of skewed wings at subsonic speeds to high angles of attack written by James M. Luckring and published by . This book was released on 1977 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of wing leading-edge radius and Reynolds number on longitudinal aerodynamic characteristics of highly swept wing-body configurations at subsonic speeds by : William P. Henderson
Download or read book Effects of wing leading-edge radius and Reynolds number on longitudinal aerodynamic characteristics of highly swept wing-body configurations at subsonic speeds written by William P. Henderson and published by . This book was released on 1976 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Aerodynamic Characteristics of Swept-back Wings in Subsonic Compressible Flow by : Kuang-chun Chou
Download or read book Aerodynamic Characteristics of Swept-back Wings in Subsonic Compressible Flow written by Kuang-chun Chou and published by . This book was released on 1953 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct Numerical Simulations, Resolvent Analysis, and Flow Control of Laminar Post-stall Wakes Around Finite Tapered Swept Wings by : Jean Helder Marques Ribeiro
Download or read book Direct Numerical Simulations, Resolvent Analysis, and Flow Control of Laminar Post-stall Wakes Around Finite Tapered Swept Wings written by Jean Helder Marques Ribeiro and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: External flows over wings is a traditional flow of interest in aerodynamics. Over the last century, research efforts were dedicated to studying the wake patterns that form in the flows around finite wings. Among others, we can pinpoint the wing tip vortex, the separation region that develops under adverse pressure gradient, and the coherent vortical structures. Thanks to these past efforts, we were able to significantly extend our knowledge in aerodynamics, which paved the way for an impressive evolution of aircraft designs in the last century. Over the years, commercial flight became an ordinary asset in our society. More recently, small and micro air vehicles have also reached the market, being operated by individuals who hold no necessary knowledge of the complexity of the Navier-Stokes equations. The advanced knowledge currently held on flight physics has played a fundamental role in the development of aircraft designs, however, there is still room for improvement. In post-stall flow conditions, the aerodynamic performance of the wing decays considerably, making it challenging to sustain flight at high incidence angles. To enable flight in such flow conditions, it is important to develop physics-based flow control strategies capable of improving the overall aerodynamic performance of the wing and its flight stability. The main implications are reduced fuel (and energy) consumption during flight, increased aircraft range, improvements in safety and productivity of air travel, attenuation of the acoustic signature, as well as enabled capability of aircraft to fly in challenging external environments. Towards this goal, many studies have been performed to analyze and control flows over airfoils in spanwise periodic configurations. These may also be called infinite-span wings. These studies were fundamental to revealing important aspects of flow physics. However, in reality, the flows around wings are three-dimensional (3-D). In addition, modern aircraft wings are usually tapered and swept. The 3-D vortex dynamics of flows over wings has a significant influence on aircraft design, by reducing the overall lift, generating induced drag, and increasing flow unsteadiness. Thus, it is important to develop strategies to control the vortex dynamics that encompass the knowledge of the 3-D characteristics of the flow over finite, swept, and tapered wings. Especially for post-stall flow conditions, the wake dynamics around tapered swept wings is largely unexplored. It is still a challenge to understand how the wing geometry relates to the vortex formation for different aspect and taper ratios, as well as angles of attack and sweep. To design control strategies to improve aerodynamic performance for finite, swept, and tapered wings, we must go beyond the sole characterization of flow structures. In fact, the identification of perturbation dynamics is called for to modify the flow field. Three-dimensional flow control is challenging due to the high-dimensional and nonlinear nature of the flow dynamics of the wakes. Thus, it is necessary to find an appropriate actuation setup for the problem that can alter the base flow behavior. This effort can be guided by modal analysis methods. In our work, we have used resolvent analysis, a method based on the singular value decomposition (SVD) of the resolvent, which is a linear operator constructed using the Navier-Stokes equations linearized with respect to the base flow. For unsteady flows, the statistically converged time-averaged flow field is used as a base flow to construct the resolvent operator. The strength of the resolvent operator through this approach is the capability to find optimal forcing modes which amplify outputs in the flow field and give insights into the perturbed flow through the spatial response modes. The challenge within resolvent analysis is the SVD computation for large-scale resolvent operators that are generated for high-dimensional flow fields, such as three-dimensional and turbulent flows. By taking advantage of low-rank approximation of the resolvent operator, recent developments using randomized numerical linear algebra have accelerated the computation of the dominant resolvent modes. With reduced computational costs, these efforts have enabled the use of resolvent analysis in turbulent flows over spanwise periodic airfoils and expanded its applicability to triglobal problems and higher Reynolds number flows. With the randomized algorithm, we can use resolvent analysis to uncover the dynamics of 3-D flows over finite, swept, and tapered wings, supporting flow control efforts to improve their overall aerodynamic performance. The present study has shown how to develop a 3-D resolvent-based flow control over finite wings. We initiate by studying flows over finite wings and the effects of wing sweep and taper on the post-stall wake dynamics through direct numerical simulations (DNS). We consider laminar flows at chord-based Reynolds numbers of 400 and 600 with weak compressible effects at a freestream Mach number 0.1. The flows are studied around wings at angles of attack between 14 and 30 degrees with semi aspect ratios ranging from 1 to 4, sweep angles up to 50 degrees, and taper ratios from 0.27 to 1. Following a comprehensive characterization of the wake dynamics through DNS results, we extend our knowledge of the dynamics of flow perturbations by analyzing the triglobal resolvent modes. Through the identification of the optimal harmonic perturbations that can be amplified in the flow field, we develop 3-D active flow control that is shown to significantly modify the wake structures around the wings. This comprehensive investigation provides novel and unique insights that reveal the flow structures that can be amplified in the wake and modify their dynamics in post-stall flow conditions.
Book Synopsis Effect of Symmetrical Vortex Shedding on the Longitudinal Aerodynamic Characteristics of Wing-body-tail Combinations by : M. R. Mendenhall
Download or read book Effect of Symmetrical Vortex Shedding on the Longitudinal Aerodynamic Characteristics of Wing-body-tail Combinations written by M. R. Mendenhall and published by . This book was released on 1975 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Investigation of Aerodynamic Characteristics of Wings with Separation-induced Flows by : C. Subba Reddy
Download or read book Numerical Investigation of Aerodynamic Characteristics of Wings with Separation-induced Flows written by C. Subba Reddy and published by . This book was released on 1978 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Theory of Thin Wings in Subsonic Flow by : Sergeĭ Mikhaĭlovich Belot︠s︡erkovskiĭ
Download or read book The Theory of Thin Wings in Subsonic Flow written by Sergeĭ Mikhaĭlovich Belot︠s︡erkovskiĭ and published by . This book was released on 1967 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Theoretical Study of a Rectangular Wing in a Vortical Wake at Low Speed by : Willard G. Smith
Download or read book Experimental and Theoretical Study of a Rectangular Wing in a Vortical Wake at Low Speed written by Willard G. Smith and published by . This book was released on 1960 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements by :
Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Summary and Analysis of Horizontal-tail Contribution to Longitudinal Stability of Swept-wing Airplanes at Low Speeds by : Robert H. Neely
Download or read book Summary and Analysis of Horizontal-tail Contribution to Longitudinal Stability of Swept-wing Airplanes at Low Speeds written by Robert H. Neely and published by . This book was released on 1959 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Abstracts and Reclassification Notice by : United States. National Advisory Committee for Aeronautics
Download or read book Research Abstracts and Reclassification Notice written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1954 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: