Advances in Effective Flow Separation Control for Aircraft Drag Reduction - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Advances in Effective Flow Separation Control for Aircraft Drag Reduction write by Ning Qin. This book was released on 2019-10-17. Advances in Effective Flow Separation Control for Aircraft Drag Reduction available in PDF, EPUB and Kindle. This book presents the results of a European-Chinese collaborative research project, Manipulation of Reynolds Stress for Separation Control and Drag Reduction (MARS), including an analysis and discussion of the effects of a number of active flow control devices on the discrete dynamic components of the turbulent shear layers and Reynolds stress. From an application point of view, it provides a positive and necessary step to control individual structures that are larger in scale and lower in frequency compared to the richness of the temporal and spatial scales in turbulent separated flows.
Flow Control Techniques and Applications
Flow Control Techniques and Applications - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Flow Control Techniques and Applications write by Jinjun Wang. This book was released on 2019. Flow Control Techniques and Applications available in PDF, EPUB and Kindle. Master the theory, applications and control mechanisms of flow control techniques.
Aerodynamic Drag Reduction Technologies
Aerodynamic Drag Reduction Technologies - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Aerodynamic Drag Reduction Technologies write by Peter Thiede. This book was released on 2013-06-29. Aerodynamic Drag Reduction Technologies available in PDF, EPUB and Kindle. ------------------------------------------------------------ This volume contains the Proceedings of the CEAS/DragNet European Drag Reduction Conference held on 19-21 June 2000 in Potsdam, Germany. This conference, succeeding the European Fora on Laminar Flow Technology 1992 and 1996, was initiated by the European Drag Reduction Network (DragNet) and organised by DGLR under the auspice of CEAS. The conference addressed the recent advances in all areas of drag reduction research, development, validation and demonstration including laminar flow technology, adaptive wing concepts, turbulent and induced drag reduction, separation control and supersonic flow aspects. This volume which comprises more than 40 conference papers is of particular interest to engineers, scientists and students working in the aeronautics industry, research establishments or academia.
The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains
The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains write by Rose McCallen. This book was released on 2004-09. The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains available in PDF, EPUB and Kindle. This book includes the carefully edited contributions to the United Engineering Foundation Conference: The Aerodynamics of Heavy Vehicles: Trucks, Buses and Trains held in Monterey, California from December 2-6, 2002. This conference brought together 90 leading engineering researchers discussing the aerodynamic drag of heavy vehicles. The book topics include a comparison of computational fluid dynamics calculations using both steady and unsteady Reynolds-averaged Navier-Stokes, large-eddy simulation, and hybrid turbulence models and experimental data obtained from wind tunnel experiments. Advanced experimental techniques including three-dimensional particle image velocimetry are presented as well, along with their use in evaluating drag reduction devices.
Active and Passive Separation Control for Drag Reduction of a Maneuvering Hull Form
Active and Passive Separation Control for Drag Reduction of a Maneuvering Hull Form - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Active and Passive Separation Control for Drag Reduction of a Maneuvering Hull Form write by James Crandall Schulmeister. This book was released on 2017. Active and Passive Separation Control for Drag Reduction of a Maneuvering Hull Form available in PDF, EPUB and Kindle. Boundary layer separation is a source of large fluid dynamic forces on many engineered vehicles and structures, limiting the speed and efficiency at which we transport people and goods. The maneuvering of ocean and air vehicles in particular is limited by resistance due to cross-flow separation. Hull forms with lower hydrodynamic resistance in maneuvers are able to follow trajectories with tighter turns and at higher speeds. Despite the progress that has been made in the control of two dimensional flow separation, little has been done to apply flow control to complex three-dimensional separation from maneuvering hull forms. This thesis studies and develops mechanisms for mitigating three-dimensional cross-flow separation to reduce the drag of hull forms in maneuvers. A new strategy is proposed for designing flow control mechanisms for the three dimensional flow past maneuvering hull forms based on the unsteady cross-flow analogy. The unsteady cross-flow analogy relates the steady flow past a three-dimensional body to an analogous unsteady two-dimensional flow past a cylinder that changes size and shape in time. This provides a framework for adapting two-dimensional drag reduction techniques to the three-dimensional flow. In addition, the unsteady cross-flow analogy is computationally inexpensive and so is suitable for iterative use in preliminary design. The new strategy is considered by first implementing the unsteady cross-flow analogy in numerical simulations. Next, passive and active flow control mechanisms are studied experimentally for drag reduction of a circular cylinder and then adapted through the analogy for drag reduction of a slender body at an angle of attack. Passive control is exerted through modifications to the shape of the body and active control is exerted with rotating control cylinders. Both passive and active methods are experimentally demonstrated to reduce the drag. The experimental results also confirm key predictions of the unsteady cross-flow analogy, demonstrating that it is a promising tool for developing three-dimensional separation control techniques.
