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Performance Prediction Of Cavitating Propulsors Using A Viscous Inviscid Interaction Method
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Book Synopsis Performance Prediction of Cavitating Propulsors Using a Viscous/inviscid Interaction Method by : Hong Sun
Download or read book Performance Prediction of Cavitating Propulsors Using a Viscous/inviscid Interaction Method written by Hong Sun and published by . This book was released on 2008 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: A viscous/inviscid interaction method for predicting the effect of viscosity on the performance of wetted and cavitating propulsors is presented. The emphasis is placed on steady wetted and cavitating propulsor flows. A three-dimensional low order potential based boundary element method is strongly coupled with a two dimensional integral boundary layer analysis method based on the strip theory assumption. The influence of viscosity on the outer inviscid flow is modeled through the wall transpiration model by distributing "blowing" sources on the propulsor blade and trailing wake surfaces. The boundary layer edge velocities are expressed as the sum of the inviscid edge velocity and a correction which depends only on the boundary layer variables. The influence of outer potential flow on the inner boundary layer flow is considered through the edge velocities. In the case of sheet cavitation, a "thin" cavity approach is employed and the viscous/inviscid interaction method is applied on the blade surface underneath the cavity. On the cavity surface, the friction force coefficient is forced to be zero. Numerical predictions by the present viscous/inviscid interaction method are presented for open, ducted, and water-jet propulsors. For water-jet propulsors, the flow is solved in an iterative manner by solving the rotor and stator problems separately and by considering the time-averaged effects of one component on the other. Predicted forces, pressure distributions, and boundary layer variables are compared with those predicted by other numerical methods and experimental measurements.
Book Synopsis Application of the Three-dimensional Viscous/inviscid Interaction Method on Predicting the Performance of Propulsors with Blunt Trailing Edges by : Weikang Du
Download or read book Application of the Three-dimensional Viscous/inviscid Interaction Method on Predicting the Performance of Propulsors with Blunt Trailing Edges written by Weikang Du and published by . This book was released on 2019 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a robust and efficient flow separation model coupled with the viscous/inviscid interaction method (VII) is presented to predict the performance of propulsors with blunt trailing edges (TEs) in steady and fully wetted flow. The VII method is used to solve the flow around hydrofoils, three-dimensional wings and propellers with sharp TEs. The pressure distributions and open water characteristics are compared with either Reynolds-Averaged Navier-Stokes (RANS) simulations or with existing experimental data. It is shown that compared with the potential flow methods, the 3D VII method can improve the accuracy of the results significantly. A flow separation model is proposed so that the VII method can be applied to hydrofoils, ducts and propellers with blunt TEs. The criteria of zero lift and zero moment are adopted to determine the end of the extension, and flow separation criteria are used to determine the starting points on either side of the section. The pressure distributions and skin friction along the hydrofoils and ducts correlate well with those from the RANS method. The thrust and torque of the propeller agree much better with experimental measurements when the extension is determined from this model rather than choosing random locations. This model requires much less computational effort while preserving high accuracy, and thus can be used reliably in designing and analyzing hydrofoils, open and ducted propellers with blunt TEs. The objective of this study is to develop an accurate and computationally efficient tool to model the effects of the viscosity on the propulsor performance and pressure distributions for engineering purpose, and also to extend the capability of the VII method in predicting the flows around hydrofoil, duct and propeller sections with blunt TEs
Download or read book Marine Propulsors written by Sverre Steen and published by MDPI. This book was released on 2018-10-10 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Marine Propulsors" that was published in JMSE
Book Synopsis The Maritime Engineering Reference Book by : Anthony F. Molland
Download or read book The Maritime Engineering Reference Book written by Anthony F. Molland and published by Elsevier. This book was released on 2011-10-13 with total page 921 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Maritime Engineering Reference Book is a one-stop source for engineers involved in marine engineering and naval architecture. In this essential reference, Anthony F. Molland has brought together the work of a number of the world's leading writers in the field to create an inclusive volume for a wide audience of marine engineers, naval architects and those involved in marine operations, insurance and other related fields. Coverage ranges from the basics to more advanced topics in ship design, construction and operation. All the key areas are covered, including ship flotation and stability, ship structures, propulsion, seakeeping and maneuvering. The marine environment and maritime safety are explored as well as new technologies, such as computer aided ship design and remotely operated vehicles (ROVs).Facts, figures and data from world-leading experts makes this an invaluable ready-reference for those involved in the field of maritime engineering.Professor A.F. Molland, BSc, MSc, PhD, CEng, FRINA. is Emeritus Professor of Ship Design at the University of Southampton, UK. He has lectured ship design and operation for many years. He has carried out extensive research and published widely on ship design and various aspects of ship hydrodynamics. * A comprehensive overview from best-selling authors including Bryan Barrass, Rawson and Tupper, and David Eyres* Covers basic and advanced material on marine engineering and Naval Architecture topics* Have key facts, figures and data to hand in one complete reference book
Book Synopsis Minimum Pressure Envelope Cavitation Analysis Using Two-Dimensional Panel Method by : Christopher J. Peterson
Download or read book Minimum Pressure Envelope Cavitation Analysis Using Two-Dimensional Panel Method written by Christopher J. Peterson and published by . This book was released on 2008 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis tool for calculating minimum pressure envelopes was developed using XFOIL. This thesis presents MATLAB(registered) executables that interface with a modified version of XFOIL for determining the minimum pressure of a foil operating in an inviscid fluid. The code creates minimum pressure envelopes, similar to those published by Brockett (1965). XFOIL, developed by Mark Drela in 1986, is a design system for Low Reynolds Number Airfoils that combines the speed and accuracy of high-order panel methods with fully-coupled viscous/inviscid interaction. XFOIL was altered such that it reads in command line arguments that provide operating instructions, rather than operator interaction via menu options. In addition, all screen output and plotting functions were removed. These modifications removed XFOIL's user interface, and created a black box version of XFOIL that would perform the desired calculations and write the output to a file. These modifications allow rapid execution and interface by an external program, such as MATLAB. In addition, XFOIL's algorithms provide a significant improvement in the accuracy of minimum pressure prediction over the method published by Brockett. Development of the modified XFOIL and MATLAB interface contained in this thesis is intended for future interface with Open-source Propeller Design and Analysis Program (OpenProp). OpenProp is an open source MATLAB-based suite of propeller design tools. Currently, OpenProp performs parametric analysis and single propeller design, but does not perform cavitation analysis. Minimum pressure envelopes provide the propeller designer information about operating conditions encountered by propellers. The code developed in this thesis allows the designer to rapidly assess cavitation conditions while in the design phase, and make modifications to propeller blade design in order to optimize cavitation performance. A methodology for design is discussed outlining future integration with OpenProp.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1987 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Computational and Experimental Study of Viscous Flow Around Cavitating Propulsors by : Wesley Huntington Brewer
Download or read book A Computational and Experimental Study of Viscous Flow Around Cavitating Propulsors written by Wesley Huntington Brewer and published by . This book was released on 1995 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :University/Navy/Industry Consortium on Cavitation Performance of High Speed Propulsors. Meeting Publisher : ISBN 13 : Total Pages :260 pages Book Rating :4.:/5 (456 download)
Book Synopsis University/navy/industry Consortium on Cavitation Performance of High Speed Propulsors by : University/Navy/Industry Consortium on Cavitation Performance of High Speed Propulsors. Meeting
Download or read book University/navy/industry Consortium on Cavitation Performance of High Speed Propulsors written by University/Navy/Industry Consortium on Cavitation Performance of High Speed Propulsors. Meeting and published by . This book was released on 1995 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Maritime Technology and Engineering by : Carlos Guedes Soares
Download or read book Maritime Technology and Engineering written by Carlos Guedes Soares and published by CRC Press. This book was released on 2014-09-30 with total page 1450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maritime Technology and Engineering includes the papers presented at the 2nd International Conference on Maritime Technology and Engineering (MARTECH 2014, Lisbon, Portugal, 15-17 October 2014). The contributions reflect the internationalization of the maritime sector, and cover a wide range of topics: Ports; Maritime transportation; Inland navigat
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1979 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP. written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Twenty-Second Symposium on Naval Hydrodynamics by : National Research Council
Download or read book Twenty-Second Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 2000-03-02 with total page 1039 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Twenty-Second Symposium on Naval Hydrodynamics was held in Washington, D.C., from August 9-14, 1998. It coincided with the 100th anniversary of the David Taylor Model Basin. This international symposium was organized jointly by the Office of Naval Research (Mechanics and Energy Conversion S&T Division), the National Research Council (Naval Studies Board), and the Naval Surface Warfare Center, Carderock Division (David Taylor Model Basin). This biennial symposium promotes the technical exchange of naval research developments of common interest to all the countries of the world. The forum encourages both formal and informal discussion of the presented papers, and the occasion provides an opportunity for direct communication between international peers.
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 1991 with total page 1460 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.
Download or read book Aeronautical Engineering written by and published by . This book was released on 1992 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
Book Synopsis Twenty-First Symposium on Naval Hydrodynamics by : National Research Council
Download or read book Twenty-First Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 1997-09-11 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development Publisher : ISBN 13 : Total Pages :614 pages Book Rating :4.3/5 (243 download)
Book Synopsis AGARD Index of Publications by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development
Download or read book AGARD Index of Publications written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1995 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Crashworthiness by : Norman Jones
Download or read book Structural Crashworthiness written by Norman Jones and published by Butterworth-Heinemann. This book was released on 1983 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
