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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 centerbody 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
19780061187
Document Type
Conference Paper
Authors
Wasserbauer, J. F. (NASA Lewis Research Center Cleveland, OH, United States)
Gerstenmaier, W. H. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
July 1, 1978
Subject Category
AERODYNAMICS
Report/Patent Number
AIAA PAPER 78-961
Meeting Information
Joint Propulsion Conference(Las Vegas, NV)
Distribution Limits
Public
Copyright
Other