There is an useless energy consumption in the forcedvortex.
强制涡内存在无益的能量耗损；
2
In the separation space, the outer vortex can be approximately regarded as quasi-free vortex and inner vortex as quasi-forcedvortex.
分离空间内时均流场是外侧准自由涡与内侧准强制涡的典型结构。
3
The formation mechanism and properties of forcedvortex in a hydrocyclone and its influence on the performance of the cyclone are studied systematically and thoroughly in this paper.