Gas Turbine Engine Performance Presentation and Nomenclature for Digital Computers Using Object-Oriented Programming

2005 ◽  
Author(s):  
Keyword(s):  
Gas Turbine ◽  
Engine Performance ◽  
Object Oriented ◽  
Gas Turbine Engine ◽  
Object Oriented Programming ◽  
Turbine Engine ◽  
Digital Computers

scholarly journals An Object-Oriented Approach to Gas Turbine Performance Computation

1996 ◽  
Author(s):  
Peng Yip Ho ◽  
Poh Seng Ng
Keyword(s):  
Gas Turbine ◽  
Engine Performance ◽  
Object Oriented ◽  
Object Oriented Programming ◽  
Data Types ◽  
Turbofan Engine ◽  
Turbine Engine ◽  
Source Codes ◽  
Flexible Designs ◽  
Amount Of Knowledge

This paper aims to introduce Object-Oriented Programming (OOP) concepts in the context of gas turbine engine performance computations. Objects are collections of data and functions that represents useful elements in an application. They are a means of extending the standard programming language to endow it with data types that are natural metaphors for both physical objects and abstract entities within the application program. Objects are valuable in designing and implementing software because they hide complexity, reducing the amount of knowledge required about any objects in order to use it. These properties also allow objects to be modified or replaced without affecting other areas of the application. Thus, this results in flexible designs and increased productivity by providing reusable software without sacrificing flexibility. The fundamental OOP concepts such as encapsulation, inheritance, and polymorphism are explained and exemplified by source codes from a turbofan engine performance computation software. The advantages of these over traditional programming paradigms are highlighted. The resulting program source code is readable, self-documenting, robust, and highly modular. Furthermore, the software for a turbofan engine is essentially a collection of objects that forms the basic framework for modelling all conceivable forms of gas turbine engines.

Simple Instrumentation Rake Designs for Gas Turbine Engine Testing

1996 ◽  
Author(s):  
Peter D. Smout ◽  
Steven C. Cook
Keyword(s):  
Gas Turbine ◽  
Mechanical Damage ◽  
Engine Performance ◽  
Leading Edge ◽  
Gas Turbine Engine ◽  
Calibration Data ◽  
Turbine Engine ◽  
Industry Standard ◽  
Repair Costs ◽  
Engine Testing

The determination of gas turbine engine performance relies heavily on intrusive rakes of pilot tubes and thermocouples for gas path pressure and temperature measurement. For over forty years, Kiel-shrouds mounted on the rake body leading edge have been used as the industry standard to de-sensitise the instrument to variations in flow incidence and velocity. This results in a complex rake design which is expensive to manufacture, susceptible to mechanical damage, and difficult to repair. This paper describes an exercise aimed at radically reducing rake manufacture and repair costs. A novel ’common cavity rake’ (CCR) design is presented where the pressure and/or temperature sensors are housed in a single slot let into the rake leading edge. Aerodynamic calibration data is included to show that the performance of the CCR design under uniform flow conditions and in an imposed total pressure gradient is equivalent to that of a conventional Kiel-shrouded rake.

Training Future Gas Turbine Performance Engineers

2007 ◽  
Author(s):  
V. Pachidis ◽  
P. Pilidis ◽  
I. Li
Keyword(s):  
Gas Turbine ◽  
Thermal Power ◽  
Engine Performance ◽  
Gas Turbine Engine ◽  
Performance Simulation ◽  
Turbine Engine ◽  
Turbine Performance ◽  
Auxiliary Power ◽  
Engine Testing ◽  
The Uk

The performance analysis of modern gas turbine engine systems has led industry to the development of sophisticated gas turbine performance simulation tools and the utilization of skilled operators who must possess the ability to balance environmental, performance and economic requirements. Academic institutions, in their training of potential gas turbine performance engineers have to be able to meet these new challenges, at least at a postgraduate level. This paper describes in detail the “Gas Turbine Performance Simulation” module of the “Thermal Power” MSc course at Cranfield University in the UK, and particularly its practical content. This covers a laboratory test of a small Auxiliary Power Unit (APU) gas turbine engine, the simulation of the ‘clean’ engine performance using a sophisticated gas turbine performance simulation tool, as well as the simulation of the degraded performance of the engine. Through this exercise students are expected to gain a basic understanding of compressor and turbine operation, gain experience in gas turbine engine testing and test data collection and assessment, develop a clear, analytical approach to gas turbine performance simulation issues, improve their technical communication skills and finally gain experience in writing a proper technical report.

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