Boundary layer grid generation method based on heat conduction equation and leading edge propulsion method

Abstract

The invention discloses a boundary layer grid generation method based on a heat conduction equation and a leading edge advancing method, which belongs to the field of grid generation, and comprises the following steps: calculating a layer advancing normal direction of a leading edge point, and advancing a leading edge surface forwards, so as to shorten a layer advancing distance at a convex angular point and increase the layer advancing distance at a concave angular point; therefore, smoother leading edge surfaces can be generated at the convex corner points and the concave corner points; and meanwhile, calculating a normal mode of a front edge point layer, setting a threshold value, and when the mode of the front edge point is smaller than the threshold value, stopping advancing the front edge point and a corresponding front edge surface so as to naturally avoid intersection of the front edge surface and an adjacent grid, otherwise, continuing advancing. According to the method, the difficulty of generating the high-quality boundary layer grid is solved, so that the high-quality hybrid grid can be generated.

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