Development of Harmonic Panel Methods for Aeroelastic Applications to Elastic Bodies and Body-Fin Combinations in Supersonic Flow

摘要

Recent development of several unsteady supersonic methods for computations of airloads for elastic bodies of revolution, asymmetric bodies and body wing configurations are reported. These methods include the Harmonic Potential Panel (HPP) method, the Bundle Triplet Method (BTM) and the combined method of BTM and the Harmonic Gradient Method (HGM) for body wing combinations. All methods are based on the generic Harmonic Gradient (H-G) model, which is essential in providing accurate solutions in the full frequency domain and the low Mach number range. Extensive comparisons of computed results obtained from these methods show good correlations with existing data. Comparison examples range from simple cones and ogive bodies to Saturn SA-1 configuration, to the cylindrical panel membrance and to the NACA wing-body combinations. Cases computed yield steady and unsteady pressures, generalized forces, stability derivatives, aerodynamic dampings and divergence and flutter boundaries for these configurations. The developed methods have been validated with existing theories or measured data. For supersonic aeroelastic analysis, these methods yield results that are accurate and cost-effective, thus rendering them very favorable for technology transfer and industry applications. Keywords: Unsteady aerodynamics, Supersonic flow, Aeroelasticity. (mjm)