Models postioned at various pitching angles of attack within a flow tunnel produced well-develpoed counter-rotating vortices along the ventrolateral keels.

• 水流槽中所放置的船模；当经受或上或下多角度的冲击；沿着其龙骨中央的外侧；即产生逆时针旋转的非常明显的旋涡.