Overlapped grid disturbance domain updating method for aircraft multi-body separation simulation
A technology of multi-body separation and update method, which is applied in the field of overlapping grid disturbance domain update of aircraft multi-body separation simulation, which can solve the problems of "outliers" affecting convergence and interpolation affecting accuracy, and achieves the effect of improving computational efficiency.
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Embodiment 1
[0184] Example 1: figure 2 A case where there are two corresponding units for one unit is illustrated. The coordinates of point A, point B, point C, point D, point 1, and point 2 in the figure x A , x B , x C , x D , x 1 , x 2 is a known quantity, step S3-2 is responsible for determining the coordinates of the remaining points, namely x a , x b , x d , x e , x f . It can be seen from the figure that there is the following geometric relationship between the points:
[0185] (12)
[0186] The reasonable position of the split point can be determined by using the Lagrange multiplier method.
Embodiment 2
[0187] Example 2: image 3 The corresponding situation of the grid cells in the overlapping region of large flow gradients is illustrated. In the figure, the coordinates of the 13 grid points marked with letters are known, and the grid points have the following geometric relationship:
[0188] (13)
[0189] In the formula, the subscript "1" represents the grid coordinates before moving, and "2" represents the grid coordinates after moving. The new coordinates of the grid cells in the large flow gradient overlapping area can be determined by using the Lagrange multiplier method.
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