Download Free Turbofan Engine Technology Evaluation System Book in PDF and EPUB Free Download. You can read online Turbofan Engine Technology Evaluation System and write the review.

"The User Guide includes a description of the general layout of the system, the general approach used in calculating gas properties throughout the engine simulation model, the recommended limitations and suggested constraints of the system, how the performance calculated by TRBOFN, the engine simulation program in this system, compares to SMOTE, an accepted standard turbofan engine simulation program, and discussion of the general conventions followed in developing the system. The Turbofan Engine Technology Evaluation System is intended to be a computer age 'back-of-the-envelope' calculation tool for use in evaluating the relative payoffs of competing gas turbine engine technologies. The system consists of four programs: SETUP - an interactive graphics program used to select and input design cycle parameters for the engine and the flight conditions at which performance is to be calculated. TRBOFN - the turbofan engine performance simulation program; ENCOM - an interactive engine sizing and comparison program that also allows selection of performance parameters for graphs and comparison of up to five engines' performance powering an airplane through an eleven leg fighter/ground attack mission. The bottom line output in this comparison is the minimum fraction of take-off gross weight that must be fuel for the airplane to complete the mission using each engine under consideration; and GRAPH - an interactive graphics program for the creation of publication quality graphs of almost any calculated parameter versus any other."--Abstract, report documention p.
The user guide includes a description of the general layout of the system, the general approach used in calculating gas properties throughout the engine simulation model, the recommended limitations and suggested constraints of the system, how the performance calculated by TRBOFN, the engine simulation program in this system, compares to SMOTE, an accepted standard turbofan engine simulation program, and discussion of the general conventions followed in developing the system. The Turbofan Engine Technology Evaluation System is intended to be a computer age back-of-the-envelope calculation tool for use in evaluating the relative payoffs of competing gas turbine engine technologies. The system consists of four programs: SETUP - an interactive graphics program used to select and input design cycle parameters for the engine and the flight conditions at which performance is to be calculated. TRBOFN - the turbofan engine performance simulation program; ENCOM - an interactive engine sizing and comparison program that also allows selection of performance parameters for graphs and comparison of up to five engines' performance powering an airplane through an eleven leg fighter/ground attack mission. The bottom line output in this comparison is the minimum fraction of take-off gross weight that must be fuel for the airplane to complete the mission using each engine under consideration; and GRAPH - an interactive graphics program for the creation of publication quality graphs of almost any calculated parameter versus any other.
Overview of engine control systems -- Engine modeling and simulation -- Model reduction and dynamic analysis -- Design of set-point controllers -- Design of transient and limit controllers -- Control system integration -- Advanced control concepts -- Engine monitoring and health management -- Integrated control and health monitoring -- Appendix A. Fundamentals of automatic control systems -- Appendix B. Gas turbine engine performance and operability.
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.
The design was based on the LTS-101 engine family for the core engine. A high bypass fan design (BPR=9.4) was incorporated to provide reduced fuel consumption for the design mission. All acoustic and pollutant emissions goals were achieved. A discussion of the preliminary design of a business jet suitable for the developed propulsion system is included. It is concluded that large engine technology can be successfully applied to small turbofans, and noise or pollutant levels need not be constraints for the design of future small general aviation turbofan engines.
This study documents the design and analysis of four types of advanced technology commercial transport airplane configurations (small, medium large and very large) with an assumed technology readiness date of 2010. These airplane configurations were used as a platform to evaluate the design concept and installed performance of advanced technology engines being developed under the NASA Ultra Efficient Engine Technology (UEET) program. Upon installation of the UEET engines onto the UEET advanced technology airframes, the small and medium airplanes both achieved an additional 16% increase in fuel efficiency when using GE advanced turbofan engines. The large airplane achieved an 18% increase in fuel efficiency when using the P&W geared fan engine. The very large airplane (i.e. BWB), also using P&W geared fan engines, only achieved an additional 16% that was attributed to a non-optimized airplane/engine combination.Daggett, David L. and Geiselhart, Karl A. (Technical Monitor)Langley Research CenterEXHAUST EMISSION; AIRCRAFT ENGINES; TECHNOLOGY ASSESSMENT; ENGINE DESIGN; DESIGN ANALYSIS; TURBOFAN ENGINES; TRANSPORT AIRCRAFT; SYSTEMS INTEGRATION; INSTALLING; COMMERCIAL AIRCRAFT; AIRFRAMES
To understand the operation of aircraft gas turbine engines, it is not enough to know the basic operation of a gas turbine. It is also necessary to understand the operation and the design of its auxiliary systems. This book fills that need by providing an introduction to the operating principles underlying systems of modern commercial turbofan engines and bringing readers up to date with the latest technology. It also offers a basic overview of the tubes, lines, and system components installed on a complex turbofan engine. Readers can follow detailed examples that describe engines from different manufacturers. The text is recommended for aircraft engineers and mechanics, aeronautical engineering students, and pilots.