Efficient Creation of Overset Grid Hole Boundaries and Effects of Their Locations on Aerodynamic Loads
نویسندگان
چکیده
Recent developments on the automation of the X-rays approach to hole-cutting in overset grids is further improved. A fast method to compute an auxiliary wall-distance function used in providing a first estimate of the hole boundary location is introduced. Subsequent iterations lead to automatically-created hole boundaries with a spatially-variable offset from the minimum hole. For each hole boundary location, an averaged cell attribute measure over all fringe points is used to quantify the compatibility between the fringe points and their respective donor cells. The sensitivity of aerodynamic loads to different hole boundary locations and cell attribute compatibilities is investigated using four test cases: an isolated re-entry capsule, a two-rocket configuration, the AIAA 4th Drag Prediction Workshop Common Research Model (CRM), and the D8 “Double Bubble” subsonic aircraft. When best practices in hole boundary treatment are followed, only small variations in integrated loads and convergence rates are observed for different hole boundary locations.
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