SAE Standards Works
S-16 Turbine Engine Inlet Flow Distortion Committee
AIR5867 - A Current Assessment of the Inlet/Engine Temperature Distortion Problem
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Michael J. Kirby
A Current Assessment of the Inlet/Engine Temperature Distortion Problem
This report revises SAE ARD 50015 document to the AIR format. This report, as was the original, is intended to be a compliment to ARP1420B and AIR1419 documents issued by the SAE S-16 Committee on spatial total-pressure distortion. These previous documents addressed only total-pressure distortion and excluded temperature distortion. The subject of inlet temperature distortion is addressed in this report with some background and identification of the problem area. The status of past efforts is reviewed and an attempt is made to define where we are today. Deficiencies, voids, and limitations in knowledge and test techniques for temperature distortion are identified. Suggested approaches to fill these voids and a proposed temperature distortion methodology are presented. Successful techniques, employed to date, are reviewed and recommendations for future research work are indicated.
Due to the needs of the industry, this document has been upgraded to an AIR (Aerospace Information Report) from an ARD (Aerospace Research Document) status and was formerly catalogued as ARD50015. Most of the report is unchanged since the material is as useful now as it was when first published in 1991. A few paragraphs have been updated to reflect knowledge gained on recent aircraft programs. Other changes reflect consistency with more recently adopted definitions, and minor editorial and typographical corrections. Attempts were also made to update quality and timeliness of the original figures and tables. However, because it was not possible to retrieve some of the original material the existing relative figures and tables were kept resulting in a varying appearance throughout this revision. As applications for turbine engines have become more sophisticated and the operating conditions more severe, the SAE S-16 Turbine Engine Inlet Flow Distortion Committee has recognized the need for guidelines and procedures that would address inlet flow total-temperature distortion in a manner similar to that accomplished for inlet flow total-pressure distortion which resulted in the SAE documents ARP142OB and A1R1419. This document brings together information and ideas which are required to address temperature distortion problems.
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