Numerical Investigation of the Coupling Effects of Pulsed H<sub>2</sub> Jets and Nanosecond-Pulsed Actuation in Supersonic Crossflow
Numerical investigations were conducted to analyze the coupling effects of pulsed H<sub>2</sub> jets and nanosecond-pulsed actuation (NS-SDBD) in a supersonic crossflow. The FVM was employed to solve the multi-component 2D URANS equations with the SST k-omega turbulence model, while H<...
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2025-01-01
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| author | Keyu Li Jiangfeng Wang |
| author_facet | Keyu Li Jiangfeng Wang |
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| description | Numerical investigations were conducted to analyze the coupling effects of pulsed H<sub>2</sub> jets and nanosecond-pulsed actuation (NS-SDBD) in a supersonic crossflow. The FVM was employed to solve the multi-component 2D URANS equations with the SST k-omega turbulence model, while H<sub>2</sub>-air combustion was described using a seven species–seven reactions chain reaction model, and the plasma thermal effect was represented by a phenomenological model. The backward-facing step flows with an inlet Mach number of 2.5 and a pulsed jet frequency of 10 kHz under different actuation conditions were simulated. The combustion enhancement mechanism under an actuation frequency of 20 kHz was analyzed. Research indicates that compression waves induced by NS-SDBD enhance H<sub>2</sub>-air mixing and facilitate temperature transport as the flow progresses. This progress is significantly associated with the flow structures generated by pulsed jets. Under this condition, the fuel utilization rate in the flow field increased by 61.2%, the total pressure recovery coefficient increased by 5.34%, and the outlet total temperature slightly increased even with a 50% reduction in fuel flow rate. Comparative analysis of different actuation cases demonstrates that evenly distributed actuation within the jet cycle yields better effects. The innovation of this study lies in proposing and exploring a potential method to address inadequate combustion under high-speed inflow conditions, which couples NS-SDBD with pulsed hydrogen jets. |
| format | Article |
| id | doaj-art-256d338b7bff44fc9b35dd9047355d72 |
| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Aerospace |
| spelling | doaj-art-256d338b7bff44fc9b35dd9047355d722025-01-24T13:15:36ZengMDPI AGAerospace2226-43102025-01-011214410.3390/aerospace12010044Numerical Investigation of the Coupling Effects of Pulsed H<sub>2</sub> Jets and Nanosecond-Pulsed Actuation in Supersonic CrossflowKeyu Li0Jiangfeng Wang1Key Laboratory of Unsteady Aerodynamics and Flow Control, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaKey Laboratory of Unsteady Aerodynamics and Flow Control, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaNumerical investigations were conducted to analyze the coupling effects of pulsed H<sub>2</sub> jets and nanosecond-pulsed actuation (NS-SDBD) in a supersonic crossflow. The FVM was employed to solve the multi-component 2D URANS equations with the SST k-omega turbulence model, while H<sub>2</sub>-air combustion was described using a seven species–seven reactions chain reaction model, and the plasma thermal effect was represented by a phenomenological model. The backward-facing step flows with an inlet Mach number of 2.5 and a pulsed jet frequency of 10 kHz under different actuation conditions were simulated. The combustion enhancement mechanism under an actuation frequency of 20 kHz was analyzed. Research indicates that compression waves induced by NS-SDBD enhance H<sub>2</sub>-air mixing and facilitate temperature transport as the flow progresses. This progress is significantly associated with the flow structures generated by pulsed jets. Under this condition, the fuel utilization rate in the flow field increased by 61.2%, the total pressure recovery coefficient increased by 5.34%, and the outlet total temperature slightly increased even with a 50% reduction in fuel flow rate. Comparative analysis of different actuation cases demonstrates that evenly distributed actuation within the jet cycle yields better effects. The innovation of this study lies in proposing and exploring a potential method to address inadequate combustion under high-speed inflow conditions, which couples NS-SDBD with pulsed hydrogen jets.https://www.mdpi.com/2226-4310/12/1/44nanosecond pulsed dischargesupersonic combustion flowpulsed jetjet in crossflowflow control |
| spellingShingle | Keyu Li Jiangfeng Wang Numerical Investigation of the Coupling Effects of Pulsed H<sub>2</sub> Jets and Nanosecond-Pulsed Actuation in Supersonic Crossflow Aerospace nanosecond pulsed discharge supersonic combustion flow pulsed jet jet in crossflow flow control |
| title | Numerical Investigation of the Coupling Effects of Pulsed H<sub>2</sub> Jets and Nanosecond-Pulsed Actuation in Supersonic Crossflow |
| title_full | Numerical Investigation of the Coupling Effects of Pulsed H<sub>2</sub> Jets and Nanosecond-Pulsed Actuation in Supersonic Crossflow |
| title_fullStr | Numerical Investigation of the Coupling Effects of Pulsed H<sub>2</sub> Jets and Nanosecond-Pulsed Actuation in Supersonic Crossflow |
| title_full_unstemmed | Numerical Investigation of the Coupling Effects of Pulsed H<sub>2</sub> Jets and Nanosecond-Pulsed Actuation in Supersonic Crossflow |
| title_short | Numerical Investigation of the Coupling Effects of Pulsed H<sub>2</sub> Jets and Nanosecond-Pulsed Actuation in Supersonic Crossflow |
| title_sort | numerical investigation of the coupling effects of pulsed h sub 2 sub jets and nanosecond pulsed actuation in supersonic crossflow |
| topic | nanosecond pulsed discharge supersonic combustion flow pulsed jet jet in crossflow flow control |
| url | https://www.mdpi.com/2226-4310/12/1/44 |
| work_keys_str_mv | AT keyuli numericalinvestigationofthecouplingeffectsofpulsedhsub2subjetsandnanosecondpulsedactuationinsupersoniccrossflow AT jiangfengwang numericalinvestigationofthecouplingeffectsofpulsedhsub2subjetsandnanosecondpulsedactuationinsupersoniccrossflow |