Proceedings of the
9th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2022)
15 – 18 November 2022, Singapore

A Study on The Stability of the Rotor of the Cryogenic Centrifugal Pump

Chae Sil Kim1,a and Neong Kyo Ha1

1Department of Mechanical Engineering, Changwon National University, 20-2, Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do, Republic of Korea


The stability of the rotor of the centrifugal pump operating at a cryogenic temperature (-196°C) with/without an inducer shall be ensured. This paper describes the analysis process of determining the stability of the rotor for a cryogenic centrifugal pump in the design step using ARMD, a commercial program for rotor analysis. First, the accuracy of a finite element model of the rotor through comparative analysis of ANSYS and ARMD at convential and cryogenic circuimstances is verified, Second, ARMD is used to analyze the critical speed of the rotor with/without an inducer in a cryogenic situation. Finally, the stability of the seal gap is confirmed by an unbalanced response analysis under cryogenic conditions.

Keywords: Cryogenic, Rotodynamic, ARMD, ANSYS

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