In the design of rocket turbopump with high energy density, rotordynamics considerations are very important to stabilize the motion of the shaft. Rotordynamic instabilities generated by rotordynamic fluid forces are often reported. It is recognized that the forces affect the whirling motion of the rotor, and induce the self-excited vibration. To understand the effect of the rotordynamic fluid forces of the impellers on rotor vibration, a tangential fluid force in a forward whirling direction and a normal fluid force in a radial direction were measured by using the experimental apparatus with an active magnetic bearing. As the experimental result for a closed impeller and an open impeller, it was clarified their fluid forces are quite different in the characteristics of destabilizing/damping effects and restoring/inertia effects.
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ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4475-5
PROCEEDINGS PAPER
Comparison of Rotordynamic Fluid Forces Between Closed Impeller and Open Impeller
Masaharu Uchiumi,
Masaharu Uchiumi
Japan Aerospace Exploration Agency, Kakuda, Miyagi, Japan
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Naoki Nagao,
Naoki Nagao
Japan Aerospace Exploration Agency, Tsukuba, Miyagi, Japan
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Yoshiki Yoshida,
Yoshiki Yoshida
Japan Aerospace Exploration Agency, Kakuda, Miyagi, Japan
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Masato Eguchi
Masato Eguchi
Ebara Corporation, Futtsu, Chiba, Japan
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Masaharu Uchiumi
Japan Aerospace Exploration Agency, Kakuda, Miyagi, Japan
Naoki Nagao
Japan Aerospace Exploration Agency, Tsukuba, Miyagi, Japan
Yoshiki Yoshida
Japan Aerospace Exploration Agency, Kakuda, Miyagi, Japan
Masato Eguchi
Ebara Corporation, Futtsu, Chiba, Japan
Paper No:
FEDSM2012-72348, pp. 521-527; 7 pages
Published Online:
July 24, 2013
Citation
Uchiumi, M, Nagao, N, Yoshida, Y, & Eguchi, M. "Comparison of Rotordynamic Fluid Forces Between Closed Impeller and Open Impeller." Proceedings of the ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 1: Symposia, Parts A and B. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 521-527. ASME. https://doi.org/10.1115/FEDSM2012-72348
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