| Abstract | This report describes procedures for performing test cell correlations for turboprop/turboshaft and turbofan/turbojet gas turbine engine installations. Included in the report, are engine parameters specific to each type of correlation, definitions, reasons for performing and maintaining correlations and specifics about correlation reports. In addition, an example of an error analysis for a typical engine performance measurement (engine gross thrust), an example of a test cell correlation report, and a description of a typical test cell are included.
The performance of a gas turbine must be evaluated before entering service, especially following maintenance. A critical step in the evaluation of engine performance involves the correlation or calibration of the test facility. This correlation provides a necessary link back to the reference facility (usually located at the manufacturer) to ensure a consistent and accurate assessment of engine performance at the customer’s test facility. The correlation allows the true performance of the engine to be measured to ensure that the engine will meet the specification required for the safe operation of the aircraft. The correlation is a tool used for relating the performance of the engine measured at the customer’s test facility back to that measured at the engine manufacturer’s facility.
This document may be used as a guide for performing test cell correlations involving various engine/test cell configurations. Descriptions of the specific test parameters, data validation and analysis procedures covering most engine/test cell configurations are discussed. However, even though the document is applicable to most engine/test cell installations, it may not cover all of the specifics of some test configurations. |
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