An integrated analytical aeropropulsive/aeroelastic model for the dynamic analysis of hypersonic vehiclesThe development of an approach to the determination of the dynamic characteristics of hypersonic vehicles which is intentionally generic and basic is given. The approach involves a 2D hypersonic aerodynamic analysis utilizing Newtonian theory, coupled with a 1D aero/thermoanalysis of the flow in a scramjet-type propulsion system. In addition, the airframe is considered to be elastic, and the structural dynamics are characterized in terms of a simple lumped-mass model of the invacuo vibration modes. The vibration modes are coupled to the rigid-body modes through the aero/propulsive forces acting on the structure. The control effectors considered on a generic study configuration include aerodynamic pitch-control surfaces, as well as engine fuel flow and diffuser area ratio. The study configuration is shown to be highly statically unstable in pitch, and to exhibit strong airframe/engine/elastic coupling in the aeroelastic and attitude dynamics, as well as the engine responses.
Document ID
19920074410
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chavez, Frank R. (NASA Langley Research Center Hampton, VA, United States)
Schmidt, David K. (Arizona State University Tempe, United States)