等离子体发生器内外流场数值模拟  

Numerical Simulation of Internal and External Flow Field in Plasma Generator

作　　者：彭振[1] 翁春生[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094

出　　处：《南京理工大学学报》2010年第5期659-663,共5页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(10672080);高等学校博士学科点专项科研基金(20093219110037)

摘　　要：采用守恒元与求解元(CE/SE)方法对耦合的流体力学方程和麦克斯韦方程求解,同时对等离子体发生器内部流场和外部射流过程进行了数值模拟,讨论了等离子体射流的形成过程和内外流场不同时刻温度、压力、马赫数的变化。结果表明,随着电流的增大,等离子体的温度升高,马赫数增大,最高温度出现在靠近阴极的中心轴线附近;等离子体射流过程的温度随时间而变化,发生器内外流场相互影响,在射流范围内形成高温高速区域。Numerical simulation of the internal and external flow field in a plasma generator is done.Coupling hydrodynamic equations and maxwell equations are solved by using the method of conservation element and solution element（CE/SE）.The variation of the physical parameters inside and outside the plasma generator during the formation of the plasma jet are discussed.Results show that： the temperature and Mach number rise up with the increase of electric currents;the maximum temperature appears around the central axis close to the cathode.The temperature of the plasma jet changes along with time.The internal nozzle and external flow fields influence each other.A high-temperature and high-Mach number area is formed in the jet region obviously.

关 键 词：等离子体发生器 射流 守恒元与求解元方法 流场 数值计算 

分 类 号：V233.3[航空宇航科学与技术—航空宇航推进理论与工程]