【摘要】 空气在高温环境下会发生离解、电离等化学反应使组分发生变化 ,从而引起流场状态的改变。以一个低温等离子发生器模型为例 ,应用数值模拟的方法对七种组分 ,七个化学反应的流场求解 ,并与纯空气流场的求解结果进行比较 ,分析化学反应流场流动和传热的特点。在数值模拟过程中采用了局部热力学平衡流体模型 ,数值格式用SIMPLEC算法 ,采用贴体坐标的网格模型。计算结果给出了温度场、速度场及组分变化分布图。更多还原

【Abstract】 Under high temperatures air will undergo such chemical reactions as dissociation and ionization, etc, which can lead to changes in constituent elements, resulting in a change in flow field status. With a low temperature plasma generator model being taken as an example a numerical simulation method was employed to solve for a flow field involving seven kinds of constituent elements and seven chemical reactions. The result was compared with that of a solution for a pure air flow field. The specific features of the flow and heat transfer of a chemical reaction flow field were analyzed. From the perspective of flow field organization a cooling method of generator electrodes is investigated. During a numerical simulation process a local thermodynamic balance fluid model was employed with SIMPLEC algorithm being used for a numerical scheme. A curvilinear coordinate system was put into use for a mesh model. A distribution diagram showing the variation of temperature and speed field and constituent elements was provided by the calculation results.更多还原