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针对跨声速后掠翼,三维鼓包串作为一种有效的减阻方式具有结构简单、高效及鲁棒性好等优点.利用全局优化算法探索了鼓包设计参数空间的整体特性,并对鼓包长度、三维鼓包展向设计参数对鼓包减阻效果的影响进行了研究,发现鼓包顶点位置和高度对阻力系数最敏感,三维鼓包的展向设计参数则对阻力系数不敏感,而鼓包长度和鼓包相对展长越长越有利于减阻.在此基础上开展了小后掠角自然层流机翼加3种不同类型鼓包串的优化研究,通过优化结果发现,增加优化后的三维鼓包串,可将小后掠角自然层流机翼阻力发散马赫数向后推移,并且鼓包平均长度和控制区越大,效果越好.三维鼓包串具有良好的局部控制特性,可用于局部较强激波的抑制.三维鼓包串对常规后掠翼波阻具有良好的控制效果,同时能够抑制激波诱导的机翼后缘气流分离.
Aiming at the transonic swept-back wing, the three-dimensional bulge array has the advantages of simple structure, high efficiency and robustness as an effective way to reduce drag.The global optimization algorithm is used to explore the overall characteristics of bulge design parameter space, The effect of design parameters on the drag reduction effect was studied. The results show that the position and height of the bulge tip are the most sensitive to the drag coefficient. The design parameters of the three-dimensional bulge are not sensitive to the drag coefficient, while the drum length and bulge relative development The longer the longer the more conducive to drag reduction.On the basis of this, we carried out the optimization research of three different types of drum strings with small sweepback natural laminar flow wing, and through the optimization results, we found that adding the optimized 3D drum string, Small sweep angle natural laminar flow wing resistance divergence Mach number backward, and the average length of the bulge and the control area is larger, the better. Three-dimensional bulge strings with good local control characteristics can be used for local strong shock suppression The three-dimensional drum string has good control effect on the conventional swept-back wave resistance and at the same time can suppress the shock induced air-wing separation on the trailing edge of the wing.