Repetitive Energy Deposition at a Supersonic Intake in Subcritical and Buzz Modes
| العنوان: | Repetitive Energy Deposition at a Supersonic Intake in Subcritical and Buzz Modes |
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| المؤلفون: | Manabu Myokan, Akira Iwakawa, Akiya Kubota, Akihiro Sasoh |
| المصدر: | AIAA Journal. 58(1):107-117 |
| بيانات النشر: | American Institute of Aeronautics and Astronautics, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Shock wave, 020301 aerospace & aeronautics, Supersonic wind tunnel, Materials science, Aerospace Engineering, Internal pressure, 02 engineering and technology, Mechanics, Conical surface, Laser, 01 natural sciences, 010305 fluids & plasmas, law.invention, 0203 mechanical engineering, law, 0103 physical sciences, Deposition (phase transition), Supersonic speed, Choked flow |
| الوصف: | This study experimentally investigated the effects of repetitive laser energy deposition using a supersonic intake model with a central conical compression surface and a 19×19 mm^2 cross-sectional duct in a Mach 1.92 indraft wind tunnel: especially in the subcritical and buzz modes. A single-pulse energy deposition was observed to suppress the flow separation at the compression surface by “sweeping” a shock wave system with the thermal bubble generated by the energy deposition. The duration of the sweeping effect was approximately 160 μs in the subcritical mode and 100–420 μs in the buzz mode. Furthermore, repetitive deposition of laser pulse energies was observed to moderate instabilities in both modes, and it increased the pressure recovery by as much as 8%; also, the occurrence of buzz was delayed, thereby widening the stable, subcritical regime. In both modes, there was a threshold value for the laser pulse repetition frequency fL, thd, which corresponded to the duration of the sweeping effect (e.g., fthd=6 kHz in subcritical mode). Below this frequency, the increase in the pressure was proportional to the repetition frequency; whereas above fthd, the effect per single pulse was reduced. Published Online:26 Oct 2019 |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0001-1452 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a76345c7d2c6a4056ecda8587befe075 https://nagoya.repo.nii.ac.jp/records/30067 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....a76345c7d2c6a4056ecda8587befe075 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00011452 |
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