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Lecture:
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Day and Time: Tuesday and Thursday, 1:30 - 2:50 pm
Location: SH 220
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Instructor Office Hours:
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Time: Thursdays: 12:00 - 1:00 PM
Location: Scaife Hall 319
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TA Office Hours:
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Time: Wednesdays: 5:00 - 6:00 PM
Location: SH 203
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Course Description:
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This course will provide an understanding of the working principles of conventional and advanced internal combustion (IC) engines. Emphasis will be given to thermodynamic, fluid mechanic, and combustion aspects of the IC engine. After taking this course, students will be able to gain a general understanding of how combustion system configuration, in-cylinder fluid flow, chemical characteristics of fuels, engine heat transfer, and in-cylinder fuel-air mixing affect performance and pollutant emissions from automotive and heavy-duty type IC engines. Students will analyze data obtained from a multi-fuel variable compression ratio gasoline engine. Students will also perform simulations of a diesel engine combustion system using computational fluid dynamics (CFD).
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Prerequisites:
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Thermodynamics, Fluid Mechanics or equivalent
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Textbook:
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- Internal Combustion Engine Fundamentals, John Heywood
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Grading:
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- Homework (40%)
- Lab data anaysis and reporting (10%)
- CFD project (20%)
- Exam 1 (15%)
- Exam 2 (15%)
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Tentative Syllabus Outline:
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Aug 27 - Dec 07 (15 weeks)
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Week 1
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Introduction and Operating Principles
History of IC engines, arrangement of pistons, 2-stroke vs 4-stroke cycles, types of combustion systems
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Week 2
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Geometric and Performance Parameters
Engine geometric terminology, relationship of crank and piston motions, introduction to important performance parameters
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Week 3
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Intake System and Air Handling
Valve arrangement, valve motion and timing, various losses in intake system, volumetric efficiency, factors affecting volumetric efficiency, intake charge boosting (supercharger vs turbocharger)
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Week 4
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Fuels and Thermochemistry
Engine fuels and their chemical characteristics, chemistry of combustion reactions, calculation of fuel heating value, maximum flame temperature, engine exhaust gas analysis
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Week 5
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Thermodynamic Analysis of Engine Cycles
Air-standard Otto and Diesel cycles, Brayton cycle, comparison of ideal and real cycles, introduction to over-expanded cycle, maximum possible work
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Week 6
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Spark Ignited (SI) Engine Combustion
Fuel metering and mixture preparation, spark ignition, flame development, abnormal combustion, effect of engine parameters on performnace and knock
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Week 7
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Compression Ignited (CI) Engine Combustion
Combustion system configurations, fuel injection, spray breakup, different phases of diesel combustion, flame structure, burning rate analysis
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Week 8
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Fluid Mechanic Interaction with Combustion-I
Turbulence generation, tumbling and swirling flows
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Oct 18
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Exam 1
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Week 9
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Fluid Mechanic Interaction with Combustion-II
Coupling of in-cylinder flow and combustion, concepts of laminar and turbulent burning speeds
Pollutant Formation and Control
Types of pollutants, sources of pollutants in SI and CI engines, technologies to mitigate pollutant formation, treatment of exhaust gas
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Week 10
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Introduction to Advanced Engine Concepts
Gasoline direct injection engines, HCCI engines, dual-fuel engines, introduction to hybrid vehicles, series vs parallel hybrid systems
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Week 11
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Computer Simulations of IC Engines
Purpose of simulations, phenomenological models for SI and diesel engine combustion, introduction to engine CFD analysis, Training to setup diesel engine combustion analysis in commercial CFD software. After this training, students will be able to work on computational project.
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Week 12
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Engine Heat Transfer
Energy flow in IC engine, various modes of heat transfer, effect of heat transfer on engine efficiency at various speeds and loads
Waste Heat Recovery from IC Engines
Thermodynamic analysis of energy balance, introduction of Sterling engine and thermoelectrics for heat recovery
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Week 13
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Engine Operating Characteristics and Performnace
Various powers vs RPM, effect of spark timing and fuel/air ratio on power and efficiency, effect of EGR on effieicny and MBT timing, effect of compression ratio and engine size on efficiency, engine performance
Thanksgiving break
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Week 14
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Gas Turbine Engines
Brayton cycle analysis, combustor design and performance
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Dec 04
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CFD project presentations
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Dec 06
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Exam 2
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