Download or read book Compressible Flow Modeling in a Low Pressure Natural Gas Fuel Injector written by Eugene D. White and published by . This book was released on 2000 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simulation of Gaseous Fuel Injector Nozzle Angle Effect on Compressed Natural Gas CNG Engine written by Mohamad Khidhir Masteki and published by . This book was released on 2009 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of an indirect injection (ID-I) compressed natural gas engine (CNG) is highly dependent on the quality of the air fuel mixture preparation. This is particular important when operating at a stratified charge condition, where ideal mixture distribution would form a homogenous region. And this has connection with the flow of injection. The study of flow pattern for injector nozzle is very important before the process is entering the real engine. Numerical simulation was carried out to investigate the effect of fluid motion of different angle nozzle in the injector. Other than investigate the fuel pattern, this project also recommend that the single nozzle hole of injector are not suitable for get a better mixing. Computational Fluid Dynamics application software (FLUENT), was used to simulate the fluid flow motion generated by different nozzle angle of injection. The analysis only was done in non-combustion bomb which is easy to identify the better flow which comes out from injector with a different angle. This project are simulated in two dimension modeling because the result can be obtain from two dimensional modeling, not in three dimension. The entire information and analysis in this thesis are hope could provide references for the future potential researchers.

Download or read book Design and Development of High Pressure Natural Gas Injector Model for Single Cylinder Four Stroke Engine Using Matlab Simulink written by Mohd Nor Afiq Nor Hashim and published by . This book was released on 2012 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this project is to design and develop the hydraulic model for control oriented injector model for single cylinder four-stroke engine using Matlab Simulink. Injector plays significant role in determining engine performance by controlling the fuel supplied consequently the air to fuel ratio. In order to achieve acceptable accuracy for abroad range of engine speed the control of injection process must be carefully studied. The model consist of hydraulic, electromagnetic and mechanical model. This thesis is carried out with purpose to produces a reliable hydraulic model that can be used to study the control process. Reasonable mass flow rate data need to be determine by the model based on predetermined boundary condition. The fuel injector based on HDEV 5 were design using Matlab Simulink. The are two different Matlab Simulink design the fuel flow rate coresponding to the radius/diameter ratio and the fuel flow rate corresponding to the needle-seat relative displacement. Based on the graph and explanation, comparison between fuel flow rate and r/d ratio and fuel flow rate and needle-seat relative displacement are made. The result show that there is cavitation occur at r/d = 0.02 and effect the flow rate of the fuel injected. While in the injector opening phase, the fuel flow rate is slightly increase before the injector reached the transition value. The model of flow through the control volume feeding and discharge holes was further detailed as it was shown to play an important role in determining the flow regime in the orifice.

Download or read book Compressed Gas Handbook written by Samuel D. Wilson and published by . This book was released on 1969 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: High pressure compressible flow systems in space vehicle ground support equipment.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Flow of Compressed Natural Gas Through a Fuel Injector written by Erin E. Eldridge and published by . This book was released on 2016 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1969-03 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1981 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling Low Flow Pressure Drop Flow Rate Instabilities in a Compressible Air water System written by Peter Jonathan Francis and published by . This book was released on 1980 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Technologies in Flow Dynamics and Combustion in Propulsion and Power written by Lei Luo and published by Frontiers Media SA. This book was released on 2022-08-05 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Hybrid RANS LES Modelling written by Shia-Hui Peng and published by Springer Science & Business Media. This book was released on 2008-01-24 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulence modelling has long been, and will remain, one of the most important t- ics in turbulence research, challenging scientists and engineers in the academic world and in the industrial society. Over the past decade, Detached Eddy Simulation (DES) and other hybrid RANS-LES methods have received increasing attention from the turbulence-research community, as well as from industrial CFD engineers. Indeed, as an engineering modelling approach, hybrid RANS-LES methods have acquired a remarkable profile in modelling turbulent flows of industrial interest in relation to, for example, transportation, energy production and the environment. The advantage exploited with hybrid RANS-LES modelling approaches, being - tentially more computationally efficient than LES and more accurate than (unsteady) RANS, has motivated numerous research and development activities. These activities, together with industrial applications, have been further facilitated over the recent years by the rapid development of modern computing resources. As a European initiative, the EU project DESider (Detached Eddy Simulation for Industrial Aerodynamics, 2004-2007), has been one of the earliest and most systematic international R&D effort with its focus on development, improvement and applications of a variety of existing and new hybrid RANS-LES modelling approaches, as well as on related numerical issues. In association with the DESider project, two subsequent international symposia on hybrid RANS-LES methods have been arranged in Stockholm (Sweden, 2005) and in Corfu (Greece, 2007), respectively. The present book is a result of the Second Symposium on Hybrid RANS-LES Methods, held in Corfu, Greece, 17-18 June 2007.

Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2006 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Compressed Gas Handbook written by Richard A. Cota and published by . This book was released on 1969 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental High Speed Compressible Subsonic Flow Pressure Losses Across Gate Butterfly and Ball Valves and Their Use in Natural Gas Transmission Flow Control Simulation Software written by Kirk J. Gomes and published by . This book was released on 2011 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first part of the three parts that this work is divided into describes the simulation of a two-spool, two-stream turbofan engine modeled independently using Modelica (Dymola), MATLAB/Simulink and the Numerical Propulsion System Simulation (NPSS). The model contains steady-state performance maps for all of the components and has control volumes where continuity and energy balances are maintained. Rotor dynamics and duct momentum dynamics are also included. Steady state design and off-design points as well as transients can be simulated. The results of the simulation using the three modern tools are compared with the published results obtained using DIGTEM (Digital Computer Program for Generating Dynamic Turbofan Engine Models) and the pros and cons of each modern program are examined. The second part describes the experimental results obtained by measuring pressure losses across gate, butterfly and ball valves subjected to compressible flow. Experimental data has been collected for all possible combinations of gate, butterfly and ball valves with nominal diameters of 0.5", 0.75", 1", and 1.25" and various valve flow areas, i.e. fully open, three quarter open, half open, and quarter open. The results have been compared to a similar study conducted using a ball valve with a nominal diameter of 1.5". The third and final part uses the results of the above two parts and describes the development and simulation of a natural gas transmission model. A gas turbine engine drives a compressor that is used to pump natural gas through a pipeline. Upstream of the compressor is a throttling valve used to control the mass flow rate. Downstream, the Weymouth equation is used to model the volumetric flow rate and pressure losses in the pipeline.

Download or read book Design Application Performance and Emissions of Modern Internal Combustion Engine Systems and Components written by American Society of Mechanical Engineers. Internal Combustion Engine Division. Technical Conference and published by . This book was released on 2002 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling Injection and Ignition in Direct Injection Natural Gas Engines written by Xu (Stewart). Cheng and published by . This book was released on 2008 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing concerns about the harmful effects of conventional liquid fossil fuel emissions, natural gas has become a very attractive alternative fuel to power prime movers and stationary energy conversion devices. This research studies the injection and ignition numerically for natural gas (mainly methane) as a fuel applied to diesel engine.Natural gas injector and glow plug ignition enhancement are two of the most technical difficulties for direct injection natural gas engine design. This thesis models the natural gas injector, and studies the characteristics of the internal flow in the injector and natural gas jet in the combustion chamber during the injection process. The poppet valve model and pintle valve model are the first reported models to simulate the natural gas injector to improve the traditional velocity and pressure boundary conditions.This thesis also successfully models the glow plug assisted natural gas ignition and combustion processes by developing a glow plug discretized model and a novel virtual gas sub-layer model. Glow plug discretized model can describe the transient heat transfer, and adequately represents the thin layers of heat penetration and the local temperature difference due to the cold gas jet impingement. The virtual gas sub-layer model considers complicated physical processes, such as chemical reaction, heat conduction, and mass diffusion within the virtual sub-layers without significantly increasing computational time and load.KIVA-3V CFD code was chosen to simulate the fluid flow. Since the KIVA-3V is designed specifically for engine research application with conventional liquid fuels, many modifications have been implemented to facilitate this research.