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Record 1 of 7899
Impact of aeroelasticity on propulsion and longitudinal flight dynamics of an air-breathing hypersonic vehicle
Author and Affiliation:
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)
Abstract: Many 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.
Publication Date: Jan 01, 1993
Document ID:
19930049937
(Acquired Dec 28, 1995)
Accession Number: 93A33934
Subject Category: LAUNCH VEHICLES AND SPACE VEHICLES
Report/Patent Number: AIAA PAPER 93-1367
Document Type: Conference Paper
Publication Information: 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; p. 628-637.; (SEE A93-33876)
Publisher Information: American Institute of Aeronautics and Astronautics, Washington, United States
Financial Sponsor: NASA; United States
Organization Source: NASA Langley Research Center; Hampton, VA, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AEROELASTICITY; AIR BREATHING ENGINES; DYNAMIC CHARACTERISTICS; FLIGHT CHARACTERISTICS; HYPERSONIC VEHICLES; LONGITUDINAL STABILITY; PROPULSION SYSTEM PERFORMANCE; AEROSPACE PLANES; ANGLE OF ATTACK; CONTROL SYSTEMS DESIGN; ELASTIC DEFORMATION
Imprint And Other Notes: 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 13-39), p. 628-637.
Availability Source: Other Sources
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