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首页> 外文期刊>The Aeronautical Journal >Stagnation pressure effect on the supersonic flow parameters with application for air in nozzles
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Stagnation pressure effect on the supersonic flow parameters with application for air in nozzles

机译：停滞压力对超音速流动参数的影响及其在喷嘴中的应用

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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.
机译：当理想气体的停滞压力增加时，比热及其比值不再保持恒定，并开始随该压力而变化。气体不能保持完美。它的状态方程式改变，变成了真实的气体。在这种情况下，分子大小和分子间吸引力的影响会介入以修正状态方程。这项工作的目的是确定停滞压力对热力学，物理和几何超声速流动参数的影响，以便找到真实气体的一般形式。假设Berthelot状态方程考虑了分子大小和分子间作用力，就建立了表达式，用于分析低于和离解分子阈值的热和热量不完全气体的超音速流。超音速喷嘴状推力系数的设计参数直接取决于燃烧室的停滞参数。空气中的应用程序。在这种情况下，对误差进行了计算，以给出与实际气体模型相比理想气体模型的极限。

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