Academic Journal
Numerical simulation of reactive flows in overexpanded supersonic nozzle with film cooling
| العنوان: | Numerical simulation of reactive flows in overexpanded supersonic nozzle with film cooling |
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| المؤلفون: | Sellam, Mohamed, Chpoun, Amer |
| المساهمون: | Laboratoire de Mécanique et d'Energétique d'Evry (LMEE), Université d'Évry-Val-d'Essonne (UEVE) |
| المصدر: | ISSN: 1687-5966 ; International Journal of Aerospace Engineering ; https://hal.science/hal-01176470 ; International Journal of Aerospace Engineering, 2015, 2015, (elec. proc.). ⟨10.1155/2015/252404⟩. |
| بيانات النشر: | HAL CCSD Hindawi Publishing Corporation |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Boosters (rocket), Cooling, Engines, Nozzles, Propulsion, Rocket engines, Rocket nozzles, Rockets, Sea level, Thermal load CFD simulations, Chemical mechanism, Cooling efficiency, Flow condition, Injection pressures, Nozzle geometries, Rocket propulsion systems, Supersonic nozzles, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] |
| الوصف: | International audience ; Reignition phenomena occurring in a supersonic nozzle flow may present a crucial safety issue for rocket propulsion systems. These phenomena concern mainly rocket engines which use Hgas (GH in the film cooling device, particularly when the nozzle operates under over expanded flow conditions at sea level or at low altitudes. Consequently, the induced wall thermal loads can lead to the nozzle geometry alteration, which in turn, leads to the appearance of strong side loads that may be detrimental to the rocket engine structural integrity. It is therefore necessary to understand both aerodynamic and chemical mechanisms that are at the origin of these processes. This paper is a numerical contribution which reports results from CFD analysis carried out for supersonic reactive flows in a planar nozzle cooled with GHfilm. Like the experimental observations, CFD simulations showed their ability to highlight these phenomena for the same nozzle flow conditions. Induced thermal load are also analyzed in terms of cooling efficiency and the results already give an idea on their magnitude. It was also shown that slightly increasing the film injection pressure can avoid the reignition phenomena by moving the separation shock towards the nozzle exit section. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-01176470; https://hal.science/hal-01176470; https://hal.science/hal-01176470/document; https://hal.science/hal-01176470/file/252404.pdf |
| DOI: | 10.1155/2015/252404 |
| الاتاحة: | https://hal.science/hal-01176470 https://hal.science/hal-01176470/document https://hal.science/hal-01176470/file/252404.pdf https://doi.org/10.1155/2015/252404 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.258D4D78 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1155/2015/252404 |
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