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针对高升力装置构型模型结构复杂、流场变化剧烈等特点,本文采用分区拼接网格的思想分别按照流场和结构拓扑特点对高升力装置进行了网格分区。在分区的基础上逐块生成网格,减小了增升装置网格的生成难度,提高了网格质量,减少了网格数目。首先,研究了高升力装置的分区策略及流场特点;接着以MD30P-30N多段翼型为研究算例研究了网格比例和插值方法对计算结果的影响。经过分析对比可知:外部区域与近壁区域之间的比例不宜小于1:5;内部域网格比例不宜超过1:1.8,最好保持在1:1左右;计算中应该采用高阶精度插值以保证计算精度。采用某四段翼型进行了验证;最后采用NASA标准高升力装置进行了三维高升力装置流场数值模拟并与相应风洞实验数据及对接网格计算结果进行了比较与分析,验证了拼接网格技术的高效性与可靠性。同时分析研究了绕三维增升装置的流动及其周围复杂的粘性流动现象。
In view of the complex structure and the drastic changes of the flow field in the configuration model of the high-lift device, this paper uses the idea of zoned splicing grid to mesh the high-lift device according to the characteristics of flow field and structure. Generating grids block by block on the basis of zoning reduces the difficulty of generating grids of lifting devices, improves grid quality and reduces the number of grids. Firstly, the zoning strategy and flow field characteristics of the high-lift device are studied. Then, the influence of the grid proportion and the interpolation method on the calculation results is studied with the MD30P-30N multi-section airfoil as an example. After analysis and comparison, the ratio between the outer area and the near wall area should not be less than 1: 5; the ratio of the inner area grid should not exceed 1: 1.8, preferably about 1: 1; high-order precision interpolation should be used in the calculation Ensure the accuracy of calculation. Finally, the numerical simulation of the flow field of a three-dimensional high-lift device is carried out by NASA standard high-lift device and compared with the corresponding wind tunnel experimental data and the docking grid calculation results. The results show that the splicing network Grid technology efficiency and reliability. At the same time, the flow around the three-dimensional lifting device and the complex viscous flow around it were analyzed.