Synchronization characteristics of vortex shedding from in-line tube banks on weak acoustic resonance
The present paper focuses on the synchronization behavior of vortex shedding in in-line tube banks with and without acoustic resonance. We have studied the characteristics of acoustic resonance generated by in-line tube banks with a tube pitch ratio of 2.8 in the flow direction. The single high peak...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2024-03-01
|
| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/19/2/19_2024jfst0009/_pdf/-char/en |
| _version_ | 1797230134514679808 |
|---|---|
| author | Hiromitsu HAMAKAWA Kazuki SHIBAYAMA Masaya HIGUCHI Eru KURIHARA Eiichi NISHIDA |
| author_facet | Hiromitsu HAMAKAWA Kazuki SHIBAYAMA Masaya HIGUCHI Eru KURIHARA Eiichi NISHIDA |
| author_sort | Hiromitsu HAMAKAWA |
| collection | DOAJ |
| description | The present paper focuses on the synchronization behavior of vortex shedding in in-line tube banks with and without acoustic resonance. We have studied the characteristics of acoustic resonance generated by in-line tube banks with a tube pitch ratio of 2.8 in the flow direction. The single high peak in the sound pressure level spectrum was formed at the gap velocity from 5.0 m/s to 48.0 m/s. As the gap velocity increased, the peak frequency increased. The Strouhal number became approximately 0.145. At the gap velocity of 23.0 m/s, the acoustic resonance of the first mode occurred in the transverse direction. The flow patterns and vortex shedding of in-line tube banks at acoustic resonance have been experimentally investigated. The vortex flow field in the tube banks was measured by PIV with and without the acoustic resonance phenomenon. The alternative vortices were shed from each tube in tube banks with and without the acoustic resonance. A pair of vortices has been created at the top and bottom of the jet stream flowing between the gaps of two tubes. On the other hand, the phase-aligned alternative vortices were occasionally shed from each tube in tube banks. No acoustic resonance occurred, the phase-aligned alternative vortices were shed for 11.7 % of the 0.4 s period. When acoustic resonance occurred, the proportion of phase-aligned alternate vortices increased from 11.7 % to 31.0 %. The rate of increase in wall sound pressure is approximately equal to the rate of increase in vortex synchronization. The increase in wall sound pressure due to acoustic resonance is primarily due to the synchronization of vortices in the tube banks during the occurrence of weak resonance phenomena. |
| first_indexed | 2024-04-24T15:23:39Z |
| format | Article |
| id | doaj.art-9b0c2d12cc1e49a48eacf6c68c854c40 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-04-24T15:23:39Z |
| publishDate | 2024-03-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-9b0c2d12cc1e49a48eacf6c68c854c402024-04-02T07:08:56ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582024-03-01192JFST0009JFST000910.1299/jfst.2024jfst0009jfstSynchronization characteristics of vortex shedding from in-line tube banks on weak acoustic resonanceHiromitsu HAMAKAWA0Kazuki SHIBAYAMA1Masaya HIGUCHI2Eru KURIHARA3Eiichi NISHIDA4Department of Mechanical Engineering, Oita UniversityDepartment of Mechanical Engineering, Oita UniversityDepartment of Mechanical Engineering, Oita UniversityDepartment of Mechanical Engineering, Oita UniversityShonan Institute of TechnologyThe present paper focuses on the synchronization behavior of vortex shedding in in-line tube banks with and without acoustic resonance. We have studied the characteristics of acoustic resonance generated by in-line tube banks with a tube pitch ratio of 2.8 in the flow direction. The single high peak in the sound pressure level spectrum was formed at the gap velocity from 5.0 m/s to 48.0 m/s. As the gap velocity increased, the peak frequency increased. The Strouhal number became approximately 0.145. At the gap velocity of 23.0 m/s, the acoustic resonance of the first mode occurred in the transverse direction. The flow patterns and vortex shedding of in-line tube banks at acoustic resonance have been experimentally investigated. The vortex flow field in the tube banks was measured by PIV with and without the acoustic resonance phenomenon. The alternative vortices were shed from each tube in tube banks with and without the acoustic resonance. A pair of vortices has been created at the top and bottom of the jet stream flowing between the gaps of two tubes. On the other hand, the phase-aligned alternative vortices were occasionally shed from each tube in tube banks. No acoustic resonance occurred, the phase-aligned alternative vortices were shed for 11.7 % of the 0.4 s period. When acoustic resonance occurred, the proportion of phase-aligned alternate vortices increased from 11.7 % to 31.0 %. The rate of increase in wall sound pressure is approximately equal to the rate of increase in vortex synchronization. The increase in wall sound pressure due to acoustic resonance is primarily due to the synchronization of vortices in the tube banks during the occurrence of weak resonance phenomena.https://www.jstage.jst.go.jp/article/jfst/19/2/19_2024jfst0009/_pdf/-char/envortexacoustic resonancein-line tube banksflow patternsynchronizationboiler |
| spellingShingle | Hiromitsu HAMAKAWA Kazuki SHIBAYAMA Masaya HIGUCHI Eru KURIHARA Eiichi NISHIDA Synchronization characteristics of vortex shedding from in-line tube banks on weak acoustic resonance Journal of Fluid Science and Technology vortex acoustic resonance in-line tube banks flow pattern synchronization boiler |
| title | Synchronization characteristics of vortex shedding from in-line tube banks on weak acoustic resonance |
| title_full | Synchronization characteristics of vortex shedding from in-line tube banks on weak acoustic resonance |
| title_fullStr | Synchronization characteristics of vortex shedding from in-line tube banks on weak acoustic resonance |
| title_full_unstemmed | Synchronization characteristics of vortex shedding from in-line tube banks on weak acoustic resonance |
| title_short | Synchronization characteristics of vortex shedding from in-line tube banks on weak acoustic resonance |
| title_sort | synchronization characteristics of vortex shedding from in line tube banks on weak acoustic resonance |
| topic | vortex acoustic resonance in-line tube banks flow pattern synchronization boiler |
| url | https://www.jstage.jst.go.jp/article/jfst/19/2/19_2024jfst0009/_pdf/-char/en |
| work_keys_str_mv | AT hiromitsuhamakawa synchronizationcharacteristicsofvortexsheddingfrominlinetubebanksonweakacousticresonance AT kazukishibayama synchronizationcharacteristicsofvortexsheddingfrominlinetubebanksonweakacousticresonance AT masayahiguchi synchronizationcharacteristicsofvortexsheddingfrominlinetubebanksonweakacousticresonance AT erukurihara synchronizationcharacteristicsofvortexsheddingfrominlinetubebanksonweakacousticresonance AT eiichinishida synchronizationcharacteristicsofvortexsheddingfrominlinetubebanksonweakacousticresonance |