串列式扇翼布局流动特性数值研究

发布时间：2019-07-12 16:00

【摘要】：扇翼能够通过前缘横流风扇的高速旋转对前方来流进行加速和重新整流。利用这一特点提出了一种串列式扇翼布局,其由一定间距和空间高度分布的前后双排或多排扇翼组成,并基于二维模型对该布局开展了流动数值模拟,分析得到了不同前后间距、高度差以及排数下串列式扇翼布局的升力和推力特性。结果表明,相对单个扇翼,在合适的设计参数下串列式扇翼可得到更大的单排平均升力和推力,其中间距一倍风扇直径的四排扇翼平均升力和推力分别提高了约10%和30%。基于扇翼附近流场分布和翼型上下表面压强分布,分析了引起升力和推力提升的原因。该研究可为未来设计具有更好低速大载荷特性的扇翼飞行器提供参考。
[Abstract]:The fan can accelerate and recalibrate the front flow through the high speed rotation of the leading edge crossflow fan. Based on this characteristic, a cascade fan wing layout is proposed, which is composed of front and rear double row or multi row fan wings with certain spacing and spatial height distribution. Based on the two dimensional model, the flow numerical simulation of the layout is carried out, and the lift and thrust characteristics of the cascade fan wing layout under different front and rear spacing, height difference and row number are obtained. The results show that compared with a single fan, the single row average lift and thrust of the series fan can be obtained under the appropriate design parameters, in which the average lift and thrust of the four row fan with a distance of twice the fan diameter are increased by about 10% and 30%, respectively. the results show that the average lift and thrust of the four row fan can be increased by about 10% and 30%, respectively. Based on the flow field distribution near the fan wing and the pressure distribution on the upper and lower surface of the airfoil, the causes of lift and thrust lifting are analyzed. This study can provide a reference for the future design of fan-wing aircraft with better low speed and high load characteristics.
【作者单位】：北京机电工程研究所;西北工业大学力学与土木建筑学院;
【分类号】：V211.41

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