帮忙看下这个压缩机的工作原理，谢谢~~

厂家的压缩机动画在国外，视频下不下来，看结构感觉是离心式压缩机。想问下大神这种压缩机的类型，以及详细的工作原理。压缩机是periflow的，隶属于Howden。下面是描述，但是没有说明中间的core部件是干啥的~~？？
A profiled impeller wheel revolves within an
annular channel, and the action imparts a
swirling helical flow to the process gas. The
helical route means the gas passes through
the blades several times.
The corkscrew movement has both tangential
and circulatory flow components. Tangential
flow tends to govern the volume of flow, and
the circulatory movement largely determines
the pressure, so each Periflow® compressor
can be custom designed to deliver the
precise performance required. In a single
revolution, the Periflow® process produces a
degree of compression equivalent to several
centrifugal compressor stages.

有可能是小透平

气流是怎么形成了螺旋形的，core的形状是怎样的、??

学习了

这个是不是把旋涡泵给放大了使用的，，

小型离心式压缩机