【摘 要】
:
电弧加热推进器(arcjet)广泛应用于电推进和材料处理领域.从喉道到羽流,气体的流动和放电特点变化很大.对其物理过程相对准确的理解有助于我们提高设备性能.本文采用两温度化
【机 构】
:
中国科学院力学研究所高温气体动力学国家重点实验室,北京海淀区100190
【出 处】
:
高温气体动力学国家重点实验室2014年度夏季学术研讨会
论文部分内容阅读
电弧加热推进器(arcjet)广泛应用于电推进和材料处理领域.从喉道到羽流,气体的流动和放电特点变化很大.对其物理过程相对准确的理解有助于我们提高设备性能.本文采用两温度化学非平衡CFD模型计算了arcjet的内流.为了得到自洽的电流和温度分布,计算区域耦合了阳极和阴极.因为喷管出口雷诺数较小并且背压很低,羽流和边界层发生较强的相互作用.出口附近,分子平均自由程达到毫米量级.为了分析稀薄气体效应,出口附近的流动和羽流采用DSMC方法计算.通过比较,DSMC方法在壁面附近给出了明显的速度滑移和温度跳跃.除此之外,两种数值结果都能较好的和实验结果吻合.此外,计算网格的疏密会比较明显的影响到壁面热流和电场强度.
其他文献
To meet the special administration and workmanship in China,a series of new lime technology have been developed in the recent decades with respect of Chines
Optical imaging techniques,because of the non-invasive,non-destructive and fast,large-scale murals reveal a variety of materials and implicit information,ha
The conservation of historic stone buildings and sculptures is recently receiving growing attention and becoming a focus of research.However,it is difficult
Acrylic resin non-aqueous dispersion and silicone ware taken as consolidants for sandstone.The samples were tested in laboratory by many standards:color cha
Some materials can sublime at room-temperature spontaneously,by taking advantage of this property,they can be used as temporary binding media in culture her
Silk is one of the cultural materials which are the important evidence for historians,anthropologists and archaeologists depth study on historical and cultu
Based on analyzing the existing damaged pottery influenced by the NaC1 soluble salt,the hybrid in this study provides a crack-free and homogeneous gel on th
Tetraethoxysilane(TEOS)is the most commonly used silicon-based stone consolidant.It is known in the literature that the resulting silica gel phase tends to
The silane coupling agents modified starch/fluorinated acrylic copolymer latexs were prepared through a two-step procedure.The first grafting was based on t
本文采用考虑材料热物性变化的共轭梯度法求解了三维瞬态热传导逆问题.通过共轭梯度法,用测得的燃烧室外壁面温度反演内壁面的热流和温度.对温度测量误差在反演结果精度上的