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Gas Jet Studies For The Characterization Of Advanced Injection Schedules And Bowl Design In Diesel Engines
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Book Synopsis Gas Jet Studies for the Characterization of Advanced Injection Schedules and Bowl Design in Diesel Engines by : Meghan Borz
Download or read book Gas Jet Studies for the Characterization of Advanced Injection Schedules and Bowl Design in Diesel Engines written by Meghan Borz and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In-cylinder strategies such as advanced fuel injection schedules and optimal piston bowl designs are often utilized in diesel combustion for to improve efficiency and/or reduce emissions. The large design space for injection schedules makes choosing the optimal schedule for an engine particularly challenging. Additionally, experimental in-engine studies of advanced injection schedules are time-consuming and costly. Gas jet experiments can provide a good approximation for the behavior of diesel jets and more tests can be conducted in a shorter period of time without incurring the costs of an engine research facility. The goal of this work is to gain a further understanding of some of the fundamental fluid mechanics of multiple injections, jet-jet interactions, and jets impinging on surfaces.Gas jet experiments are conducted using z-schlieren and acetone tracer planar laser-induced fluorescence (PLIF). Three studies are conducted focusing on free jets, multiple jet interactions, jet-jet interaction, and bowl geometry effects. The first study is a comparison of penetration results for helium gas jets with penetration results for vaporizing and non-vaporizing sprays, which shows that by non-dimensionalizing the results of gas jet experiments, the penetration curve follows a similar trend to the non-dimensionalized penetration curve for vaporizing and non-vaporizing liquid sprays.The second study explores the fluid mechanic interactions between multiple injections and the effects of injection duration and dwell. The schlieren results of the multiple-injection studies showed that before the end of injection (EOI) the non-dimensional jet-tip penetration was not significantly different for the first and second injection, however, the average dispersion half angle during the quasi-steady portion of injection was higher for the first injection than for the second injection. There are two multiple-injection cases where the average dispersion half angle of the second injection is higher than that of the first injection by a statistically significant amount. These differences in jet dispersion angle are indicative of differences in mixing and entrainment during the first and second injections. Future studies with acetone-PLIF will allow the concentration to be quantified and differences in the jet composition for the first and second injections in multiple-injection schemes to be compared.The last study focuses on the effects of piston bowl geometry and the angle between interacting jets. The effects of the geometry on fluid recirculation and mixing are studied using schlieren and PLIF with jets of acetone vapor and air and two different piston bowl designs. The results showed that a deeper bowl and wider angle between the jets allows for improved mixing and air utilization.
Book Synopsis Characterization of Impinging Diesel Sprays with a Reduced-order Model and Gas Jet Experiments by : Daniel Ruth
Download or read book Characterization of Impinging Diesel Sprays with a Reduced-order Model and Gas Jet Experiments written by Daniel Ruth and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The mixing of a diesel spray with in-cylinder gases is driven by both turbulent mixing during the free-jet penetration phase and by mixing during its impingement on surfaces such as the piston bowl. Current reduced order models, and many experiments, focus solely on the free-jet penetration phase, although jet-wall interaction occurs during a significant portion of the duration of a fuel injection in both small-bore and large-bore engines. A control volume-based model for the spreading of an impinging spray along a flat wall is presented as a first step towards capturing key jet processes during the impingement phase of fuel injection. Schlieren measurements of impinging gaseous jets are used to evaluate the model, and a strategy of accounting for the varying density in gas jet injections is introduced. The model, coupled with the free jet model of Musculus and Kattke, is shown to predict published impinging diesel data as well. The model is then used to compare global entrainment effects at various diesel conditions, providing a means for evaluating the effects of combustion parameters on entrainment with more realistic engine geometries. Finally, mixing phenomena relating to advanced combustion techniques, including rate-shaping and the use of multiple injections, are investigated with the model.
Book Synopsis Investigations of Advanced Injection and Combustion Strategies on DI Diesel Engine Performance and Emissions by : Raouf Mobasheri
Download or read book Investigations of Advanced Injection and Combustion Strategies on DI Diesel Engine Performance and Emissions written by Raouf Mobasheri and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main driving force behind this research was the need for cleaner and more efficient engines to meet the ever-increasing demands on the modern automobile's emissions. In recent years different studies have been carried out to analyze the combined effects of high-pressure injection, boost pressure, multiple injections, included spray angle and combustion chamber geometry. Though considerable research has shown these technologies can meet the low emission regulations, the careful optimization of the engine operating conditions is still required in order to get the full benefit of the different strategies. With these issues as motivation, the first important objective of this study was to gain a detailed understanding of the mechanisms through which fuel injection interacts with other engine parameters and influences diesel combustion and emissions, and hence to attempt to generalize the adoption of multiple injection strategies with regards to improving diesel engine performance. For this purpose, a modified parameter called "Homogeneity Factor of in-cylinder charge" (HF) was introduced and proposed as a new measure in combustion theory to analyze the combustion characteristics and air-fuel mixing process of diesel engines in more detail. The second part of this research builds upon a detail investigation on the included spray cone angle concept and explores further their use in conjunction with multiple-injection strategies in diesel engines. In addition, an investigation was performed in third phase of this research to analyze the effects of piston geometry on combustion, performance and exhaust emission characteristics. The results showed that employing a post-injection combined with a pilot injection results in reduced soot formation from diffusion combustion and enhances the soot oxidation process during the expansion stroke, resulting in decreased soot emissions, while the NOx concentration is maintained in low levels. It was also found that spray targeting is very effective for controlling the in-cylinder mixture distributions especially when it accompanied with advanced injection strategies. Moreover, the results confirmed that a narrower width of piston bowl has a higher unburned fuel air mixture region and hence results in higher soot emissions but with slightly larger piston surface area the optimum operating point could be obtained.
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 1994 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Compression Ignition Natural Gas – Diesel Dual Fuel Engines by : Hongsheng Guo
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:
Book Synopsis Modelling and Observation of Exhaust Gas Concentrations for Diesel Engine Control by : Dr.-Ing. David Blanco-Rodriguez
Download or read book Modelling and Observation of Exhaust Gas Concentrations for Diesel Engine Control written by Dr.-Ing. David Blanco-Rodriguez and published by Springer. This book was released on 2014-05-19 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents a complete new methodology for the on-board measurements and modeling of gas concentrations in turbocharged diesel engines. It provides the readers with a comprehensive review of the state-of-art in NOx and lambda estimation and describes new important achievements accomplished by the author. These include: the online characterization of lambda and NOx sensors; the development of control-oriented models of lambda and NOx emissions; the design of computationally efficient updating algorithms; and, finally, the application and evaluation of the methods on-board. Because of its technically oriented approach and innovative findings on both control-oriented algorithms and virtual sensing and observation, this book offers a practice-oriented guide for students, researchers and professionals working in the field of control and information engineering.
Author :PEP (Professional Engineering Publishers) Publisher :John Wiley and Sons ISBN 13 :9781860583995 Total Pages :276 pages Book Rating :4.5/5 (839 download)
Book Synopsis Fuel Injection Systems 2003 by : PEP (Professional Engineering Publishers)
Download or read book Fuel Injection Systems 2003 written by PEP (Professional Engineering Publishers) and published by John Wiley and Sons. This book was released on 2003-04-29 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fuel Injection Systems addresses key issues in fuel delivery and associated technologies which are evolving faster than ever. The rapid technological change has reduced product life cycles resulting in rapid evolution of design and development methods to enable timely delivery of increasingly complex technology. This is vital as the demands on engines are increasingly stringent, especially in the field of emissions, new fuel injection systems are being developed to meet these challenges, not only in passenger cars but also for heavy duty as well as large engine applications. This volume brings together international contributions from the leading experts in industry and the latest research from academia to provide a comprehensive update to all those working in design, development, and manufacturing of fuel injection systems. Contents include: Emission reduction with advanced two-actuator EUI for heavy-duty diesel engines Investigation of a two valve electronically controlled unit injector on a Euro IV heavy duty diesel engine using design of experiment methods Characterization of in-cylinder fuel distribution from an air-assisted fuel injection system using advanced laser diagnostics High contact stress applications of a silicon nitride in modern diesel engines The use of the HLMI (hydraulic leak measurement unit) Komatsu STA 6DI40 water emulsified fuel engine Timely control of diesel combustion using water injection
Book Synopsis Some Experiments in Connexion with the Injection and Combustion of Fuel-oil in Diesel Engines by : Charles John Hawkes
Download or read book Some Experiments in Connexion with the Injection and Combustion of Fuel-oil in Diesel Engines written by Charles John Hawkes and published by . This book was released on 1921 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fuel Injection Systems 2003 by : PEP (Professional Engineering Publishers)
Download or read book Fuel Injection Systems 2003 written by PEP (Professional Engineering Publishers) and published by Wiley. This book was released on 2003-04-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fuel Injection Systems addresses key issues in fuel delivery and associated technologies which are evolving faster than ever. The rapid technological change has reduced product life cycles resulting in rapid evolution of design and development methods to enable timely delivery of increasingly complex technology. This is vital as the demands on engines are increasingly stringent, especially in the field of emissions, new fuel injection systems are being developed to meet these challenges, not only in passenger cars but also for heavy duty as well as large engine applications. This volume brings together international contributions from the leading experts in industry and the latest research from academia to provide a comprehensive update to all those working in design, development, and manufacturing of fuel injection systems. Contents include: Emission reduction with advanced two-actuator EUI for heavy-duty diesel engines Investigation of a two valve electronically controlled unit injector on a Euro IV heavy duty diesel engine using design of experiment methods Characterization of in-cylinder fuel distribution from an air-assisted fuel injection system using advanced laser diagnostics High contact stress applications of a silicon nitride in modern diesel engines The use of the HLMI (hydraulic leak measurement unit) Komatsu STA 6DI40 water emulsified fuel engine Timely control of diesel combustion using water injection
Book Synopsis Modeling Injection and Ignition in Direct Injection Natural Gas Engines by : Xu Jr Cheng
Download or read book Modeling Injection and Ignition in Direct Injection Natural Gas Engines written by Xu Jr Cheng and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of Fuel Economy Technologies for Light-Duty Vehicles by : National Research Council
Download or read book Assessment of Fuel Economy Technologies for Light-Duty Vehicles written by National Research Council and published by National Academies Press. This book was released on 2011-06-03 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various combinations of commercially available technologies could greatly reduce fuel consumption in passenger cars, sport-utility vehicles, minivans, and other light-duty vehicles without compromising vehicle performance or safety. Assessment of Technologies for Improving Light Duty Vehicle Fuel Economy estimates the potential fuel savings and costs to consumers of available technology combinations for three types of engines: spark-ignition gasoline, compression-ignition diesel, and hybrid. According to its estimates, adopting the full combination of improved technologies in medium and large cars and pickup trucks with spark-ignition engines could reduce fuel consumption by 29 percent at an additional cost of $2,200 to the consumer. Replacing spark-ignition engines with diesel engines and components would yield fuel savings of about 37 percent at an added cost of approximately $5,900 per vehicle, and replacing spark-ignition engines with hybrid engines and components would reduce fuel consumption by 43 percent at an increase of $6,000 per vehicle. The book focuses on fuel consumption-the amount of fuel consumed in a given driving distance-because energy savings are directly related to the amount of fuel used. In contrast, fuel economy measures how far a vehicle will travel with a gallon of fuel. Because fuel consumption data indicate money saved on fuel purchases and reductions in carbon dioxide emissions, the book finds that vehicle stickers should provide consumers with fuel consumption data in addition to fuel economy information.
Book Synopsis Modelling and Observation of Exhaust Gas Concentrations for Diesel Engine Control by : Dr.-Ing. David Blanco-Rodriguez
Download or read book Modelling and Observation of Exhaust Gas Concentrations for Diesel Engine Control written by Dr.-Ing. David Blanco-Rodriguez and published by Springer. This book was released on 2014-06-03 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents a complete new methodology for the on-board measurements and modeling of gas concentrations in turbocharged diesel engines. It provides the readers with a comprehensive review of the state-of-art in NOx and lambda estimation and describes new important achievements accomplished by the author. These include: the online characterization of lambda and NOx sensors; the development of control-oriented models of lambda and NOx emissions; the design of computationally efficient updating algorithms; and, finally, the application and evaluation of the methods on-board. Because of its technically oriented approach and innovative findings on both control-oriented algorithms and virtual sensing and observation, this book offers a practice-oriented guide for students, researchers and professionals working in the field of control and information engineering.
Book Synopsis Fuel Injection Systems 2003 by : PEP (Professional Engineering Publishers)
Download or read book Fuel Injection Systems 2003 written by PEP (Professional Engineering Publishers) and published by Wiley. This book was released on 2003-04-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fuel Injection Systems addresses key issues in fuel delivery and associated technologies which are evolving faster than ever. The rapid technological change has reduced product life cycles resulting in rapid evolution of design and development methods to enable timely delivery of increasingly complex technology. This is vital as the demands on engines are increasingly stringent, especially in the field of emissions, new fuel injection systems are being developed to meet these challenges, not only in passenger cars but also for heavy duty as well as large engine applications. This volume brings together international contributions from the leading experts in industry and the latest research from academia to provide a comprehensive update to all those working in design, development, and manufacturing of fuel injection systems. Contents include: Emission reduction with advanced two-actuator EUI for heavy-duty diesel engines Investigation of a two valve electronically controlled unit injector on a Euro IV heavy duty diesel engine using design of experiment methods Characterization of in-cylinder fuel distribution from an air-assisted fuel injection system using advanced laser diagnostics High contact stress applications of a silicon nitride in modern diesel engines The use of the HLMI (hydraulic leak measurement unit) Komatsu STA 6DI40 water emulsified fuel engine Timely control of diesel combustion using water injection
Book Synopsis Characterization of a High-pressure Diesel Fuel Injection System as a Control Technology Option to Improve Engine Performance and Reduce Exhaust Emissions by : John J. McFadden
Download or read book Characterization of a High-pressure Diesel Fuel Injection System as a Control Technology Option to Improve Engine Performance and Reduce Exhaust Emissions written by John J. McFadden and published by . This book was released on 1983 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigations of Advanced Injection and Combustion Strategies in Low-emissions Diesel Engines by : Sage L. Kokjohn
Download or read book Investigations of Advanced Injection and Combustion Strategies in Low-emissions Diesel Engines written by Sage L. Kokjohn and published by . This book was released on 2008 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Very High Pressure Fuel-Injection for High-BMEP DI-Diesel Engine by :
Download or read book Study of Very High Pressure Fuel-Injection for High-BMEP DI-Diesel Engine written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to help design a high-power-density (HPD) low-heat-rejection (LHR) high-injection-fuel (HIP) direct-injection compression-ignition engine (DI-CI, two main methods were employed: (1) engine performance analysis; and (2) in-cylinder imaging. In the performance analysis, a Cummins 903 engine was used. The range of air/fuel ratio studied was from 18-1 to over 35-1, the injection pressure investigated was as high as 30,625 psi (210 Mpa) under varied intake air temperature over 150 deg C. In the in-cylinder imaging, a separate optical single-cylinder Cummins 903 engine was used. A high-speed four-color IR digital imaging system was greatly improved during this contract period. New spectrometric methods were developed to simultaneously determine the distributions of temperature, water vapor and soot concentrations. In addition, a new data analysis and presentation method has been developed. The performance analysis results are reported in two parts: a preliminary report as included in Appendix-I and an additional set of results (Appendix-Ill). Some of the in-cylinder imaging results, which are now being captured by the improved 515 after incorporating with new electronic packages (designed and fabricated in our laboratory), are included with discussions.
Author :American Society of Mechanical Engineers. Diesel and Gas Engine Power Division Publisher : ISBN 13 : Total Pages :138 pages Book Rating :4.E/5 ( download)
Book Synopsis Gaseous Fluid Flow in Relation to Diesel and Internal Combustion Engine Design by : American Society of Mechanical Engineers. Diesel and Gas Engine Power Division
Download or read book Gaseous Fluid Flow in Relation to Diesel and Internal Combustion Engine Design written by American Society of Mechanical Engineers. Diesel and Gas Engine Power Division and published by . This book was released on 1949 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
