To research the support mechanism and stiffness of axial film in rotary pressure exchanger (RPE) which is widely employed in Sea-water Reverse Osmosis (SWRO) system, a 3-D model, which includes circumferential film, axial film and lubrication groove, was built to stimulate the pressure field in clearance based on Fluent software. It is proved that the support capacity of axial film depends on hydrostatic effect, and the circumferential film effect on support capacity of axial film cannot be ignored. The effect of circumferential film on support capacity is reflected in the influence of the average pressure of lubrication groove. The stiffness of axial film is larger when the axial clearance is smaller than the radial clearance. With the increasing of radial clearance, the stiffness of axial film declines, which is more obvious in a little clearance of axial film. The axial force of axial film has a linear relation with the inlet pressure of the RPE, and its stiffness is much larger when the inlet pressure increases.
ZHAO Fei, YANG Shuai, WU Jun, WU Chun-jie, WU Da-zhuan. Analysis on support mechanism of the axial film in Rotary Pressure Exchanger based on Fluent. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(8): 1528-1533.
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