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Author: EG-1E Gas Turbine Test Facilities and Equipment
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Languages : en
Pages : 0
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Book Description
This document discusses, in broad general terms, typical present instrumentation practice for post-overhaul gas turbine engine testing. Production engine testing and engine development work are outside the scope of this document as they will typically use many more channels of instrumentation, and in most cases will have requirements for measurements that are never made in post-overhaul testing, such as fan airflow measurements, or strain measurements on compressor blades.The specifications for each parameter to be measured, in terms of measurement range and measurement accuracy, are established by the engine manufacturers. Each test cell instrument system should meet or exceed those requirements. Furthermore, each instrument system should be recalibrated regularly, to ensure that it is still performing correctly. AIR5026 is being revised ahead of the five-year reaffirmation in order to include recommendations on steady-state data acquisition (3.2). This revision provides guidelines on data acquisition minimum sample rate, sample averaging time and the calculation of additional parameters based on steady-state data.
Author: EG-1E Gas Turbine Test Facilities and Equipment
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This document discusses, in broad general terms, typical present instrumentation practice for post-overhaul gas turbine engine testing. Production engine testing and engine development work are outside the scope of this document as they will typically use many more channels of instrumentation, and in most cases will have requirements for measurements that are never made in post-overhaul testing, such as fan airflow measurements, or strain measurements on compressor blades.The specifications for each parameter to be measured, in terms of measurement range and measurement accuracy, are established by the engine manufacturers. Each test cell instrument system should meet or exceed those requirements. Furthermore, each instrument system should be recalibrated regularly, to ensure that it is still performing correctly. AIR5026 is being revised ahead of the five-year reaffirmation in order to include recommendations on steady-state data acquisition (3.2). This revision provides guidelines on data acquisition minimum sample rate, sample averaging time and the calculation of additional parameters based on steady-state data.
Author: EG-1E Gas Turbine Test Facilities and Equipment
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ISBN:
Category :
Languages : en
Pages : 0
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This recommended practice considers many facets of testing which have a bearing on obtaining accurate, repeatable engine performance data. These are: TEST CELL CONFIGURATIONS TEST CELL INSTRUMENTATION ENGINE PERFORMANCE CORRECTION FACTORS TEST CELL EFFECTS INSTRUMENTATION CALIBRATION CORRELATION TEST PROGRAM.
Author:
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Languages : en
Pages :
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Author:
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Languages : en
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Author: EG-1E Gas Turbine Test Facilities and Equipment
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Category :
Languages : en
Pages : 0
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This paper describes a recommended practice and procedure for the correlation of test cells that are used for the performance testing of APU (auxiliary power unit) engines. Test cell correlation is performed to determine the effect of any given test cell enclosure and equipment on the performance of an engine relative to the baseline performance of that engine. The baseline performance is generally determined at the OEM designated test facility. The SAE EG-1E committee is composed of a cross section of representatives from OEMs, commercial users, repair stations and military depots. Based on the inputs from representatives of these various areas of interest, it was concluded that there was a need for a standardized procedure for correlating an APU gas turbine test cell. This paper represents the committee's best effort to satisfy the interest of all parties concerned and arrive at a valid realistic correlation procedure. It is the belief of the committee members that this document meets that objective.
Author: EG-1E Gas Turbine Test Facilities and Equipment
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Category :
Languages : en
Pages : 0
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This document describes a recommended practice and procedure for the trending of parameters to maintain the test cell correlation status. Trending is performed to monitor test cells for changes that can affect engine performance or the data acquired from engine tests. The FAA has issued Advisory Circular, AC43-207, on December 26, 2002 that recommends a 7-year re-correlation, trending or periodic checks. The FAA, AC43-207 bases their recommendation on the SAE Aerospace Recommended Practice (ARP) 741.This document describes a recommended practice and procedure for the trending of parameters to maintain the test cell correlation status as well as for documenting the trend analysis results. Trending is performed to monitor test cells for changes that can affect engine performance or the data acquired from engine tests. Over time the quality of the acceptance test data for an engine can be affected by the test cell environment. This could lead to unanticipated and expensive results of either accepting a poor performing engine or rejecting a good performing engine. The use of trending the data for engine acceptance can avoid such costly errors.
Author: EG-1E Gas Turbine Test Facilities and Equipment
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Category :
Languages : en
Pages : 0
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The configuration of a test facility that exists at the time when a correlation is being carried out should be "base lined" as a condition of correlation approval acceptance, and, be maintained during the time period that the respective correlation approval lasts. This defines test facility configuration control.This is due to the fact that a change in configuration may have the potential to change the established correlation factors and measured engine performance. If such a change occurs then this should be judged by the respective OEM's or designated correlation approval authorities Subject Matter Expert (SME). In some cases, this may involve consultation with the engine project customer or airworthiness authorities.The purpose of this paper is to recommend a means of identifying, recording, documenting and maintaining the configuration status of all correlations, including those where re-approval is achieved by using statistical trending methods rather than physical back-to-back type testing.This paper can be considered applicable to all types and standards of test facilies in the aero, marine and industrial gas turbine engine businesses. The FAA has issued Advisory Circular, AC43-207, on December 26, 2002 that recommends re-correlation, trending or periodic checks. The FAA, AC43-207 bases their recommendation on the SAE Aerospace recommended Practice (ARP) 741 rev. B (or latest revision).This paper describes a recommended practice and procedure for the configuration control requirements to maintain test cell correlation status. This is necessary to maintain performance measurement integrity, particular when correlation re-approval is achieved by statistical trending.
Author: EG-1E Gas Turbine Test Facilities and Equipment
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Languages : en
Pages : 0
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This SAE Aerospace Information Report (AIR) has been written for individuals associated with the ground-level testing of large and small gas turbine engines and particularly for those who might be interested in upgrading their existing or acquiring new test cell facilities. Revision to incorporate reference to recently published SAE Aerospace Information Report AIR6355.
Author: P. D. Smout
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Category : Airplanes
Languages : en
Pages :
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Author:
Publisher: Jeffrey Frank Jones
ISBN:
Category :
Languages : en
Pages : 372
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COURSE OVERVIEW: Fulfilling the Army's need for engines of simple design that are easy to operate and maintain, the gas turbine engine is used in all helicopters of Active Army and Reserve Components, and most of the fixed-wing aircraft to include the Light Air Cushioned Vehicle (LACV). We designed this subcourse to teach you theory and principles of the gas turbine engine and some of the basic army aircraft gas turbine engines used in our aircraft today. CHAPTERS OVERVIEW Gas turbine engines can be classified according to the type of compressor used, the path the air takes through the engine, and how the power produced is extracted or used. The chapter is limited to the fundamental concepts of the three major classes of turbine engines, each having the same principles of operation. Chapter 1 is divided into three sections; the first discusses the theory of turbine engines. The second section deals with principles of operation, and section III covers the major engine sections and their description. CHAPTER 2 introduces the fundamental systems and accessories of the gas turbine engine. Each one of these systems must be present to have an operating turbine engine. Section I describes the fuel system and related components that are necessary for proper fuel metering to the engine. The information in CHAPTER 3 is important to you because of its general applicability to gas turbine engines. The information covers the procedures used in testing, inspecting, maintaining, and storing gas turbine engines. Specific procedures used for a particular engine must be those given in the technical manual (TM) covering that engine The two sections of CHAPTER 4 discuss, in detail, the Lycoming T53 series gas turbine engine used in Army aircraft. Section I gives a general description of the T53, describes the engine's five sections, explains engine operation, compares models and specifications, and describes the engine's airflow path. The second section covers major engine assemblies and systems. CHAPTER 5 covers the Lycoming T55 gas turbine engine. Section I gives an operational description of the T55, covering the engine's five sections. Section II covers in detail each of the engine's sections and major systems. The SOLAR T62 auxiliary power unit (APU) is used in place of ground support equipment to start some helicopter engines. It is also used to operate the helicopter hydraulic and electrical systems when this aircraft is on the ground, to check their performance. The T62 is a component of both the CH- 47 and CH-54 helicopters -- part of them, not separate like the ground-support-equipment APU's. On the CH-54, the component is called the auxiliary powerplant rather than the auxiliary power unit, as it is on the CH-47. The two T62's differ slightly. CHAPTER 6 describes the T62 APU; explains its operation; discusses the reduction drive, accessory drive, combustion, and turbine assemblies; and describes the fuel, lubrication, and electrical systems. CHAPTER 7 describes the T63 series turboshaft engine, which is manufactured by the Allison Division of General Motors Corporation. The T63-A-5A is used to power the OH-6A, and the T63-A-700 is in the OH-58A light observation helicopter. Although the engine dash numbers are not the same for each of these, the engines are basically the same. As shown in figure 7.1, the engine consists of four major components: the compressor, accessory gearbox, combustor, and turbine sections. This chapter explains the major sections and related systems. The Pratt and Whitney T73-P-1 and T73-P-700 are the most powerful engines used in Army aircraft. Two of these engines are used to power the CH-54 flying crane helicopter. The T73 design differs in two ways from any of the engines covered previously. The airflow is axial through the engine; it does not make any reversing turns as the airflow of the previous engines did, and the power output shaft extends from the exhaust end. CHAPTER 8 describes and discusses the engine sections and systems. Constant reference to the illustrations in this chapter will help you understand the discussion. TABLE OF CONTENTS: 1 Theory and Principles of Gas Turbine Engines - 2 Major Engine Sections - 3 Systems and Accessories - 4 Testing, Inspection, Maintenance, and Storage Procedures - 5 Lycoming T53 - 6 Lycoming T55 - 7 Solar T62 Auxiliary Power Unit - 8 Allison T62, Pratt & Whitney T73 and T74, and the General Electric T700 - Examination. I
