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Diesel Engine Transient Operation

Author : Constantine D. Rakopoulos
ISBN : 9781848823754
Genre : Technology & Engineering
File Size : 39.44 MB
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Traditionally, the study of internal combustion engines operation has focused on the steady-state performance. However, the daily driving schedule of automotive and truck engines is inherently related to unsteady conditions. In fact, only a very small portion of a vehicle’s operating pattern is true steady-state, e. g. , when cruising on a motorway. Moreover, the most critical conditions encountered by industrial or marine engines are met during transients too. Unfortunately, the transient operation of turbocharged diesel engines has been associated with slow acceleration rate, hence poor driveability, and overshoot in particulate, gaseous and noise emissions. Despite the relatively large number of published papers, this very important subject has been treated in the past scarcely and only segmentally as regards reference books. Merely two chapters, one in the book Turbocharging the Internal Combustion Engine by N. Watson and M. S. Janota (McMillan Press, 1982) and another one written by D. E. Winterbone in the book The Thermodynamics and Gas Dynamics of Internal Combustion Engines, Vol. II edited by J. H. Horlock and D. E. Winterbone (Clarendon Press, 1986) are dedicated to transient operation. Both books, now out of print, were published a long time ago. Then, it seems reasonable to try to expand on these pioneering works, taking into account the recent technological advances and particularly the global concern about environmental pollution, which has intensified the research on transient (diesel) engine operation, typically through the Transient Cycles certification of new vehicles.
Category: Technology & Engineering

Aircraft Propulsion And Gas Turbine Engines

Author : Ahmed F. El-Sayed
ISBN : 9781420008777
Genre : Technology & Engineering
File Size : 55.44 MB
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The escalating use of aircraft in the 21st century demands a thorough understanding of engine propulsion concepts, including the performance of aero engines. Among other critical activities,gas turbines play an extensive role in electric power generation, and marine propulsion for naval vessels and cargo ships. In the most exhaustive volume to date, this text examines the foundation of aircraft propulsion: aerodynamics interwoven with thermodynamics, heat transfer, and mechanical design. With a finely focused approach, the author devotes each chapter to a particular engine type, such as ramjet and pulsejet, turbojet, and turbofan. Supported by actual case studies, he illustrates engine performance under various operating conditions. Part I discusses the history, classifications, and performance of air breathing engines. Beginning with Leonardo and continuing on to the emergence of the jet age and beyond, this section chronicles inventions up through the 20th century. It then moves into a detailed discussion of different engine types, including pulsejet, ramjet, single- and multi-spool turbojet, and turbofan in both subsonic and supersonic applications. The author discusses Vertical Take Off and Landing aircraft, and provides a comprehensive examination of hypersonic scramjet and turbo ramjet engines. He also analyzes the different types of industrial gas turbines having single-and multi-spool with intercoolers, regenerators, and reheaters. Part II investigates the design of rotating compressors and turbines, and non-rotating components, intakes, combustion chambers, and nozzles for all modern jet propulsion and gas turbine engine systems, along with their performance. Every chapter concludes with illustrative examples followed by a problems section; for greater clarity, some provide a listing of important mathematical relations.
Category: Technology & Engineering

Aircraft Powerplants

Author : Michael J. Kroes
ISBN : UVA:X002444393
Genre : Technology & Engineering
File Size : 89.60 MB
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Aircraft Powerplants, Seventh Edition, part of the Glencoe Aviation Technology Series (formerly the Northrop Series), is the most comprehensive up-to-date powerplant book on the market today. It has been revised to reflect the latest changes in FAR Part 147 and changing industry needs. The new edition features expanded coverage of turbine engine theory and nomenclature. It also includes additional current models of turbofan, turboprop, and turboshaft engines. Information on turbine engine fuel, oil, ignition systems has been expanded and divided into separate chapters. And the remainder of the turbine engine material is updated and presented apart from reciprocating engines, allowing for the flexibility of teaching this materials separately or together. New material added to the propeller section deals with composite propellers, dynamic propeller blancing, and auxiliary propeller systems such as auto-feather, de-synchro-phasing, and de-ice. The updated and reorganized material on aircraft systems includes the latest information on control, indicating, and warning systems. Throughout the text, special emphasis has been laced on the integration of information regarding how individual components and systems operate together. This edition includes a new Student Study Guide that parallels the text. It provides fill-in-the-blank questions to identify key terms, demonstrates applications of mathematical relationships, and validates learning progress by offering multiple choice questions. The new Instructor's Manual provides answers to the review questions and transparency masters to help you illustrate key concepts.
Category: Technology & Engineering

Flight Theory And Aerodynamics

Author : Charles E. Dole
ISBN : 9781119233404
Genre : Technology & Engineering
File Size : 75.66 MB
Format : PDF, ePub
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The pilot's guide to aeronautics and the complex forces of flight Flight Theory and Aerodynamics is the essential pilot's guide to the physics of flight, designed specifically for those with limited engineering experience. From the basics of forces and vectors to craft-specific applications, this book explains the mechanics behind the pilot's everyday operational tasks. The discussion focuses on the concepts themselves, using only enough algebra and trigonometry to illustrate key concepts without getting bogged down in complex calculations, and then delves into the specific applications for jets, propeller crafts, and helicopters. This updated third edition includes new chapters on Flight Environment, Aircraft Structures, and UAS-UAV Flight Theory, with updated craft examples, component photos, and diagrams throughout. FAA-aligned questions and regulatory references help reinforce important concepts, and additional worked problems provide clarification on complex topics. Modern flight control systems are becoming more complex and more varied between aircrafts, making it essential for pilots to understand the aerodynamics of flight before they ever step into a cockpit. This book provides clear explanations and flight-specific examples of the physics every pilot must know. Review the basic physics of flight Understand the applications to specific types of aircraft Learn why takeoff and landing entail special considerations Examine the force concepts behind stability and control As a pilot, your job is to balance the effects of design, weight, load factors, and gravity during flight maneuvers, stalls, high- or low-speed flight, takeoff and landing, and more. As aircraft grow more complex and the controls become more involved, an intuitive grasp of the physics of flight is your most valuable tool for operational safety. Flight Theory and Aerodynamics is the essential resource every pilot needs for a clear understanding of the forces they control.
Category: Technology & Engineering

Holley

Author : Mike Urich
ISBN : 1557880522
Genre : Technology & Engineering
File Size : 90.64 MB
Format : PDF, Kindle
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Explains how carburetors, manifolds, and fuel injection systems work
Category: Technology & Engineering

Gas Turbine Propulsion Systems

Author : Bernie MacIsaac
ISBN : 9781119976141
Genre : Science
File Size : 57.25 MB
Format : PDF, ePub
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Major changes in gas turbine design, especially in the design and complexity of engine control systems, have led to the need for an up to date, systems-oriented treatment of gas turbine propulsion. Pulling together all of the systems and subsystems associated with gas turbine engines in aircraft and marine applications, Gas Turbine Propulsion Systems discusses the latest developments in the field. Chapters include aircraft engine systems functional overview, marine propulsion systems, fuel control and power management systems, engine lubrication and scavenging systems, nacelle and ancillary systems, engine certification, unique engine systems and future developments in gas turbine propulsion systems. The authors also present examples of specific engines and applications. Written from a wholly practical perspective by two authors with long careers in the gas turbine & fuel systems industries, Gas Turbine Propulsion Systems provides an excellent resource for project and program managers in the gas turbine engine community, the aircraft OEM community, and tier 1 equipment suppliers in Europe and the United States. It also offers a useful reference for students and researchers in aerospace engineering.
Category: Science

Star

Author :
ISBN : UIUC:30112001077426
Genre : Aeronautics
File Size : 74.84 MB
Format : PDF, ePub, Docs
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Category: Aeronautics