Investigation of Flow Control in an Ultra-Compact Serpentine Inlet with Fluidic Oscillators
For optimal aerodynamic efficiency of specific ultra-compact serpentine intake, fluid oscillators are utilized to regulate airflow. This study employs advanced numerical simulation techniques to examine the effects of various control positions, jet angles, and excitation pressures on flow control ef...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Aerospace |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2226-4310/11/12/1011 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846106526321737728 |
|---|---|
| author | Lei Liu Maolong Bai Zhihao Wang Zhengkang Lin Kun Wang Huijun Tan Ziyun Wang |
| author_facet | Lei Liu Maolong Bai Zhihao Wang Zhengkang Lin Kun Wang Huijun Tan Ziyun Wang |
| author_sort | Lei Liu |
| collection | DOAJ |
| description | For optimal aerodynamic efficiency of specific ultra-compact serpentine intake, fluid oscillators are utilized to regulate airflow. This study employs advanced numerical simulation techniques to examine the effects of various control positions, jet angles, and excitation pressures on flow control efficacy. Control position significantly impacts the flow field structure within the intake, with a lower surface jet configuration outperforming an upper surface scheme. Optimal performance is achieved with the upper and lower surface jet angles set at 20° and 25°, respectively, under an input pressure of 2.5 times the total inlet pressure. This configuration enhances the total pressure recovery coefficient and reduces the steady-state circumferential distortion index and circumferential total pressure distortion coefficient. However, the flow rate ratio coefficient is notably high. While higher excitation pressures for the fluid oscillator do not inherently exhibit greater effectiveness, careful calibration is essential to accommodate varying positions. Optimal excitation pressure is established for the upper surface, while the control effect on the lower surface improves with increasing excitation pressure. Jet angles significantly affect the fluid oscillator’s control mechanism; small-angle jets effectively add energy to the separation zone, mitigating flow separation, whereas larger jet angles introduce excessive disturbances that outweigh their benefits. Overall, smaller jet angles enhance control effectiveness. |
| format | Article |
| id | doaj-art-eae11149df9d4475b4b3fa047f97bc0f |
| institution | Kabale University |
| issn | 2226-4310 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj-art-eae11149df9d4475b4b3fa047f97bc0f2024-12-27T14:02:32ZengMDPI AGAerospace2226-43102024-12-011112101110.3390/aerospace11121011Investigation of Flow Control in an Ultra-Compact Serpentine Inlet with Fluidic OscillatorsLei Liu0Maolong Bai1Zhihao Wang2Zhengkang Lin3Kun Wang4Huijun Tan5Ziyun Wang6School of Power and Energy, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaSchool of Power and Energy, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaSchool of Power and Energy, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaSchool of Power and Energy, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaSchool of Power and Energy, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaSchool of Power and Energy, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaSchool of Power and Energy, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaFor optimal aerodynamic efficiency of specific ultra-compact serpentine intake, fluid oscillators are utilized to regulate airflow. This study employs advanced numerical simulation techniques to examine the effects of various control positions, jet angles, and excitation pressures on flow control efficacy. Control position significantly impacts the flow field structure within the intake, with a lower surface jet configuration outperforming an upper surface scheme. Optimal performance is achieved with the upper and lower surface jet angles set at 20° and 25°, respectively, under an input pressure of 2.5 times the total inlet pressure. This configuration enhances the total pressure recovery coefficient and reduces the steady-state circumferential distortion index and circumferential total pressure distortion coefficient. However, the flow rate ratio coefficient is notably high. While higher excitation pressures for the fluid oscillator do not inherently exhibit greater effectiveness, careful calibration is essential to accommodate varying positions. Optimal excitation pressure is established for the upper surface, while the control effect on the lower surface improves with increasing excitation pressure. Jet angles significantly affect the fluid oscillator’s control mechanism; small-angle jets effectively add energy to the separation zone, mitigating flow separation, whereas larger jet angles introduce excessive disturbances that outweigh their benefits. Overall, smaller jet angles enhance control effectiveness.https://www.mdpi.com/2226-4310/11/12/1011ultra-compact serpentine inletfluid oscillatorflow controltotal pressure distortion |
| spellingShingle | Lei Liu Maolong Bai Zhihao Wang Zhengkang Lin Kun Wang Huijun Tan Ziyun Wang Investigation of Flow Control in an Ultra-Compact Serpentine Inlet with Fluidic Oscillators Aerospace ultra-compact serpentine inlet fluid oscillator flow control total pressure distortion |
| title | Investigation of Flow Control in an Ultra-Compact Serpentine Inlet with Fluidic Oscillators |
| title_full | Investigation of Flow Control in an Ultra-Compact Serpentine Inlet with Fluidic Oscillators |
| title_fullStr | Investigation of Flow Control in an Ultra-Compact Serpentine Inlet with Fluidic Oscillators |
| title_full_unstemmed | Investigation of Flow Control in an Ultra-Compact Serpentine Inlet with Fluidic Oscillators |
| title_short | Investigation of Flow Control in an Ultra-Compact Serpentine Inlet with Fluidic Oscillators |
| title_sort | investigation of flow control in an ultra compact serpentine inlet with fluidic oscillators |
| topic | ultra-compact serpentine inlet fluid oscillator flow control total pressure distortion |
| url | https://www.mdpi.com/2226-4310/11/12/1011 |
| work_keys_str_mv | AT leiliu investigationofflowcontrolinanultracompactserpentineinletwithfluidicoscillators AT maolongbai investigationofflowcontrolinanultracompactserpentineinletwithfluidicoscillators AT zhihaowang investigationofflowcontrolinanultracompactserpentineinletwithfluidicoscillators AT zhengkanglin investigationofflowcontrolinanultracompactserpentineinletwithfluidicoscillators AT kunwang investigationofflowcontrolinanultracompactserpentineinletwithfluidicoscillators AT huijuntan investigationofflowcontrolinanultracompactserpentineinletwithfluidicoscillators AT ziyunwang investigationofflowcontrolinanultracompactserpentineinletwithfluidicoscillators |