Nonlinear Aerodynamic ROM-Structural ROM Methodology for Inflatable Aeroelasticity in Hypersonic Atmospheric Entry
Small Business Information
ZONA Technology, Inc.
9489 E. Ironwood Square Drive, Scottsdale, AZ, 85258
AbstractZONA Technology proposes to develop an innovative nonlinear structural reduced order model (ROM) - nonlinear aerodynamic ROM methodology for the inflatable aeroelasticity of a clamped modeled ballute system. The proposed ROM-ROM methodology tightly couples a nonlinear-FEM based structural ROM with CFD based neural-net aerodynamic ROM to achieve a high computational efficiency. Indeed, the computing time for a typical wing flutter/LCO analysis is reduced from hours (direct) to minutes (ROM-ROM). The structural ROM enables a seamless time-integration of the ROM-ROM and could be coupled with other aerodynamic ROM methods like Volterra or POD. A time-accurate GasKinetic BGK method (BGKX) is adopted to generate the aerodynamic ROM for rarefied hypersonic unsteady aerodynamics/aeroelasticity applications to a ballute in atmospheric entry. With a natural boundary condition, BGKX is superior to continuum methods for unsteady flow simulations, and unified in transition to continuum flow regimes covering the peak dynamic pressure range in Earth/Martian entries. It can provide flow pressures and heat flux in one step. In Phase I, we will consider both a 2D membrane-on-wedge system and a modeled ballute system and investigate their static aeroelasticity as well as the feasibility/efficiency of the ROM-ROM approach for their dynamic aeroelastic responses (flutter/LCO). These capabilities are necessary for the development of inflatable aeroelasticity in NASA space program.
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