Speaker
Mr
Qing Li
(IPC)
Description
In helium refrigeration systems, high-speed centrifugal cold compressors are utilized to pump gaseous helium from a saturated liquid helium tank at low temperature and pressure to produce superfluid helium or sub-cooled helium. Stall and surge are common unsteady flow phenomena in centrifugal cold compressors severely limiting the operation range and the impact efficiency reliability. In order to obtain the installed range of cold compressor, unsteady flow at lower inlet pressures and higher speeds are investigated with CFD. It provides a numerical foundation of analysing the effect of an unsteady flow field and reducing the flow loss, and it is helpful for the further study and able to instruct the designing.
Author
Mr
Qing Li
(IPC)
