The CO 2 dissociation in supersonic nozzles has recently become of great interest. The non-equilibrium in supersonic nozzles is the key for an efficient CO 2 dissociation. This study has two objectives. First, the development of one dimensional models is targeted. Second, the influence of different steering conditions and design parameters on CO 2 vibrational non-equilibrium have been studied within the framework of developed models. In this paper, a simple method, the semi-analytical model, is presented which despite being very simple and fast (few seconds) can perform as well as its more sophisticated counterparts. For validation purposes we also developed and applied a quasi-1D numerical model. The influence of the expansion length, as a design parameter, on the non-equilibrium is investigated. It is found that there is no optimal Mach number as long as the expansion length is carefully chosen. The higher the Mach number, the more significant the...

中文翻译：

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超音速膨胀中CO 2振动不平衡的一维数值分析

近来，在超音速喷嘴中的CO 2离解已引起极大的兴趣。超声波喷嘴中的非平衡是有效CO 2离解的关键。这项研究有两个目标。首先，针对一维模型的开发。其次，在开发模型的框架内研究了不同转向条件和设计参数对CO 2振动非平衡的影响。在本文中，提出了一种简单的方法，即半分析模型，该模型尽管非常简单，快速（几秒钟），却可以执行与更复杂的方法相同的方法。为了验证，我们还开发并应用了准一维数值模型。研究了膨胀长度作为设计参数对不平衡的影响。已经发现，只要仔细选择扩展长度，就没有最佳马赫数。马赫数越高，则...