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The performance of a single-cylinder, low speed, spark ignition, internal combustion engine has been studied using lean (i.e, air-rich) mixtures of propane as the fuelo The power output and thermal efficiencies have been determined at various compression ratios and fuel-air ratios. A comparison is also made with the en gine when burning gasoline. Maximum operating fuel economy is obtained at a fuel-air ratio of 0 o 04 lb. of propane per lb. of air, regardless of the compression ratio. It is also shown that the overall performance of an engine may be im proved by burning propane as the fuel at a higher com pression ratio than burning gasoline at a lower CR. A theoretical analysis is also shown for obtain ing "cycle" temperatures, indicated thermal efficiency and brake mean effective pressure.
A comprehensive resource covering the foundational thermal-fluid sciences and engineering analysis techniques used to design and develop internal combustion engines Internal Combustion Engines: Applied Thermosciences, Fourth Edition combines foundational thermal-fluid sciences with engineering analysis techniques for modeling and predicting the performance of internal combustion engines. This new 4th edition includes brand new material on: New engine technologies and concepts Effects of engine speed on performance and emissions Fluid mechanics of intake and exhaust flow in engines Turbocharger and supercharger performance analysis Chemical kinetic modeling, reaction mechanisms, and emissions Advanced combustion processes including low temperature combustion Piston, ring and journal bearing friction analysis The 4th Edition expands on the combined analytical and numerical approaches used successfully in previous editions. Students and engineers are provided with several new tools for applying the fundamental principles of thermodynamics, fluid mechanics, and heat transfer to internal combustion engines. Each chapter includes MATLAB programs and examples showing how to perform detailed engineering computations. The chapters also have an increased number of homework problems with which the reader can gauge their progress and retention. All the software is ‘open source’ so that readers can see in detail how computational analysis and the design of engines is performed. A companion website is also provided, offering access to the MATLAB computer programs.
This book presents an energetic approach to the performance analysis of internal combustion engines, seen as attractive applications of the principles of thermodynamics, fluid mechanics and energy transfer. Paying particular attention to the presentation of theory and practice in a balanced ratio, the book is an important aid both for students and for technicians, who want to widen their knowledge of basic principles required for design and development of internal combustion engines. New engine technologies are covered, together with recent developments in terms of: intake and exhaust flow optimization, design and development of supercharging systems, fuel metering and spray characteristic control, fluid turbulence motions, traditional and advanced combustion process analysis, formation and control of pollutant emissions and noise, heat transfer and cooling, fossil and renewable fuels, mono- and multi-dimensional models of termo-fluid-dynamic processes.