Three-dimensional Multi-physics Modeling Methodology to Study Engine Cylinder-kit Assembly Tribology and Design Considerations - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Three-dimensional Multi-physics Modeling Methodology to Study Engine Cylinder-kit Assembly Tribology and Design Considerations write by Sadiyah Sabah Chowdhury. This book was released on 2021. Three-dimensional Multi-physics Modeling Methodology to Study Engine Cylinder-kit Assembly Tribology and Design Considerations available in PDF, EPUB and Kindle. Engine cylinder-kit tribology is pivotal to durability, emission management, friction, oil consumption, and efficiency of the internal combustion engine. The piston ring pack dynamics and the flow dynamics are critical to engine cylinder-kit tribology and design considerations. A three-dimensional (3D), multi-physics methodology is developed to investigate the liquid oil- combustion gas transport and oil evaporation mechanisms inside the whole domain of the cylinder kit assembly during the four-stroke cycle using multiple simulation tools and high-performance computing. First, a CASE (Cylinder-kit Analysis System for Engines) 1D model is developed to provide necessary boundary conditions for the subsequent steps of the chain of simulations. Next, the ring-bore and ring groove conformability along with the twist angle variation across the circumference are investigated by modeling a twisted ring via a 3D ring FEA contact model. The ring twist induces change in ring location which subsequently changes the cylinder kit geometry dynamically across the cycle. The dynamically varying geometries are generated using the LINCC (Linking CASE to CFD) program. Finally, a three-dimensional multiphase flow model is developed for the dynamic geometries across the cycle using CONVERGE. The methodology is first applied on a small-bore (50 mm) engine running at 2000 rpm. Next, a CASE 1-D model is developed and calibrated via HEEDS across a range of load-speed operating conditions of a Cummins 6-cylinder, 137.02 mm bore, Acadia engine. The 1800 RPM, full load condition with a positively twisted second ring is selected for the experimental validation of the 3-D methodology. A study of the second ring dynamics in the small-bore engine showed the effect of negative ring twist on the three-dimensional fluid flow physics. The oil (liquid oil and oil vapor) transport and combustion gas flow processes through the piston ring pack for the twisted and untwisted geometry configurations are compared. A comparison with the untwisted geometry for this cylinder-kit shows that the negatively twisted second ring resulted in a higher blowby but lower reverse blowby and oil consumption. The comparison of the model predicted oil consumption with existing literature shows that oil consumption is within the reasonable range for typical engines. The blowby, second land pressures and third land pressures comparison with the experimental results of Cummins Acadia engine showed considerable agreement. The reverse blowby and oil consumption along with the liquid oil and oil vapor mass fraction distribution pattern across the cycle are also analyzed.In the later section of this work surface texture characterization of a novel Abradable Powder Coating (APC) and stock piston skirt coatings of a Cummins 2.8 L Turbo engine is conducted. The surface texture and characteristic properties varying across the piston skirt are obtained and analyzed via a 3D optical profiler and OmniSurf3D software. The engine operating conditions are found through a combination of measurements, testing, and a calibrated GT-Power model. The variable surface properties along with other geometric, thermodynamic, material properties are utilized to build a model in CASE for both APC and stock coated pistons. The Surface texture analysis shows that the APC coating has a unique feature of mushroom cap-like surface and deeper valleys that could potentially be beneficial for lubrication and oil retention. Comparison of different performance parameters from CASE simulation results shows that APC has the potential to be a suitable candidate for piston skirt coating.
An Intelligent System for Engine Tribological Design
An Intelligent System for Engine Tribological Design - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook An Intelligent System for Engine Tribological Design write by Xiangju Zhang. This book was released on 2004-07-14. An Intelligent System for Engine Tribological Design available in PDF, EPUB and Kindle. The internal combustion is widely used as a power source in engineering. As the demands placed upon engines have increased, tribology has come to play an increasingly important role in their development.This book is a creative combination of intelligent design technology and the tribological design of engines: engine tribology, information science, artificial intelligence, non numerical algorithms, modern design technology and dynamics to propose new methodology and technology for tribological engine design. It not only presents an effective approach to l engine design but also explores a new pattern for research and l design methodology. · An essential reference for the design of more effective and efficient engines· Proposes new techniques for tribological engine design· Combines advanced design technologies with traditional tribological design methods
Three Dimensional Analysis of the Gas Flow in Piston Ring Pack
Three Dimensional Analysis of the Gas Flow in Piston Ring Pack - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Three Dimensional Analysis of the Gas Flow in Piston Ring Pack write by Ali Kharazmi. This book was released on 2017. Three Dimensional Analysis of the Gas Flow in Piston Ring Pack available in PDF, EPUB and Kindle.
Modeling and Simulation of Functionalized Materials for Additive Manufacturing and 3D Printing: Continuous and Discrete Media
Modeling and Simulation of Functionalized Materials for Additive Manufacturing and 3D Printing: Continuous and Discrete Media - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Modeling and Simulation of Functionalized Materials for Additive Manufacturing and 3D Printing: Continuous and Discrete Media write by Tarek I. Zohdi. This book was released on 2017-12-22. Modeling and Simulation of Functionalized Materials for Additive Manufacturing and 3D Printing: Continuous and Discrete Media available in PDF, EPUB and Kindle. Within the last decade, several industrialized countries have stressed the importance of advanced manufacturing to their economies. Many of these plans have highlighted the development of additive manufacturing techniques, such as 3D printing which, as of 2018, are still in their infancy. The objective is to develop superior products, produced at lower overall operational costs. For these goals to be realized, a deep understanding of the essential ingredients comprising the materials involved in additive manufacturing is needed. The combination of rigorous material modeling theories, coupled with the dramatic increase of computational power can potentially play a significant role in the analysis, control, and design of many emerging additive manufacturing processes. Specialized materials and the precise design of their properties are key factors in the processes. Specifically, particle-functionalized materials play a central role in this field, in three main regimes: (1) to enhance overall filament-based material properties, by embedding particles within a binder, which is then passed through a heating element and the deposited onto a surface, (2) to “functionalize” inks by adding particles to freely flowing solvents forming a mixture, which is then deposited onto a surface and (3) to directly deposit particles, as dry powders, onto surfaces and then to heat them with a laser, e-beam or other external source, in order to fuse them into place. The goal of these processes is primarily to build surface structures which are extremely difficult to construct using classical manufacturing methods. The objective of this monograph is introduce the readers to basic techniques which can allow them to rapidly develop and analyze particulate-based materials needed in such additive manufacturing processes. This monograph is broken into two main parts: “Continuum Method” (CM) approaches and “Discrete Element Method” (DEM) approaches. The materials associated with methods (1) and (2) are closely related types of continua (particles embedded in a continuous binder) and are treated using continuum approaches. The materials in method (3), which are of a discrete particulate character, are analyzed using discrete element methods.
Tribology of Additively Manufactured Materials
Tribology of Additively Manufactured Materials - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Tribology of Additively Manufactured Materials write by Pradeep Menezes. This book was released on 2022-08-12. Tribology of Additively Manufactured Materials available in PDF, EPUB and Kindle. Tribology of Additively Manufactured Materials: Fundamentals, Modeling, and Applications starts with a look at the history, methods and mechanics of additive manufacturing (AM), focusing on power bed fusion-based and direct energy deposition-based additive manufacturing. Following sections of the book provide a foundational background in the fundamentals of tribology, covering the basics of surface engineering, friction and wear, corrosion and tribocorrosion, and the tribological considerations of a variety of AM materials, such as friction and wear in non-metallic and metallic AM materials, degradation in non-metallic AM components, and corrosion and tribocorrosion in AM components. The book then concludes with a section covering modeling and simulation scenarios and challenges related to the tribology of AM materials, providing readers with the processing conditions needed to extend and strengthen the lifetime and durability of AM materials and components. - Provides theoretical, experimental and computational data for a better understanding of the complex tribological behaviors in additively manufactured components - Discusses applications of additively manufactured components, considering their tribological properties - Studies how unique surface roughness and texture develop in additively manufactured components and how these unique characteristics affect their tribological function - Outlines variables, additive manufacturing methods and performance of additively manufactured components - Equips readers with a better understanding of degradation effects due to tribology and corrosion
