SAE AIR 5686:2017-07-31

This Aerospace Information Report (AIR) addresses the subject of aircraft inlet-swirl distortion. A structured methodology for characterizing steady-state swirl distortion in terms of swirl descriptors and for correlating the swirl descriptors with loss in stability pressure ratio is presented. The methodology is to be considered in conjunction with other SAE inlet distortion methodologies. In particular, the combined effects of swirl and total-pressure distortion on stability margin are considered. However, dynamic swirl, i.e., time-variant swirl, is not considered. The implementation of the swirl assessment methodology is shown through both computational and experimental examples. Different types of swirl distortion encountered in various engine installations and operations are described, and case studies which highlight the impact of swirl on engine stability are provided. Supplemental material is included in the appendices.

Author	SAE
Editor	SAE
Document type	Standard
Format	File
Cancellation date	2017-07-31
Confirmation date	2017-07-31
ICS	49.020 : Aircraft and space vehicles in
Number of pages	110
Replaced by	SAE AIR 5686 (2017-07-31)
Set	AEROPAKS10U-10
Year	2017
Document history	SAE AIR 5686 (2017-07-31)
Country	USA
Keyword	SAE 5686;SAE AIR5686;SAE AIR5686;SAE AIR 5686