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研究了民用客机机翼设计中的环量分布设计规律。建立了一种以航程为系统级优化目标,融合气动与结构两个学科作为子学科的多学科NAND(Nested Analysis and Design)优化系统。通过合理的简化模型,有效地研究了机翼展向环量分布对结构重量、升阻比和航程这3方面的影响,找到了一种合理的适用于亚声速单通道民用客机的机翼环量分布。利用航程最远环量分布与椭圆形环量分布分别设计一副机翼并进行对比验证,结果表明:使用设计环量分布的机翼较椭圆形环量分布机翼增加了近5%的阻力,但由于结构减重使航程增加了近100km。在机翼设计过程中阻力最小对全机性能来讲可能并非全局最优,将气动压心合理内移会使全机经济性有所提高。
The design rule of ring volume distribution in civil aircraft wing design is studied. A multidisciplinary NAND (Nested Analysis and Design) optimization system with voyage as system-level optimization goal and aerodynamic and structural integration as a sub-discipline has been established. Through a reasonable simplified model, the effect of the span distribution of wing span on structural weight, lift-drag ratio and range is studied effectively, and a reasonable wing ring suitable for single-passenger sub-sonic passenger aircraft is found. Volume distribution. A wing was designed by using the farthest annular and elliptical annular distribution of the voyage and the comparison was made. The results show that the wing with the designed annular distribution increased nearly 5% more than the elliptical annular distribution , But due to structural weight loss to increase the range of nearly 100km. In the wing design process, the minimum resistance may not be the overall optimum for the whole machine performance. The rational internal movement of the pneumatic pressure will increase the whole machine’s economy.