Download or read book CFD Modeling of the Scavenging and Natural Gas Injection Processes in a Two stroke Diesel Engine written by Felix Robert Jeske and published by . This book was released on 1991 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CFD Modelling and Investigation of Two stroke Dual fuel Marine Engines with High Pressure Gas Admission written by Renyou Yang and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to their durability, cost-effectiveness and high efficiency, the large two-stroke marine engines are widely used by the merchant ships. However, as the conventional two-stroke diesel engines suffer from the high pollutants emissions, the dual fuel versions burning natural gas and pilot fuel to initiate combustion is an alternative, which can considerably reduce the engine environmental footprint. The application of the high pressure and direct injection of the natural gas can remarkably benefit the emissions. In order to understand in-depth the full-cycle operating processes in a two-stroke dual fuel marine engine with high-pressure gas direct injection, the related CFD models were customized and developed by the use of ANSYS Fluent, and validated by employing available experimental data. Subsequently, the parametric investigation of the dual fuel injection was conducted and the recommended sets of design parameters are identified. Furthermore, the internal processes in the whole cycle of the engine dual fuel and the diesel operating mode were analysed and compared.The spray process of the liquid/pilot fuel was modelled and validated by the available experimental data, taking into account the variable Thermophysical liquid fuel properties with the ambient conditions. Aiming to develop the models for the high-pressure gas injection, the conserving-equation sources approach was developed, considering the effects of the barrel-shaped shocks patterns near the nozzle exit. The derived CFD models were validated by the published measured penetrations of nitrogen injection under two pressure ratios values.As the diffusion flame dominates in the high-pressure direct injection (HPDI) gas combustion, the non-premixed dual fuel combustion model was developed, in which the pilot fuel combustion was treated as the ignition kernel. Based on the measurements in the rapid compression and expansion machine (RCEM), the derived heat release rate (HRR) and the NO emission was used to validate the CFD results. By comparing the results of the two investigated non-premixed combustion models, the steady flamelet diffusion model was recommended, where the reaction rates of Hanson and Salimian (1984) for the extended Zeldvich mechanism were applied.In order to determine the injection and geometric parameters of dual fuel operation in the marine engine S60ME, the parametric research of HPDI, combustion processes was conducted with the aim to maintain the power level and reduce the NO and CO2 emissions. The investigated parameters included the dual fuel injection timing, the gas injection duration, the lateral angle of gas nozzle, the holes number of gas injector, and the different inclination angle for each gas hole.Based on the results of the conducted parametric study, the dual fuel design parameters for the marine engine S60ME were recommended. By using the developed dual fuel combustion models, the whole-cycle processes in the large two-stroke marine dual fuel engine were investigated, by comparing the diesel model operating mode. The results indicated that the NO and CO2 emissions for the dual fuel mode were lower than that of the diesel mode by 31% and 21% respectively. The diffusion flame for the diesel mode was located downstream the liquid vapour plumes, whilst the dual fuel mode exhibited the high-temperature flame in the vicinity of the stoichiometric surface of the gas plumes. Moreover, the diesel mode achieved the higher flame temperature than the dual fuel mode. Due to the lower carbon dioxide (CO2) for the duel fuel combustion, the scavenging efficiency for the dual fuel mode was 4.2% higher than that of the diesel mode.
Download or read book Advanced technologies in flow dynamics and combustion in propulsion and power volume II written by Lei Luo and published by Frontiers Media SA. This book was released on 2023-02-09 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Analysis of Injection Processes in an Innovative 3D CFD Tool for the Simulation of Internal Combustion Engines written by Marlene Wentsch and published by Springer. This book was released on 2018-05-16 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the large number of influencing parameters and interactions, the fuel injection and therewith fuel propagation and distribution are among the most complex processes in an internal combustion engine. For this reason, injection is usually the subject to highly detailed numerical modeling, which leads to unacceptably high computing times in the 3D-CFD simulation of a full engine domain. Marlene Wentsch presents a critical analysis, optimization and extension of injection modeling in an innovative, fast response 3D-CFD tool that is exclusively dedicated to the virtual development of internal combustion engines. About the Author Marlene Wentsch works as research associate in the field of 3D-CFD simulations of injection processes at the Institute of Internal Combustion Engines and Automotive Engineering (IVK), University of Stuttgart, Germany.
Download or read book Advanced Combustion Technologies for Low Carbon Emissions written by Jun Li and published by Frontiers Media SA. This book was released on 2023-07-10 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integrated analysis of the scavenging process in marine two stroke diesel engines written by Fredrik Herland Andersen and published by . This book was released on 2015 with total page 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 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of the Scavenging Efficiency in a Direct injection Two stroke Engine written by David Michael Bevan and published by . This book was released on 2000 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scavenging Measurements in a Direct injection Two stroke Engine written by Hickory Zachariah Foudray and published by . This book was released on 2002 with total page 246 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 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rapport written by Fredrik Herland Andersen and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME 71 DGP 8 written by Arunachalam Kannappan and published by . This book was released on 1971 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Scavenging and Plugging in a Twin cylinder Two Stroke Engine Using CFD written by Yangbing Zeng and published by . This book was released on 2003 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Fluid Dynamics Investigation of the Scavenging Process in a Two stroke Engine written by Laurine J. Leep and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of a Two stroke Engine Scavenging Cycle with KIVA 2x3 written by Douglas J. Lofgren and published by . This book was released on 1995 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Scavenging Process in the Two stroke Engine written by E. Sher and published by . This book was released on 1989 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
