Download or read book Development of an Efficient 3 D CFD Software to Simulate and Visualize the Scavenging of a Two stroke Engine written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The two-stroke engine is widely used in many different devices. But the environmentally problematic exhaust characteristic is a big drawback of this type of engine. In the scavenging process, when the fresh charge displaces the exhaust gas in the cylinder, lies the biggest opportunity to improve the exhaust data by geometry optimization. Therefore, we developed a software package to efficiently simulate the three-dimensional, time-dependent, Navier-Stokes equations within the complex, real-world geometry of the two-stroke engine with moving piston and rotating crankshaft. Due to the high temperature in the cylinder after combustion, a temperature dependent treatment of the material constants is necessary. Adaptive local time-stepping and dynamic local mesh adaption, as well as parallelization of the code, are used to speed up the computation time considerably. The software has been extensively validated and has been applied to the problem of short-circuiting in two-stroke engines.
Download or read book Development of an Efficient 3 D CFD Software to Simulate and Visualize the Scavenging of a Two stroke Engine written by Dirk Trescher and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Innovative 3D CFD Approach towards Virtual Development of Internal Combustion Engines written by Marco Chiodi and published by Springer Science & Business Media. This book was released on 2011-03-07 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the engine development process, simulation and predictive programs have continuously gained in reliance. Due to the complexity of future internal combustion engines the application of simulation programs towards a reliable “virtual engine development” is a need that represents one of the greatest challenges. Marco Chiodi presents an innovative 3D-CFD-tool, exclusively dedicated and optimized for the simulation of internal combustion engines. Thanks to improved or newly developed 3D-CFD-models for the description of engine processes, this tool ensures an efficient and reliable calculation also by using coarse 3D-CFD-meshes. Based on this approach the CPU-time can be reduced up to a factor 100 in comparison to traditional 3D-CFD-simulations. In addition an integrated and automatic “evaluation tool” establishes a comprehensive analysis of the relevant engine parameters. Due to the capability of a reliable “virtual development” of full-engines, this fast response 3D-CFD-tool makes a major contribution to the engine development process. Südwestmetall-Förderpreis 2010
Download or read book Advances on Mechanics Design Engineering and Manufacturing written by Benoit Eynard and published by Springer. This book was released on 2016-09-02 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers papers presented at the International Joint Conference on Mechanics, Design Engineering and Advanced Manufacturing (JCM 2016), held on 14-16 September, 2016, in Catania, Italy. It reports on cutting-edge topics in product design and manufacturing, such as industrial methods for integrated product and process design; innovative design; and computer-aided design. Further topics covered include virtual simulation and reverse engineering; additive manufacturing; product manufacturing; engineering methods in medicine and education; representation techniques; and nautical, aeronautics and aerospace design and modeling. The book is divided into eight main sections, reflecting the focus and primary themes of the conference. The contributions presented here will not only provide researchers, engineers and experts in a range of industrial engineering subfields with extensive information to support their daily work; they are also intended to stimulate new research directions, advanced applications of the methods discussed, and future interdisciplinary collaborations.
Download or read book Two Stroke Cycle Engine written by JohnB. Heywood and published by Routledge. This book was released on 2017-11-01 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the two-stroke cycle internal combustion engine, used in compact, lightweight form in everything from motorcycles to chainsaws to outboard motors, and in large sizes for marine propulsion and power generation. It first provides an overview of the principles, characteristics, applications, and history of the two-stroke cycle engine, followed by descriptions and evaluations of various types of models that have been developed to predict aspects of two-stroke engine operation.
Download or read book Numerical Simulation of Turbulent Flow Inside the Cylinder of a New Two stroke Grail Engine Design written by Shoeb Ahmed Syed and published by . This book was released on 2015 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents a novel way of implementing Autodesk computational fluid dynamics (CFD) software for internal combustion (IC) engine application. The main objective of this research is to develop a high fidelity simulation methodology for a state of art hybrid two-stroke Grail engine and to investigate the complex motion of piston and intake valve of the engine. Grail engine design is unique due to presence of single intake valve within the piston itself. Thus, the intake valve moves with the piston which makes the motion much more complex to study in the present work. Since the efficiency of combustion and the production of pollutants in the internal combustion engine are strongly dependent on the turbulent flow field in the engine cylinder. The focus is put in the analysis of the in-cylinder flow field dynamics and turbulence within the cylinder and through the complete engine cycle in the initial stages of development of the Grail engine. Finally, the scavenging process of the Grail engine with mixing and scavenging efficiency was also numerically investigated. In most engines, turbulent kinetic energy (TKE) is almost exclusively generated during the intake stroke and enhances greatly the mixing of air and fuel to give better mixing during compression stoke. The 3-D simulation of the flow through the engine is performed by using finite element method. Autodesk Reynold's-averaged Navier-Stokes (RANS) K ?? model is used to perform the calculations of the flow. The performance and possibilities that Autodesk CFD gives for this kind of application is evaluated.
Download or read book Computational Fluid Dynamics CFD Simulation of a Gas Solid Fluidized Bed Residence Time Validation Study written by Baru Debtera and published by GRIN Verlag. This book was released on 2021-11-29 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Academic Paper from the year 2021 in the subject Physics - Mechanics, , language: English, abstract: In this study, numerical simulations of a gas-solid fluidized bed reactor involving a two-fluid Eulerian multiphase model and incorporating the Kinetic Theory of Granular Flow (KTGF) for the solids phase have been performed using a commercial Computational Fluid Dynamics (CFD) software. The fluidized bed setup consists of 1,5 m height and 0,2 m diameter in which a series of experiments were performed using Helium tracer to determine the Residence Time Distribution (RTD) at various normalized velocities i.e., with different degrees of gas-solids mixing. Both 2D and 3D simulations of the fluidized bed reactor are performed. The main purpose of this study is to understand the hydrodynamic behavior of a gas-solid fluidized bed reactor through a framework of Eulerian multiphase model and to analyze hydrodynamic behavior of the gas-solids mixing.
Download or read book CFD Analysis Of Stratified Scavenging In Two Stroke IC Engines written by Srinivasa Rao and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The civilization of any country depends on the number of vehicles used by the public. For heavy duties, diesel engines are preferred, while for individual transport, a light duty, two-stroke petrol engines are being employed. Two stroke engines have been around us for more than a century and have survived successfully because of their low power to weight ratio fewer parts and inexpensive, However, from the beginning, two stroke engines have suffered from high emissions and poor fuel economy compared to the larger, heavier but more efficient four stroke engines. The major pollutants emitted from these two-stroke engines are carbon monoxide and un-burnt hydro carbons. Hence globally, stringent regulations are made for permissible levels of pollutants in the exhaust of two and four stroke spark ignition engines. Hydrocarbon emissions in two stroke engines are mainly due to short-circuiting of the fresh charge during scavenging process is a major source of pollution from the two-stroke spark ignition engines. In two-stroke internal combustion (IC) engines, each outward stroke of the piston is a power stroke.combustion turbulence are modeled and studied using CFD.
Download or read book Design and Simulation of Two Stroke Engines written by Gordon Blair and published by SAE International. This book was released on 1996-02-01 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design and Simulation of Two-Stroke Engines is a unique hands-on information source. The author, having designed and developed many two-stroke engines, offers practical and empirical assistance to the engine designer on many topics ranging from porting layout, to combustion chamber profile, to tuned exhaust pipes. The information presented extends from the most fundamental theory to pragmatic design, development, and experimental testing issues. Chapters cover: Introduction to the Two-Stroke Engine Combustion in Two-Stroke Engines Computer Modeling of Engines Reduction of Fuel Consumption and Exhaust Emissions Reduction of Noise Emission from Two-Stroke Engines and more
Download or read book A Software Model for Visualization of Large Unsteady 3D CFD Results written by Al Globus and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Literature Abstracts written by Society of Automotive Engineers and published by . This book was released on 2000 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Index abstracts of SAE Technical Papers written by and published by . This book was released on 2006 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 3 D CFD Simulation and Analysis of Engine Test Cell with Big Bypass ratio Turbofan Engine Rolls Royce Trent 500 written by D. Fouflias and published by . This book was released on 2003 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of a 3 D CFD DSMC Solution Methodology With a Wind Tunnel Experiment written by Christopher Earl Glass and published by . This book was released on 2002 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A 3 d Unstructured CFD Method for Maneuvering Vehicles written by Montgomery Hughson and published by . This book was released on 1999-01-01 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical simulation of maneuvering vehicles is accomplished using a three dimensional (3-D) unstructured computational fluid dynamic (CFD) method. The equations of fluid motion used are either the inviscid Euler equations or the full viscous Navier Stokes equations cast in an Arbitrary Lagrangian- Eulerian (ALE) framework. A turbulence model developed by Spalart and Allmaras is used for viscous solutions. The system of fluid equations are solved implicitly using upwind, flux-splitting techniques for the convective fluxes of either Roe or Van Leer with up to second-order temporal and spatial accuracy for steady or unsteady computations. Innovative boundary conditions for a moving mesh to include inviscid, viscous, far-field and a solid rocket motor exhaust exit surface were developed. The temporal solution is found using an application of Newton's method. The computational field simulation (CFS) of two 3-D wings and a waisted-body of revolution are compared to experimental data for boundary condition validation. An unsteady CFS of a pitching wing is validated by comparison to experimental data. A number of unsteady missile maneuver trajectories coupled with a six degree of freedom model using Euler angles and the Flat-Earth model are presented.
Download or read book Towards Industrial LES of Engine Combustion written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rocket based Combined Cycle Engine Technology Development written by James R. DeBonis and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
