Slotted, natural-laminar-flow (SNLF) airfoils are a novel aerodynamic concept that enable significant performance improvements over conventional, single-element NLF airfoils. The S207, SNLF airfoil has been designed using requirements derived from a transonic, truss-braced wing commercial aircraft configuration. The airfoil is designed for a cruise Reynolds number of $13.2\times {10}^6$ and it exhibits a drag divergence Mach number exceeding 0.71. At these conditions, low drag is predicted to occur between lift coefficients of 0.40 and 0.79. The S207 airfoil exhibits a range-based figure of merit nearly triple that of a turbulent airfoil representative of modern commercial transport aircraft. Slotted configurations also have benefits for low-speed, high-lift conditions representative of approach. The S207 airfoil exhibits a low-speed, maximum lift coefficient in excess of 2.1, and is limited by compressibility effects around the leading edge. Incorporation of this airfoil onto a transonic, truss-braced wing configuration shows strong potential for meeting mid- and far-term goals for reducing aircraft fuel/energy consumption.

开槽的自然层流（SNLF）机翼是一种新颖的空气动力学概念，与传统的单元素NLF机翼相比，能够显着提高性能。SNLF机翼S207是根据跨音速，桁架支撑机翼商用飞机配置得出的要求进行设计的。机翼是为雷诺号巡洋舰设计的$13.2\times {10}^6$并且它表现出的阻力发散马赫数超过0.71。在这些条件下，预计在阻力系数0.40和0.79之间会发生低阻力。S207机翼的航程品质因数是现代商用运输机代表的湍流机翼的近三倍。开槽式配置还有利于代表进近的低速，高升情况。S207机翼的低速最大升力系数超过2.1，并且受到前缘周围的压缩效应的限制。将该机翼结合到跨音速，桁架支撑的机翼构型上，显示出实现降低飞机燃料/能源消耗的中长期目标的强大潜力。