Standing waves in the plenum of an open jet wind tunnel: Resonance and self-excited oscillation
The low-frequency pressure pulsations in a large low-speed open jet wind tunnel were studied using a 1:20 scaled model wind tunnel. It was found that plane pressure standing waves existed in all three directions of the wind tunnel’s plenum. It was confirmed that the large pressure pulsations in the...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2022-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0067202 |
| _version_ | 1818488059062124544 |
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| author | Ling Jin Xiao Bing Deng Xunnian Wang Yunsong Gu Yong Liang Zhenzeng Lian |
| author_facet | Ling Jin Xiao Bing Deng Xunnian Wang Yunsong Gu Yong Liang Zhenzeng Lian |
| author_sort | Ling Jin |
| collection | DOAJ |
| description | The low-frequency pressure pulsations in a large low-speed open jet wind tunnel were studied using a 1:20 scaled model wind tunnel. It was found that plane pressure standing waves existed in all three directions of the wind tunnel’s plenum. It was confirmed that the large pressure pulsations in the transverse direction of the plenum were caused by the resonance of the plane pressure standing waves in that direction with the edgetone feedback (vortex-sound feedback between the nozzle and the collector). The analysis of the standing waves in the vertical direction of the plenum suggested that they might come from self-excited oscillations. For the model wind tunnel with a 1:20 strictly scaled collector, the standing waves in the transverse direction of the plenum were much stronger than those in the other two directions. By increasing the width of the collector, the intensity of the standing waves in the transverse direction was significantly reduced to a level similar to that of the standing waves in the vertical direction. It was also found that the standing waves in the transverse direction were significantly enhanced after a floor was added to the test section. |
| first_indexed | 2024-12-10T16:46:14Z |
| format | Article |
| id | doaj.art-629e29abb2dd4c4d8849e1cf977aee9a |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-10T16:46:14Z |
| publishDate | 2022-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-629e29abb2dd4c4d8849e1cf977aee9a2022-12-22T01:41:02ZengAIP Publishing LLCAIP Advances2158-32262022-02-01122025105025105-910.1063/5.0067202Standing waves in the plenum of an open jet wind tunnel: Resonance and self-excited oscillationLing Jin0Xiao Bing Deng1Xunnian Wang2Yunsong Gu3Yong Liang4Zhenzeng Lian5Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaNanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaThe low-frequency pressure pulsations in a large low-speed open jet wind tunnel were studied using a 1:20 scaled model wind tunnel. It was found that plane pressure standing waves existed in all three directions of the wind tunnel’s plenum. It was confirmed that the large pressure pulsations in the transverse direction of the plenum were caused by the resonance of the plane pressure standing waves in that direction with the edgetone feedback (vortex-sound feedback between the nozzle and the collector). The analysis of the standing waves in the vertical direction of the plenum suggested that they might come from self-excited oscillations. For the model wind tunnel with a 1:20 strictly scaled collector, the standing waves in the transverse direction of the plenum were much stronger than those in the other two directions. By increasing the width of the collector, the intensity of the standing waves in the transverse direction was significantly reduced to a level similar to that of the standing waves in the vertical direction. It was also found that the standing waves in the transverse direction were significantly enhanced after a floor was added to the test section.http://dx.doi.org/10.1063/5.0067202 |
| spellingShingle | Ling Jin Xiao Bing Deng Xunnian Wang Yunsong Gu Yong Liang Zhenzeng Lian Standing waves in the plenum of an open jet wind tunnel: Resonance and self-excited oscillation AIP Advances |
| title | Standing waves in the plenum of an open jet wind tunnel: Resonance and self-excited oscillation |
| title_full | Standing waves in the plenum of an open jet wind tunnel: Resonance and self-excited oscillation |
| title_fullStr | Standing waves in the plenum of an open jet wind tunnel: Resonance and self-excited oscillation |
| title_full_unstemmed | Standing waves in the plenum of an open jet wind tunnel: Resonance and self-excited oscillation |
| title_short | Standing waves in the plenum of an open jet wind tunnel: Resonance and self-excited oscillation |
| title_sort | standing waves in the plenum of an open jet wind tunnel resonance and self excited oscillation |
| url | http://dx.doi.org/10.1063/5.0067202 |
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