船体的纵向尾涡

Hull Longitudinal Stern Vortices

本文对船体纵向尾涡产生的机理进行了物理描述。根据涡量场与物体相互作用的关系,讨论了纵向尾涡对伴流场的影响。对于纵向曲度变化缓慢的物体周围含纵向涡的一类工程问题,本文提出的广义的部分抛物型计算模型,可使计算工作量大大减小,因此用于近似计算这类工程问题是可行的。

This paper surveys physically the mechanism of the generation of the hull longituidinal stern vortices. In terms of the interrelation between the vorticity vertor and the moving body, the influence of the longitudinal stern vortex on the wake flow is discussed. A calculation model of a generalized partially-parabolic approximation is presented for the engineers case in which hull longitudinal curvature changes slowly and longitudinal vortices exist near the hull. As this calculation model needs less computation, it can be applied to the approximate calculation of engineering problems of this kind.