超音速等离子体点火过程的三维数值模拟  

3D numerical simulation of supersonic plasma ignition process

作　　者：宋振兴[1] 何立明[1] 张建邦[1] 赵兵兵[1] 兰宇丹[1] 刘兴建[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《强激光与粒子束》2012年第11期2746-2750,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(50776100)

摘　　要：为了研究等离子体点燃超音速混合气流的过程,设计并验证了超音速燃烧室的三维计算模型,计算出了燃烧室等离子体点火时的流场参数和化学反应规律,分析了等离子体点火对燃烧室内燃烧的影响。计算结果表明:高温等离子体射流的滞止作用通过增加混合气在燃烧室内的停留时间提高了点火效率;等离子体点火时燃烧区域的压力扩散比较充分,内部为压力相对平衡的低速流动;高温等离子体射流高速射向混合气流时产生的速度矢量偏移扩大了点火面积,从而使点火效率得到提高;氢气、空气燃烧的燃烧产物主要是水,燃烧区域局部温度主要受局部放热反应的影响。This paper presents the establishment and validation of the 3D numerical model of plasma ignition to investigate the plasma ignition process in supersonic combustion chamber. Parameters of flow field and chemical reactions in the Nasma igni tion comhustlon chamber are calculated. The effects of plasma ignition on combustion are analyzed. The calculation results show that high temperature plasma jet increases the stay time of mixed gas in comtmstion chamber to improve the ignition efficiency; the combustion zone is incompressible and pressure balanced; velocity vector offset is generated when plasma jet shoots at mixed gases; water is the main product of hydrogen/air combustion and the local temperature is mainly affected by the exothermic reactions

关 键 词：等离子体 高温射流 点火过程 

分 类 号：O461[理学—电子物理学] O433[理学—物理]