التفاصيل البيبلوغرافية
| العنوان: |
Stagnation pressure effect on the supersonic flow parameters with application for air in nozzles. |
| المؤلفون: |
Salhi, Merouane, Zebbiche, Toufik, Mehalem, Abderrahmane |
| المصدر: |
Aeronautical Journal; Feb2016, Vol. 120 Issue 1224, p313-354, 42p |
| مصطلحات موضوعية: |
SUPERSONIC aerodynamics, STAGNATION pressure, AIR flow, NOZZLES, IDEAL gases, THERMODYNAMICS |
| مستخلص: |
When the stagnation pressure of a perfect gas increases, the specific heat and their ratio do not remain constant anymore and start to vary with this pressure. The gas doesn't stay perfect. Its state equation changes and it becomes a real gas. In this case, the effects of molecular size and intermolecular attraction forces intervene to correct the state equation. The aim of this work is to determine the effect of stagnation pressure on the thermodynamic, physical and geometrical supersonic flow parameters in order to find a general form for real gas. With the assumptions that Berthelot's state equation accounts for molecular size and intermolecular force effects, expressions are developed for analysing the supersonic flow for thermally and calorically imperfect gas lower than the dissociation molecules threshold. The design parameters of the supersonic nozzle-like thrust coefficient depend directly on the stagnation parameters of the combustion chamber. The application made for air. A computation of error was made in this case to give a limit of the perfect gas model compared to the real gas model. [ABSTRACT FROM PUBLISHER] |
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