Suppression of Supersonic Cavity Oscillations Using Pulsed Upstream Mass Injection
Pulsed upstream mass injection is examined to suppress supersonic cavity oscillations. The efficiency and physics of the noise control are investigated by large-eddy simulations of a turbulent flow (M∞=2.0, ReD=105) past a rectangular cavity with a length-to-depth ratio of 2. Results show that the p...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/6702385 |
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| author | Weipeng Li |
| author_facet | Weipeng Li |
| author_sort | Weipeng Li |
| collection | DOAJ |
| description | Pulsed upstream mass injection is examined to suppress supersonic cavity oscillations. The efficiency and physics of the noise control are investigated by large-eddy simulations of a turbulent flow (M∞=2.0, ReD=105) past a rectangular cavity with a length-to-depth ratio of 2. Results show that the pulsed mass injection behaves less effectively in reducing the cavity oscillations than the steady one. The primary reason is that the pulsed mass injection is ineffective in lifting up the cavity shear layer and in suppressing the turbulent fluctuations in the shear layer. It concluded that breakup of the large-scale vorticial structures into a smaller length scale reveals direct links existing between the large-scale vortices and the radiation of the cavity resonances. |
| format | Article |
| id | doaj-art-ab23cec760fb4384a0b9b1dc3797a9ce |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-ab23cec760fb4384a0b9b1dc3797a9ce2025-02-03T06:44:31ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742016-01-01201610.1155/2016/67023856702385Suppression of Supersonic Cavity Oscillations Using Pulsed Upstream Mass InjectionWeipeng Li0Department of Aeronautics and Astronautics, Shanghai Jiaotong University, Shanghai 200-240, ChinaPulsed upstream mass injection is examined to suppress supersonic cavity oscillations. The efficiency and physics of the noise control are investigated by large-eddy simulations of a turbulent flow (M∞=2.0, ReD=105) past a rectangular cavity with a length-to-depth ratio of 2. Results show that the pulsed mass injection behaves less effectively in reducing the cavity oscillations than the steady one. The primary reason is that the pulsed mass injection is ineffective in lifting up the cavity shear layer and in suppressing the turbulent fluctuations in the shear layer. It concluded that breakup of the large-scale vorticial structures into a smaller length scale reveals direct links existing between the large-scale vortices and the radiation of the cavity resonances.http://dx.doi.org/10.1155/2016/6702385 |
| spellingShingle | Weipeng Li Suppression of Supersonic Cavity Oscillations Using Pulsed Upstream Mass Injection International Journal of Aerospace Engineering |
| title | Suppression of Supersonic Cavity Oscillations Using Pulsed Upstream Mass Injection |
| title_full | Suppression of Supersonic Cavity Oscillations Using Pulsed Upstream Mass Injection |
| title_fullStr | Suppression of Supersonic Cavity Oscillations Using Pulsed Upstream Mass Injection |
| title_full_unstemmed | Suppression of Supersonic Cavity Oscillations Using Pulsed Upstream Mass Injection |
| title_short | Suppression of Supersonic Cavity Oscillations Using Pulsed Upstream Mass Injection |
| title_sort | suppression of supersonic cavity oscillations using pulsed upstream mass injection |
| url | http://dx.doi.org/10.1155/2016/6702385 |
| work_keys_str_mv | AT weipengli suppressionofsupersoniccavityoscillationsusingpulsedupstreammassinjection |