The first normal stress of viscoelastic polymer solution increases with the increase of Weissenberg number, the closer the wall of the bellows from, the greater the first normal stress and the greater the effect of Weissenberg number on the first normal stress; 黏弹性聚合物的第一法向应力随威森伯格数(We)的增大而增大,且越靠近壁面处,第一法向应力越大,受We的影响越大;