Interaction between Uneven Cavity Length and Shaft Vibration at the Inception of Synchronous Rotating Cavitation
Asymmetric cavitation is known as one type of the sources of cavitation induced vibration in turbomachinery. Cavity lengths are unequal on each blade under condition of synchronous rotating cavitation, which causes synchronous shaft vibration. To investigate the relationship of the cavity length, fl...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2008-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2008/218978 |
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| author | Y. Yoshida Y. Kazami K. Nagaura M. Shimagaki Y. Iga T. Ikohagi |
| author_facet | Y. Yoshida Y. Kazami K. Nagaura M. Shimagaki Y. Iga T. Ikohagi |
| author_sort | Y. Yoshida |
| collection | DOAJ |
| description | Asymmetric cavitation is known as one type of the sources of cavitation induced vibration in turbomachinery. Cavity lengths are unequal on each blade under condition of synchronous rotating cavitation, which causes synchronous shaft vibration. To investigate the relationship of the cavity length, fluid force, and shaft vibration in a cavitating inducer with three blades, we observed the unevenness of cavity length at the inception of synchronous rotating cavitation. The fluid force generated by the unevenness of the cavity length was found to grow exponentially, and the amplitude of shaft vibration was observed to increase exponentially. These experimental results indicate that the synchronous shaft vibration due to synchronous rotating cavitation is like selfexcited vibrations arising from the coupling between cavitation instability and rotordynamics. |
| format | Article |
| id | doaj-art-2c96fbd5b83944ba9b8a4ecc1a074573 |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2008-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-2c96fbd5b83944ba9b8a4ecc1a0745732025-02-03T01:01:03ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342008-01-01200810.1155/2008/218978218978Interaction between Uneven Cavity Length and Shaft Vibration at the Inception of Synchronous Rotating CavitationY. Yoshida0Y. Kazami1K. Nagaura2M. Shimagaki3Y. Iga4T. Ikohagi5Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency, 1 Koganezawa, Kimigaya, Kakuda 981-1525, JapanInstitute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba, Sendai, Miyagi 980-8577, JapanFoundation for Promotion of Japanese Aerospace Technology, 1 Koganezawa, Kimigaya, Kakuda, Miyagi 981-1525, JapanSpace Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency, 1 Koganezawa, Kimigaya, Kakuda 981-1525, JapanInstitute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba, Sendai, Miyagi 980-8577, JapanInstitute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba, Sendai, Miyagi 980-8577, JapanAsymmetric cavitation is known as one type of the sources of cavitation induced vibration in turbomachinery. Cavity lengths are unequal on each blade under condition of synchronous rotating cavitation, which causes synchronous shaft vibration. To investigate the relationship of the cavity length, fluid force, and shaft vibration in a cavitating inducer with three blades, we observed the unevenness of cavity length at the inception of synchronous rotating cavitation. The fluid force generated by the unevenness of the cavity length was found to grow exponentially, and the amplitude of shaft vibration was observed to increase exponentially. These experimental results indicate that the synchronous shaft vibration due to synchronous rotating cavitation is like selfexcited vibrations arising from the coupling between cavitation instability and rotordynamics.http://dx.doi.org/10.1155/2008/218978 |
| spellingShingle | Y. Yoshida Y. Kazami K. Nagaura M. Shimagaki Y. Iga T. Ikohagi Interaction between Uneven Cavity Length and Shaft Vibration at the Inception of Synchronous Rotating Cavitation International Journal of Rotating Machinery |
| title | Interaction between Uneven Cavity Length and Shaft Vibration at the Inception of Synchronous Rotating Cavitation |
| title_full | Interaction between Uneven Cavity Length and Shaft Vibration at the Inception of Synchronous Rotating Cavitation |
| title_fullStr | Interaction between Uneven Cavity Length and Shaft Vibration at the Inception of Synchronous Rotating Cavitation |
| title_full_unstemmed | Interaction between Uneven Cavity Length and Shaft Vibration at the Inception of Synchronous Rotating Cavitation |
| title_short | Interaction between Uneven Cavity Length and Shaft Vibration at the Inception of Synchronous Rotating Cavitation |
| title_sort | interaction between uneven cavity length and shaft vibration at the inception of synchronous rotating cavitation |
| url | http://dx.doi.org/10.1155/2008/218978 |
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