Search Results

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APU Gas Turbine Engine Test Cell Correlation

2007-12-19

HISTORICAL

ARP5435

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.

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APU Gas Turbine Engine Test Cell Correlation

2023-05-19

CURRENT

ARP5435A

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 original equipment manufacturer (OEM) designated test facility. Although no original equipment manufacturer (OEM) documents are actually referenced, the experience and knowledge of several OEMs contributed to the development of this document. Each engine Manufacturer has their own practices relating to correlation and they will be used by those OEMs for the purpose of establishing certified test facilities.

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Configuration Control for Maintaining Correlation of Gas Turbine Engine Test Cells

2022-10-05

WIP

ARP6028B

The FAA has issued Advisory Circular, AC43-207, that recommends re-correlation, trending or period checks. The FAA, AC43-207 bases their recommendation on ARP741. 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, particularly when correlation approval is achieved by statistical trending. 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.

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Configuration Control for Maintaining Correlation of Gas Turbine Engine Test Cells

2020-10-21

CURRENT

ARP6028A

The FAA has issued Advisory Circular, AC43-207, that recommends re-correlation, trending or period checks. The FAA, AC43-207 bases their recommendation on ARP741. 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, particularly when correlation approval is achieved by statistical trending. 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.

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Configuration Control for Maintaining Correlation of Gas Turbine Engine Test Cells

2009-03-13

HISTORICAL

ARP6028

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.

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DESIGN CONSIDERATIONS FOR ENCLOSED TURBOFAN/TURBOJET ENGINE TEST CELLS

1995-10-01

HISTORICAL

AIR4869

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.

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Design Considerations for Enclosed Turbofan/Turbojet Engine Test Cells

2021-02-01

CURRENT

AIR4869B

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.

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Design Considerations for Enclosed Turboprop Engine Test Cells

2018-11-21

CURRENT

AIR5295A

This document is offered to provide state-of-the-art information about design factors that must be considered in the design of new or significantly modified engine test cells used to test propeller equipped turboprop engines in either QEC or bare engine configurations. The report does not address design considerations for test cells designed to test turboprop engines with dynamometer type load absorption devices because they are essentially tested as turboshaft engines. Design considerations for those test cells are presented in AIR4989, Reference 2.1.

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Design Considerations for Enclosed Turboprop Engine Test Cells

2007-11-15

HISTORICAL

AIR5295

This document is offered to provide state-of-the-art information about design factors that must be considered in the design of new or significantly modified engine test cells used to test propeller equipped turboprop engines in either QEC or bare engine configurations. The report does not address design considerations for test cells designed to test turboprop engines with dynamometer type load absorption devices because they are essentially tested as turboshaft engines. Design considerations for those test cells are presented in AIR4989, Reference 2.1.

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Design, Calibration, and Test Methods for Turbine Engine Icing Test Facilities

2023-05-19

CURRENT

AIR6189

This SAE Aerospace Information Report (AIR) provides descriptions of test procedures and established practices for the application, use, and administration of the conduct of icing testing for all types of turbine engines in conventional supercooled liquid (14 CFR Part 25 Appendix C) environmental conditions in ground test facilities (sea-level and altitude) for icing certification purposes.

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GAS TURBINE ENGINE FUEL NOZZLE TEST PROCEDURES

2007-11-15

HISTORICAL

ARP4865

The intent of this SAE Aerospace Recommended Practice (ARP) is to define and recommend to the Aerospace Industry standardized test procedures for establishing fuel nozzle operating performance including types of tests, controlled and measured parameters, and test configurations.

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GAS TURBINE ENGINE TEST CELL CORRELATION

1961-08-01

HISTORICAL

ARP741

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

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Gas Turbine Engine Fuel Nozzle Test Procedures

2013-12-10

CURRENT

ARP4865A

The intent of this SAE Aerospace Recommended Practice (ARP) is to define and recommend to the Aerospace Industry standardized test procedures for establishing fuel nozzle operating performance including types of tests, controlled and measured parameters, and test configurations.

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Gas Turbine Engine Test Facility Audit Process

2018-01-04

CURRENT

ARP6196

This SAE Aerospace Recommended Practice provides recommendations for: the audit process in general; a list of specific areas of attention to be audited; maintaining the test facility in such a manner that it meets audit requirements.

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Modeling Techniques for Jet Engine Test Cell Aerodynamics

1999-05-01

HISTORICAL

AIR4827

This SAE Aerospace Information Report (AIR) has been written for individuals associated with ground level testing of turbofan and turbojet engines and particularly for those who might be interested in investigating the performance characteristics of a new test cell design or of proposed modifications to an existing test cell by means of a scale model test.

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Test Cell Analytical Thrust Correction

2012-11-08

HISTORICAL

AIR5436

This document describes a method to correct engine thrust, measured in an indoor test cell, for the aerodynamic effects caused by the secondary airflow induced in the test cell by the engine operating in an enclosed environment in close proximity to an exhaust duct. While it is not recommended to be used to replace test cell correlation, it does provide a means to verify an existing thrust correlation factor.

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Test Cell Analytical Thrust Correction

2019-07-02

CURRENT

AIR5436A

This document describes a method to correct engine thrust, measured in an indoor test cell, for the aerodynamic effects caused by the secondary airflow induced in the test cell by the engine operating in an enclosed environment in close proximity to an exhaust duct. While it is not recommended to be used to replace test cell correlation, it does provide a means to verify an existing thrust correlation factor.

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Test Cell Instrumentation

2020-10-21

CURRENT

AIR5026B

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.

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Test Cell Mass Fuel Flow Measurement Using Coriolis Flow Meters

2017-06-14

CURRENT

AIR6202

The scope of this information report applies to the steady state measurement of direct mass fuel flow in gas turbine engine test cells. A measurement accuracy, and hence uncertainty of between ±0.1 to ±0.2% of value is believed to be achievable for liquid flow applications with some meter models/installations. Whilst capable of general transient measurement in 50 to 100 Hz region, this type of fuel meter is not capable of rapid transient measurement (in 100 to 250 Hz region). It is also not currently considered suitable for "in flight" fuel flow measurement.

Standard

Test Cell Mass Fuel Flow Measurement Using Coriolis Flow Meters

2022-10-05

WIP

AIR6202A

The scope of this information report applies to the steady state measurement of direct mass fuel flow in gas turbine engine test cells. A measurement accuracy, and hence uncertainty of between ±0.1 to ±0.2% of value is believed to be achievable for liquid flow applications with some meter models/installations.

Whilst capable of general transient measurement in 50 to 100 Hz region, this type of fuel meter is not capable of rapid transient measurement (in 100 to 250 Hz region). It is also not currently considered suitable for "in flight" fuel flow measurement.