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Impact of aeroelasticity on propulsion and longitudinal flight dynamics of an air-breathing hypersonic vehicleMany air-breathing hypersonic aerospacecraft design concepts incorporate an elongated fuselage forebody acting as the aerodynamic compression surface for a hypersonic combustion module, or scram jet. This highly integrated design approach creates the potential for an unprecedented form of aero-propulsive-elastic interaction in which deflections of the vehicle fuselage give rise to propulsion transients, producing force and moment variations that may adversely impact the rigid body flight dynamics and/or further excite the fuselage bending modes. To investigate the potential for such interactions, a math model was developed which included the longitudinal flight dynamics, propulsion system, and first seven elastic modes of a hypersonic air-breathing vehicle. Perturbation time histories from a simulation incorporating this math model are presented that quantify the propulsive force and moment variations resulting from aeroelastic vehicle deflections. Root locus plots are presented to illustrate the effect of feeding the propulsive perturbations back into the aeroelastic model. A concluding section summarizes the implications of the observed effects for highly integrated hypersonic air-breathing vehicle concepts.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Raney, David L.
(NASA Langley Research Center Hampton, VA, United States)
Mcminn, John D.
(NASA Langley Research Center Hampton, VA, United States)
Pototzky, Anthony S.
(Lockheed Engineering and Sciences Co. Hampton, VA, United States)
Wooley, Christine L.
(Cincinnati Univ. OH, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: In: AIAA(ASME)ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 34th and AIAA/ASME Adaptive Structures Forum, La Jolla, CA, Apr. 19-22, 1993, Technical Papers. Pt. 1 (A93-33876 1
Publisher: American Institute of Aeronautics and Astronautics
Subject Category
Launch Vehicles And Space Vehicles
Report/Patent Number
AIAA PAPER 93-1367
Accession Number
Distribution Limits

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