摘要: |
Within the Space Launch System (SLS) program, the Kestrel flow solver has be- come the tool of choice for conducting aerodynamic simulations for the low-speed liftoff and transition flight regimes. Despite having used Kestrel to develop transition regime lineload databases for four SLS configurations, the uncertainty in these databases has yet to be established, primarily due to the large computational re- sources required for each simulation and the large number of simulations required to construct the uncertainty bounds. En route to formulating such bounds, an assessment of the sensitivity of the simulations to variations in the settings of the flow solver input parameters is essential. Accordingly, a comprehensive study of perturbations to the input settings, for a single flow condition, has been conducted; results were processed with the goals of pinpointing the regions of the flow most sensitive to the various input settings, quantifying input setting effects on key aerodynamic characteristics, and providing a first look at the magnitude of the uncertainty in the lineloads. |