等离子体发生器内高温空气化学反应流场分析

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。

Flow Field Analysis of the Chemical Reaction of High-temperature Air in a Plasma Generator

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.