When the ratio of impact height to the nozzle width does not change, the nozzle width has negligible influence on the evolvement of secondary eddy.

当冲击高度与喷嘴宽度的比值取值相同时，喷嘴宽度的大小对壁面二次生成涡的演变特性基本上没有影响。

Meanwhile, some problems occur, one of resolvent is to add nozzle width.

但同时出现一些问题, 解决的办法之一就是增大喷嘴宽度.