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首页> 外文期刊>Journal of Fluid Science and Technology >Study on Effect of Petit Deltas at the Leading Edge of a Main Delta Wing on the Wing Characteristics
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Study on Effect of Petit Deltas at the Leading Edge of a Main Delta Wing on the Wing Characteristics

机译：主三角翼前缘的小三角翼对翼型特性的影响研究

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A delta wing with a sawtooth leading edge has an ability to improve its aerodynamic performance, which was suggested and confirmed by the authors' previous study ~([1]). It should not be practical, economical and easily controllable, because the sawtooth configuration part extends from the apex of the delta wing to the trailing edge. In this research a few petit delta parts beside the whole sawtooth leading edge was suggested on the basis of computational fluid dynamics (CFD) results for its optimization by changing their location on the leading edge, the number of petit deltas, and the configuration of the petit part. The aerodynamic characteristics of the suggested wing were investigated by experimental as well as numerical studies with the comparison to both the base delta wing without a sawtooth leading edge and the whole sawtooth delta wing. It was found that a series of three petit deltas with the modified rear configuration, which are located at the middle of the leading edge, gives the best performances at the attack angle for its taking off and landing. The reason for the best lift and such the complicated flow field as the primary leading edge separation vortex interacting with the flow from the petit deltas was examined in detail.
机译：作者之前的研究[[1]]提出并证实了具有锯齿形前缘的三角翼具有改善其空气动力学性能的能力。它不应该是实用的，经济的和易于控制的，因为锯齿状的构造部分从三角翼的顶点延伸到后缘。在这项研究中，根据计算流体动力学（CFD）结果，通过更改其在前沿的位置，小三角洲的数量和齿形的构型，对整个锯齿形前缘旁边的一些小三角洲部分提出了优化建议。小部分。通过实验和数值研究研究了建议机翼的空气动力学特性，并与没有锯齿形前缘的基础三角翼和整个锯齿形三角翼进行了比较。结果发现，位于前缘中间的一系列三个带有改进后部配置的小三角洲，在其起飞和着陆的迎角上均具有最佳性能。详细研究了最佳升力的原因以及复杂的流场（如主要的前缘分离涡与小三角洲的水流相互作用）。

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