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首页> 外文期刊>Chinese journal of aeronautics >Supersonic Two-Dimensional Minimum Length Nozzle Design at High Temperature. Application for Air
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Supersonic Two-Dimensional Minimum Length Nozzle Design at High Temperature. Application for Air

机译：高温下的超音速二维最小长度喷嘴设计。申请空气

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When the stagnation temperature of a perfect gas increases, the specific heat ratio does not remain constant any more, and start to vary with this temperature. The gas remains perfect, its state equation remains always valid, except it will name in more calorically imperfect gas or gas at High Temperature. The goal of this work is to trace the profiles of the supersonic Minimum Length Nozzle with centered expansion when the stagnation temperature is taken into account, lower than the threshold of dissociation of the molecules and to have for each exit Mach number several nozzles shapes by changing the value of the temperature. The method of characteristics is used with a new form of the Prandtl Meyer function at high temperature. The resolution of the obtained equations is done by the second order of finite differences method by using the predictor corrector algorithm. A study on the error given by the perfect gas model compared to our model is presented. The comparison is made with a calorically perfect gas for goal to give a limit of application of this model. The application is for the air.
机译：当理想气体的停滞温度升高时，比热比不再保持恒定，并开始随该温度变化。气体保持完美状态，其状态方程式始终有效，除非它将命名为热量更高的不完全气体或高温气体。这项工作的目的是在考虑停滞温度时追踪具有中心膨胀的超声速最小长度喷嘴的轮廓，该温度低于分子的解离阈值，并通过改变每个喷嘴的马赫数，使多个喷嘴形状变化。温度值。在高温下，特征方法与新形式的Prandtl Meyer函数一起使用。通过使用预测器校正器算法的二阶有限差分方法来完成所获得方程的解析。提出了与我们的模型相比，理想气体模型给出的误差的研究。为了达到目标，使用热量理想的气体进行了比较，以限制该模型的应用。该应用程序适用于空气。

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