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 Simulation of Gaseous Fuel Injector Geometries of Mult Holes Nozzle by Using CNG Engine written by Muhamad Akhbar Osman Md. Hashim and published by . This book was released on 2009 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compressed natural gas (CNG) is the most preferred for fossil fuel substitution. This project is to study simulation of gaseous fuel injector geometries of multi-hole nozzle by using CNG engine. Three main components are focused on this paper. First, the relation between engine speed and injector pressure in achieving stoichiometric air-fuel mixture is investigated. Second, relation between valve lift and injector pressure in obtaining stoichiometric air-fuel mixture is investigated. Lastly the quality of air-fuel mixture in engine cylinder is investigated. Stoichiometric air-fuel mixture leads to good drivability, high combustion efficiency, and avoid internal damage on engine parts. In order to achieve stoichiometric air-fuel mixture, the different engine speeds and valve lift are considered and investigated. Therefore, Computational Fluid Dynamics (CFD) method using COSMOS FloWork simulation software is used for this purpose. The simulation of gaseous fuel injector geometries of multi-hole nozzle by using CNG engine is conducted in 1.78mm, 3.55mm, 5.33mm and 7.1mm intake valve lift, and also engine speeds at 2000 RPM, 3000 RPM, 4000 RPM and 5000 RPM. The results are shown; by increasing the engine speed, the injector pressure increases at different valve lift. Valve lift increment will increase the injector pressure for different engine speeds but the injector pressure is constant for valve lift increment from 75 percent to 100 percent. In the best trend air-fuel mixing result, the injected gas fuel and intake air has been mixed spread evenly in combustion chamber.
Download or read book Development of New Injector for Compressed Natural Gas Engine and the Effect on Performance written by Semin and published by . This book was released on 2011 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis deals with the experimental and computational assessment of a new injector nozzle for a sequential port injection CNG engine. The objective of this thesis was to develop, analyse and investigate the performance characteristics of a new injector nozzle. The methodology of this study was to convert a diesel engine to a CNG engine with modifications the piston and enhancements the spark ignition and throttle based on computational design using GT-Power and experimental results using an eddy current dynamometer. Next, a simulation of the fuel flow of the new injector nozzle was made using Cosmos FloWok. The final objective was to investigate the performance characteristics of the CNG engine using the new injector nozzle. The investigation focused on engine performance based on variations in engine speed. The engine experiments were conducted according to ISO 3046 for reciprocating internal combustion engine performance. The results showed that the conversion of the diesel engine to a CNG engine reduced engine performance. The simulation of the fuel flow of the new injector nozzle increased the spray distribution, fuel-air mixing and fuel flow velocity. The performance characteristics of the new injector nozzle increased the CNG engine's performance and reduced its fuel consumption compared to the original injector. In conclusion, this study reports that the improvement of a new injector nozzle for a CNG engine significantly increased the engine's performance and fuel consumption.
Download or read book Study of Sequential Multipoint Injection Nozzle Effect of Compressed Natural Gas Engine written by Mohd adib Alias and published by . This book was released on 2008 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research and development of injection system has always been influenced by the availability and the form of fuel. In this project is about the study of the injection nozzle effect of compressed natural gas engine. This project study and simulate twenty types of sequential injection nozzle with different geometries using SolidWork and Cosmos FloWork software to find the best air and fuel mixing in the combustion chamber of the engine. The other effect of the modified injection nozzle is the velocities of the fuel in combustion chamber that can be determine using the software. The length of bore and stroke of the engine is base on the actual diesel engine and been model using SolidWork. As the result, the best injection nozzle is 10 degree nozzle. The air and fuel mixing is very good and better compare with the original injection nozzle. The velocity of fuel in combustion chamber is the highest compare with other design.
Download or read book Automotive Spark Ignited Direct Injection Gasoline Engines written by F. Zhao and published by Elsevier. This book was released on 2000-02-08 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The process of fuel injection, spray atomization and vaporization, charge cooling, mixture preparation and the control of in-cylinder air motion are all being actively researched and this work is reviewed in detail and analyzed. The new technologies such as high-pressure, common-rail, gasoline injection systems and swirl-atomizing gasoline fuel injections are discussed in detail, as these technologies, along with computer control capabilities, have enabled the current new examination of an old objective; the direct-injection, stratified-charge (DISC), gasoline engine. The prior work on DISC engines that is relevant to current GDI engine development is also reviewed and discussed. The fuel economy and emission data for actual engine configurations have been obtained and assembled for all of the available GDI literature, and are reviewed and discussed in detail. The types of GDI engines are arranged in four classifications of decreasing complexity, and the advantages and disadvantages of each class are noted and explained. Emphasis is placed upon consensus trends and conclusions that are evident when taken as a whole; thus the GDI researcher is informed regarding the degree to which engine volumetric efficiency and compression ratio can be increased under optimized conditions, and as to the extent to which unburned hydrocarbon (UBHC), NOx and particulate emissions can be minimized for specific combustion strategies. The critical area of GDI fuel injector deposits and the associated effect on spray geometry and engine performance degradation are reviewed, and important system guidelines for minimizing deposition rates and deposit effects are presented. The capabilities and limitations of emission control techniques and after treatment hardware are reviewed in depth, and a compilation and discussion of areas of consensus on attaining European, Japanese and North American emission standards presented. All known research, prototype and production GDI engines worldwide are reviewed as to performance, emissions and fuel economy advantages, and for areas requiring further development. The engine schematics, control diagrams and specifications are compiled, and the emission control strategies are illustrated and discussed. The influence of lean-NOx catalysts on the development of late-injection, stratified-charge GDI engines is reviewed, and the relative merits of lean-burn, homogeneous, direct-injection engines as an option requiring less control complexity are analyzed.
Download or read book Turbulence Modeling of Gaseous Injection and Mixing in DI Engines written by George Christos Papageorgakis and published by . This book was released on 1997 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Compresses Natural Gas CNG Engine Using Intake Valve Swirl written by Mohd Shahrul Azmi Mohd Akhir and published by . This book was released on 2008 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The compressed natural gas (CNG) is the alternative fuel was used in this project for the modified diesel engine convert to CNG engine. The improvement was giving more advantage in emission but it was lowering the performance of the engine. This project is concentrates to improve the air-fuel mixing in the combustion chamber. The modification is focused on the intake valve part to the new design with added fin. This is to produce the swirl to the flow of the fuel mixture which entering into the combustion chamber and produce the turbulent that will increase the combustion ability. The mix between the fuel and clean air completely could increase efficiency from the burning for the reduce of emissions. The perfect mix was influenced by the swirl air flow into intake flow. The addition of fins on intake valve is expected to be able to increase velocity and the value of the massflow, hence produced more swirl air flow enter into combution chamber. The configuration of the dimension from fins also could become the stage factor from swirl.Because of that the analysis of the form is expected to be able to become a solution to get the form of fins that could give more swirl air flow.This Final Project is discussed concerning the analysis of the problem above through pemodelan use the simulation of the computer by software SolidWork. The use of this SolidWork simulation is very exact because of planning still in the stage conceptual design, so as if being carried out modelling physical, will need the big cost and relative time for quite a long time.
Download or read book Advances in Compression Ignition Natural Gas Diesel Dual Fuel Engines written by Hongsheng Guo and published by Frontiers Media SA. This book was released on 2021-03-23 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Injection and Ignition Characteristics of Gaseous Fuel Jets for Low emission Engines written by Hengameh Delbari and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Application of renewable natural gas (RNG) and hydrogen (H2) in internal combustion engines with a direct injection (DI) configuration leads to improved thermal efficiency and reduced CO2. Because of the high nozzle pressure ratios (NPR) relevant to DI, typically an under-expanded jet is formed past the nozzle exit. Transient jet development affects ignition and combustion properties, and consequently performance and emissions of the engines significantly. In this research, the effects of parameters including injection pressure, gas type and composition, and back pressure on the characteristics of the gaseous jets have been experimentally investigated. The ignition properties of these jets have been studied using a hot surface. Results indicate that the NPR has the most significant effect on the jets' penetration rate. Additionally, adding H2 to natural gas contributes considerably to improve ignition properties of the gaseous mixture. The results are of value to support future modeling and engine development.
Download or read book Multi dimensional Modeling of Natural Gas Ignition Combustion and Pollutant Formation in Direct Injection Engines written by Apoorva Agarwal and published by . This book was released on 1998 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance and Simulation Study of a New Direct Injection DI Compressed Natural Gas CNG Engine written by Md. Abdul Kalam and published by . This book was released on 2007 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Visualisation of Natural Gas Fuel Injection written by Eric Jason Brombacher and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developement of Dedicated CNG Engine for Optimum Performance written by Tanaji Balawant Shinde and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diesel engines are invariably used in transportation and agricultural applications. It is a versatile prime mover due to its high fuel efficiency, low fuel cost and high reliability. But due to large scale use of diesel fuel, the smoke in the diesel exhaust and gaseous emissions are subjected to stringent legislation. To overcome the difficulty, research has led to development of various alternative fuels. Among the alternative fuels, gaseous fuels are preferred as they do not pose the problem of atomization. Recently, interest has grown in the natural gas and thus, compressed natural gas (CNG) has become important viable alternative fuel. There are four methods to inject the CNG into the engine cylinder, such as gas mixer/carburetor injection, manifold injection, port injection and direct injection. In port injection CNG engines, gaseous fuel is injected by fuel injector through intake port into combustion chamber.This project work presents improvement for air-fuel mixing in the combustion chamber by the use of pressurized flow of CNG inside the cylinder with the help of port fuel injection through intake port and selecting sutaible combustion chamber geometry.
Download or read book Computational Studies of Gas Injection Ignition and Combustion Emissions in a Direct injection Natural Gas Engine written by Kang Pan and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The direct-injection of natural gas into the compression-ignition engines is attractive, due to its emission advantage and diesel-equivalent efficiency. The computational simulation of this next-generation heavy-duty engine can provide deep insights of the gas injection and ignition characteristics and help understand the emission formation process, and hence, a KIVA-3v based three-dimensional computational model was developed and improved to represent the configuration of a glow plug assisted direct-injection natural gas engine. This thesis presents the important conclusions about the numerical studies of the natural gas ignition and emissions by using this engine computational model. Preliminary simulations revealed that the shield for a glow plug, an ignition assist for natural gas in compression-ignition engines, can highly improve the natural gas ignition stability compared to an unshielded glow plug, and the design of the glow plug shield has great potential for the further improvement of the natural gas ignition. The different shield designs, characterized by the parameters such as shield opening shape, number and distribution, were evaluated by using the improved KIVA model. The simulated results clearly demonstrated the three key functions of a good shield design. A multi-opening shield, consisting of four small openings in a diamond shape, can achieve all three requirements and hence highly reduce the natural gas ignition delay and improve the ignition stability, compared to the original single-opening shield. The proper emission models are critical for the numerical simulations of natural gas engine emissions. For the gaseous species, a kinetic package, CANTERA, is coupled to KIVA CFD code to simulate the formation of important emissions, such as C2H2 and NOx. However, the available detailed mechanisms, such as GRI-3.0, will over-predict the ignition delay at low temperature (
Download or read book Compressed Natural Gas Direct Injection Comparison Between Homogeneous and Stratified Combustion written by Shahrir Abdullah and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to abundance of natural gas, the use of natural gas for automotive use, particularly for internal combustion engine (ICE), is more practical and cheaper than their future successors. Even though natural gas is a cleaner fuel than other fossil fuels and has a higher octane number and can lead to higher thermal efficiency, its low carbon number makes it less attractive as compared to gasoline and diesel. Based on its potential, an engine referred to as compressed natural gas direct injection engine (CNGDI) was designed, developed and tested to operate on compressed natural gas (CNG) as monofuel directly and centrally injected into the engine. Computational and experimental works have been performed to investigate the viability of the design. Computational fluid dynamics (CFD) simulations and experimental works with homogenous combustion showed that the results were in good agreement. From experimental works, it is found that combustion characteristics could be improved by using a stratified charge piston configuration with some drawback on performance. In terms of exhaust emissions, stratified configuration causes slight increase in the emission of CO, CO2 and NOx, which highlight a need for further study on this issue.
Download or read book Modelling Spark Ignition Combustion written by P. A. Lakshminarayanan and published by Springer Nature. This book was released on with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
