CFD-predicted rotordynamic characteristics of a high temperature sodium liquid seal
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School of Mechanical and Powder Engineering, Harbin University of Science and Technology, Harbin, China
Chongqing Pump Industry, Chongqing, China
Harbin Engineering University, Harbin, China
Harbin Institute of Technology, Harbin, China
Pingwei Chen   

School of Mechanical and Powder Engineering, Harbin University of Science and Technology, 150080, Harbin, China
Submission date: 2022-03-18
Final revision date: 2022-05-05
Acceptance date: 2022-05-08
Online publication date: 2022-06-10
Publication date: 2022-07-30
Journal of Theoretical and Applied Mechanics 2022;60(3):347–360
Rotordynamic characteristics of a high temperature sodium liquid (HTSL) seal were studied in this paper by using CFD software. Compared with the water liquid seal, the HTSL seal has a larger leakage flow rate and a lower drag power loss. The HTSL seal has a larger direct stiffness coefficient and the effective stiffness coefficient Keff is also larger than the water liquid seal, which means the HTSL seal has a better stiffness capacity. The HTSL seal possesses a positive effective damping coefficient Ceff in the whole whirling frequency range, which means better stability for the rotor system especially in high rotor speeds.
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