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网格展弦比的好坏严重地影响多重网格的效率。文中细致地处理了多重网格算法的细节，克服了网格展弦比的影响，发展了一种计算实用外形绕流的隐式多重网格解法，计算效率提高了５倍。
The aspect ratio of the grid seriously affects the efficiency of multiple grids. In this paper, the detail of the multi-grid algorithm is meticulously and overcome the influence of the aspect ratio of the grid. An implicit multi-grid solution to calculate the flow around the utility shape is developed. The computational efficiency is improved by 5 times.