前缘凹凸三维平板舵水动力性能研究
首发时间:2012-01-06
摘要:该文基于RANS方法研究了三维机翼前缘凹凸结节对机翼水动力性能的影响。首先对剖面形状为NACA0020的三维平板舵进行数值模拟,在某一雷诺数下,分析了三维平板舵在不同攻角下的水动力性能,得出了三维平板舵的失速角。在此基础上改变其前缘形状,布置凹凸结节,计算其水动力性能,在相同雷诺数和攻角下与无结节平板舵的水动力性能进行比较,分析了凹凸结节对三维平板舵的水动力性能的影响,并得出了在同一雷诺数下,凹凸流线舵的失速角后移了3 ,最大升力系数提高了11.92%这一有利结论,为前缘凹凸结节机翼的优化设计奠定了基础。
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Hydrodynamic performance of leading-edge tubercle three-dimensional airfoil
Abstract:Based on RANS method, this paper studies leading-edge tubercle three-dimensional airfoil, which has effect on hydrodynamic performance of three-dimensional airfoil. Numerical simulation is used to carry out on sectional configuration of NACA0020. Hydrodynamic performance of NACA0020 airfoil is analyzed under different angle of attacks at a Reynolds number. The shape of leading-edge is changed. Tubercle is laid out. Hydrodynamic performance of leading-edge tubercle three-dimensional airfoil is calculated, which is compared with the hydrodynamic performance of NACA0020 airfoil .The tubercles is analyzed. The angle of stall of leading-edge tubercle three-dimensional airfoil is delayed 3 than NACA0020,and the lift coefficient is increased 11.92%. The results had laid the foundation for optimization design of leading-edge tubercle three-dimensional airfoil.
Keywords: leading-edge tubercle three-dimensional airfoil hydrodynamic performance angle of stall
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