An Integrated Framework for High-Fidelity Multi-Disciplinary Analysis of Rotorcraft

"An integrated framework is proposed for high-fidelity multi-disciplinary analysis of rotorcraft and tail surface aerodynamic and aeroelastic interactions. A novel multi-resolution technique is proposed for efficient capturing of the rotor wakes. A waveletcompression is used to store the flowfield as a multi-level representation in physical space. The primary solution progresses using a very coarse grid. Ideas borrowed from vorticity confinement are used to identify regions of concentrated vorticity. Theseregions are selectively solved recursively in the finer grid-levels and accurate information is injected into the coarse grids to correctly represent all vorticity.In Phase I, the novel wavelet compression algorithm will be developed as a stand-alone module. An innovative Runge-Kutta temporal update will be used to advance all grid levels independently. The feasibility of the wavelet compression module will beassessed using 1-D moving wave and extensive 2-D vortex-in-box simulations. The Phase I option will focus on developing efficient data structures to store and update the multi-resolution data. The proposed method is expected to provide orders-of-magnitudeleap over existing conventional wake capturing techniques. In Phase II, the wavelet compression methodology will be integrated with OVERFLOW into the Multi-Disciplinary Computing Environment (MDICE). The MDICE framework will enable the coupled codes tocapture the aerodynamic an