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开展层流超临界翼型稳健设计研究。针对传统的基于蒙特卡洛不确定分析方法的稳健设计系统计算量巨大、效率低下等问题,引入了混沌多项式方法,建立了新型稳健设计系统。采用RAE2822翼型稳健设计验证了设计系统的可靠性、高效性。结果表明,混沌多项式方法在保证设计精度的基础上设计效率提高了10倍左右。采用该系统进行了层流超临界翼型稳健设计研究,设计的结果表明:对于层流超临界翼型设计需要兼顾层流区长度、阻力发散特性;基于多目标稳健设计方法可以权衡设计点特性和阻力的波动特性;设计后翼型与原始翼型相比,设计点阻力减小了10cunts,阻力发散马赫数提高了0.01,在整个马赫数范围内维持了低的阻力特性。
Steady flow design of laminar supercritical airfoil. Aiming at the problems of traditional Monte-Carlo method for uncertain design, such as large computational complexity and low efficiency, the chaotic polynomial method is introduced and a new robust design system is established. The RAE2822 airfoil robust design verified the reliability and efficiency of the design system. The results show that the design efficiency of chaos polynomial method is about 10 times higher on the basis of ensuring design accuracy. The design of the laminar-flow supercritical airfoil is carried out with this system. The design results show that the design of the laminar flow supercritical airfoil needs both the length of the laminar flow and the divergence of resistance. The multi-objective robust design method can weigh the design point characteristics And the resistance fluctuation characteristics. Compared with the original airfoil, the design airfoil reduces the design point resistance by 10cunts, the resistance divergence Mach number by 0.01, and maintains the low resistance characteristic throughout the Mach number range.