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Aerodynamic performance of scarf inletsA scarf inlet is characterized by having a longer lower lip than upper lip leading to both aerodynamic and acoustic advantages. Aerodynamically, a scarf inlet has higher angle of attack capability and is less likely to ingest foreign objects while the aircraft is on the ground. Acoustically, a scarf inlet provides for reduced inlet radiated noise levels below the engine as a result of upward reflection and refraction of inlet radiated noise. Results of a wind tunnel test program are presented which illustrate the aerodynamic performance of two different scarf inlet designs. Based on these results, scarf inlet performance is summarized in a way to illustrate the advantages and limitations of a scarf inlet compared to an axisymmetric inlet.
Document ID
19790006827
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Abbott, J. M. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1979
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-79055
E-9865
Report Number: NASA-TM-79055
Report Number: E-9865
Meeting Information
Meeting: Aerospace Sci. Meeting
Location: New Orleans, LA
Country: United States
Start Date: January 15, 1979
End Date: January 17, 1979
Sponsors: AIAA
Accession Number
79N14998
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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