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Numerical analysis of propeller induced ground vortices by actuator disk model

机译:螺旋桨诱导地涡的致动盘数值分析。

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摘要

AbstractDuring the ground operation of aircraft, the interaction between the propulsor-induced flow field and the ground may lead to the generation of ground vortices. Utilizing numerical approaches, the source of vorticity entering ground vortices is investigated. The results show that the production of wall-parallel components of vorticity has a strong contribution from the wall-parallel components of the pressure gradient on the wall, which is generated by the action of the propulsor. This mechanism is a supplementation for the vorticity transported from the far-field boundary layer, which has been assumed the main vorticity source in a number of previous publications. Furthermore, the quantitative prediction of the occurrence of ground vortices is performed from the numerical results. As the distance of the propeller form the ground decreases, and as the thrust of the propeller increases, ground vortices are generated from the ground and enter the propeller. In addition, the vortices which exist near the ground but does not enter the propeller plane are observed and visualized by three-dimensional data.
机译:摘要在飞机的地面操作过程中,推进剂引起的流场与地面之间的相互作用可能导致地面涡旋的产生。利用数值方法,研究了进入地面涡旋的涡旋源。结果表明,涡流的平行壁分量的产生对壁上压力梯度的平行壁分量的贡献很大,这是由推进器的作用产生的。这种机制是对从远场边界层传输来的涡旋的补充,在以前的许多出版物中,假定它是主要的涡旋源。此外,根据数值结果对地面涡旋的发生进行定量预测。随着螺旋桨距地面的距离减小,并且随着螺旋桨推力的增加,地面涡流从地面产生并进入螺旋桨。另外,通过三维数据观察并可视化存在于地面附近但未进入螺旋桨平面的旋涡。

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