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Inlet-engine matching for SCAR including application of a bicone variable geometry inletAirflow characteristics of variable cycle engines (VCE) designed for Mach 2.32 can have transonic airflow requirements as high as 1.6 times the cruise airflow. This is a formidable requirement for conventional, high performance, axisymmetric, translating centerbody mixed compression inlets. An alternate inlet is defined, where the second cone of a two cone center body collapses to the initial cone angle to provide a large off-design airflow capability, and incorporates modest centerbody translation to minimize spillage drag. Estimates of transonic spillage drag are competitive with those of conventional translating centerbody inlets. The inlet's cruise performance exhibits very low bleed requirements with good recovery and high angle of attack capability.
Document ID
19780019182
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wasserbauer, J. F. (NASA Lewis Research Center Cleveland, OH, United States)
Gerstenmaier, W. H. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1978
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA-TM-78955
E-9706
Meeting Information
Meeting: Propulsion Conf.
Location: Las Vegas, NV
Country: United States
Start Date: July 25, 1978
End Date: July 27, 1978
Sponsors: AIAA, SAE Engr.
Accession Number
78N27125
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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