Trend Analysis for Maintaining Correlation of Gas Turbine Engine Test Cells PDF Download
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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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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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ISBN:
Category :
Languages : en
Pages : 0
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Book Description
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
Publisher:
ISBN:
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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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: 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:
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Category : Aeronautics
Languages : en
Pages : 1102
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Category : Aeronautics
Languages : en
Pages : 1362
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ISBN:
Category : Aeronautics
Languages : en
Pages : 520
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Category : Mechanical engineering
Languages : en
Pages : 676
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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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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 per the five year re-affirmation requirement. This revision will update the document to reflect test cell instrumentation and hardware currently in use and available for use in post-overhaul gas turbine engine testing. Some of the advances in measurement systems and hardware are included in this update.
Author: S. Franco-Trigo
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ISBN:
Category :
Languages : en
Pages : 100
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