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Aerodynamic Flow Simulation Through The Vortex Cloud Method
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Book Synopsis Aerodynamic Flow Simulation Through the Vortex Cloud Method by : Agustí-Junan Porta Ko
Download or read book Aerodynamic Flow Simulation Through the Vortex Cloud Method written by Agustí-Junan Porta Ko and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The present Bachelor thesis studies, develops and validates the Vortex Cloud Method in a 2-dimensional domain. This method is able to model the flow over a body accounting with flow separation and therefore, overcomes the main limitation of the classical potential models, where flow detachment is not allowed. The Vortex Cloud Method is a meshless model that computes the solution by solving the Navier Stokes Equations through several steps. First, the surface of the evaluated body is discretized in panels and the vorticity of each panel is obtained through potential methods. The next step consists on concentrating the vorticity in discrete vortices and shed them at a certain distance of the surface. After that, the free discrete vortices are convected under the influence of other vortices, the surface vorticity and the free stream. Moreover, viscous diffusion is simulated by a applying a random displacement to the vortices. Finally, the pressure coefficient distribution along the body surface is computed as well as the resulting force coefficients that determine the aerodynamic behaviour of a given body. The theoretical bases of the method and the implementation of each step are extensively explained in this work. Moreover, the implemented model is validated and discussed through the comparison of the results with experimental data.
Book Synopsis Aerodynamic Flow Simulation Using the Vortex Cloud Method to Predict the Performance of Lifting Bodies by : Julian D. T. Rimmer
Download or read book Aerodynamic Flow Simulation Using the Vortex Cloud Method to Predict the Performance of Lifting Bodies written by Julian D. T. Rimmer and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vortex Methods: Selected Papers Of The First International Conference On Vortex Methods by : Kyoji Kamemoto
Download or read book Vortex Methods: Selected Papers Of The First International Conference On Vortex Methods written by Kyoji Kamemoto and published by World Scientific. This book was released on 2000-05-11 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex methods have been developed and applied to many kinds of flows related to various problems in wide engineering and scientific fields. The purpose of the First International conference on Vortex methods was to provide an opportunity for engineers and scientists to present their achievements, exchange ideas and discuss new developments in mathematical and physical modeling techniques and engineering applications of vortex methods.
Book Synopsis Simulation of Vortex Dominated Aerodynamic Flows by a Point-vortex Method by : Zhenxue Jia
Download or read book Simulation of Vortex Dominated Aerodynamic Flows by a Point-vortex Method written by Zhenxue Jia and published by . This book was released on 1988 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vortex Element Methods for Fluid Dynamic Analysis of Engineering Systems by : R. I. Lewis
Download or read book Vortex Element Methods for Fluid Dynamic Analysis of Engineering Systems written by R. I. Lewis and published by Cambridge University Press. This book was released on 2005-07-21 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Panel methods employing surface distributions of source and vortex singularities based on the solution of boundary integral equations have been extensively used for modeling external and internal aerodynamic flows. Part 1 describes the surface vorticity method and illustrates applications of this technique over a wide range of engineering problems in aerodynamics and turbomachines, including lifting aerofoils and cascades, mixed-flow and rotating cascades for fans, pumps or turbines, meridional flows in turbomachines, flow past axisymmetric bodies, ducts and ducted propellers or fans. Part 2 extends surface vorticity modeling to the fairly new CFM field of vortex dynamics or vortex cloud theory. Methods are developed, again from first principles, to deal with shear layers, boundary layers, periodic wakes, bluff-body flows, cascades and aerofoils including the use of stall control spoilers. A number of useful computer programs are included.
Book Synopsis Vortex Element Methods for Fluid Dynamic Analysis of Engineering Systems by : R. I. Lewis
Download or read book Vortex Element Methods for Fluid Dynamic Analysis of Engineering Systems written by R. I. Lewis and published by Cambridge University Press. This book was released on 2005-07-21 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Panel methods employing surface distributions of source and vortex singularities based on the solution of boundary integral equations have been extensively used for modeling external and internal aerodynamic flows. Part 1 describes the surface vorticity method and illustrates applications of this technique over a wide range of engineering problems in aerodynamics and turbomachines, including lifting aerofoils and cascades, mixed-flow and rotating cascades for fans, pumps or turbines, meridional flows in turbomachines, flow past axisymmetric bodies, ducts and ducted propellers or fans. Part 2 extends surface vorticity modeling to the fairly new CFM field of vortex dynamics or vortex cloud theory. Methods are developed, again from first principles, to deal with shear layers, boundary layers, periodic wakes, bluff-body flows, cascades and aerofoils including the use of stall control spoilers. A number of useful computer programs are included.
Book Synopsis Aerodynamic Flow Simulation Using a Pressure-based Method and a Two-equation Turbulence Model by : Y. G. Lai
Download or read book Aerodynamic Flow Simulation Using a Pressure-based Method and a Two-equation Turbulence Model written by Y. G. Lai and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Full-Potential Modeling of Blade-Vortex Interactions by : Henry E. Jones
Download or read book Full-Potential Modeling of Blade-Vortex Interactions written by Henry E. Jones and published by . This book was released on 1997 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the full-potential modeling of a blade-vortex interaction was made. A primary goal of this study was to investigate the effectiveness of the various methods of modeling the vortex. The model problem restricts the interaction to that of an infinite wing with an infinite line vortex moving parallel to its leading edge. This problem provides a convenient testing ground for the various methods of modeling the vortex while retaining the essential physics of the full three-dimensional interaction. A full-potential algorithm specifically tailored to solve the blade-vortex interaction (BVI) was developed to solve this problem. The basic algorithm was modified to include the effect of a vortex passing near the airfoil. Four different methods of modeling the vortex were used: (1) the angle-of-attack methods, (2) the lifting-surface method, (3) the branch-cut method, and (4) the split-potential method. A side-by-side comparison of the four models was conducted. these comparisons included comparing generated velocity fields, a subcritical interaction, and a critical interaction. The subcritical and critical interactions are compared with experimentally generate results. The split-potential model was used to make a survey of some of the more critical parameters which affect the BVI.
Book Synopsis A Simulation Procedure for Vortex Flow Over an Oscillating Wing by : Knut Streitlien
Download or read book A Simulation Procedure for Vortex Flow Over an Oscillating Wing written by Knut Streitlien and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling and Numerical Simulation of Vortex Flow in Aerodynamics by : Hendrik Willem Marie Hoeijmakers
Download or read book Modeling and Numerical Simulation of Vortex Flow in Aerodynamics written by Hendrik Willem Marie Hoeijmakers and published by . This book was released on 1990 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vortex-based Aero- and Hydrodynamic Estimation by : Maziar Sam Hemati
Download or read book Vortex-based Aero- and Hydrodynamic Estimation written by Maziar Sam Hemati and published by . This book was released on 2013 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow control strategies often require knowledge of unmeasurable quantities, thus presenting a need to reconstruct flow states from measurable ones. In this thesis, the modeling, simulation, and estimator design aspects of flow reconstruction are considered. First, a vortex-based aero- and hydrodynamic estimation paradigm is developed to design a wake sensing algorithm for aircraft formation flight missions. The method assimilates wing distributed pressure measurements with a vortex-based wake model to better predict the state of the flow. The study compares Kalman-type algorithms with particle filtering algorithms, demonstrating that the vortex nonlinearities require particle filters to yield adequate performance. Furthermore, the observability structure of the wake is shown to have a negative impact on filter performance regardless of the algorithm applied. It is demonstrated that relative motions can alleviate the filter divergence issues associated with this observability structure. In addition to estimator development, the dissertation addresses the need for an efficient unsteady multi-body aerodynamics testbed for estimator and controller validation studies. A pure vortex particle implementation of a vortex panel-particle method is developed to satisfy this need. The numerical method is demonstrated on the impulsive startup of a flat plate as well as the impulsive startup of a multi-wing formation. It is clear, from these validation studies, that the method is able to accommodate the unsteady wake effects that arise in formation flight missions. Lastly, successful vortex-based estimation is highly dependent on the reliability of the low-order vortex model used in representing the flow of interest. The present treatise establishes a systematic framework for vortex model improvement, grounded in optimal control theory and the calculus of variations. By minimizing model predicted errors with respect to empirical data, the shortcomings of the baseline vortex model can be revealed and reconciled. Here, the method is demonstrated on an impulse matching model for canonical unsteady wing maneuvers and reveals the shortcomings of the Kutta condition in such flows. The resulting analysis sheds light on the governing physical processes and provides guidance for model improvement for the unsteady aerodynamics associated with these canonical wing maneuvers.
Book Synopsis Vortex Methods by : Georges-Henri Cottet
Download or read book Vortex Methods written by Georges-Henri Cottet and published by Cambridge University Press. This book was released on 2008-04-24 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex methods have matured in recent years, offering an interesting alternative to finite difference and spectral methods for high resolution numerical solutions of the Navier Stokes equations. In the past three decades, research into the numerical analysis aspects of vortex methods has provided a solid mathematical background for understanding the accuracy and stability of the method. At the same time vortex methods retain their appealing physical character, which was the motivation for their introduction. This book presents and analyzes vortex methods as a tool for the direct numerical simulation of impressible viscous flows. It will interest graduate students and researchers in numerical analysis and fluid mechanics and also serve as an ideal textbook for courses in fluid dynamics.
Book Synopsis Numerical and Physical Aspects of Aerodynamic Flows IV by : Tuncer Cebeci
Download or read book Numerical and Physical Aspects of Aerodynamic Flows IV written by Tuncer Cebeci and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a selection of the papers presented at the Fourth Symposium on Numerical and Physical Aspects of Aerodynamic Flows, which was held at the California State University, Long Beach, from 16-19 January 1989. It includes the Stewartson Memorial Lecture of Professor J. H. Whitelaw, and is divided into three parts. The first is a collection of papers that describe the status of current technology in two- and three-dimensional steady flows, the second deals with two- and three-dimensional unsteady flows, and the papers in the third address stability and transition. Each of the three parts begins with an overview of current research, as described in the following chapters. The individual papers are edited versions of the selected papers originally submitted to the symposium. Four years have passed since the Third Symposium, and certain trends be come clear if one compares the papers contained in this volume with those of previous volumes. There are more three- than two-dimensional problems consid ered in Part 1 and the latter address more difficult problems than in the past, for example, the extension to higher angles of attack, to transonic flow, to leading edge ice accretion, and to thick hydrofoils. The large number of papers in the first part reflects the emphasis of current research and development and the needs of industry.
Book Synopsis Computer Simulation of Flow Over an Airfoil Using the Vortex Panel Method by : Opale M. Hullen (University of Manitoba student)
Download or read book Computer Simulation of Flow Over an Airfoil Using the Vortex Panel Method written by Opale M. Hullen (University of Manitoba student) and published by . This book was released on 1998 with total page 142 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 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cumulative Index to NASA Tech Briefs by : United States. National Aeronautics and Space Administration
Download or read book Cumulative Index to NASA Tech Briefs written by United States. National Aeronautics and Space Administration and published by . This book was released on 1970 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Conical Euler Analysis and Active Roll Suppression for Unsteady Vortical Flows about Rolling Delta Wings by : Elizabeth M. Lee-Rausch
Download or read book Conical Euler Analysis and Active Roll Suppression for Unsteady Vortical Flows about Rolling Delta Wings written by Elizabeth M. Lee-Rausch and published by . This book was released on 1993 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
