摘要
通过求解层流Navier-Stokes方程和组分输运方程,数值模拟了化学氧碘激光(COIL)三维扩压器和光腔中10组分21反应的内流流场,计算中没有考虑水蒸气在低温下的冷凝以及激光能量的输出。通过与国外文献计算结果比较可知,物性系数、化学反应速率常数、边界条件处理等对组分浓度影响较大,缺乏这些数据库将会影响计算结果。计算表明,三维副流射流基本穿透主流到达中心线,主副流混合较强,激发态粒子高浓度区主要在中心线附近,因此,也只有在中心线附近有较强的小信号增益系数,进一步研究混合增强技术可以提高原材料的使用效率以及激光的出光功率。本研究可为强激光武器系统之新型压力恢复系统的设计提供技术储备。
In this paper, the inner flow＇field of a supersonic flow Chemical Oxygen-Iodine Laser （COIL） is simulated by solving 3D Navier-Stokes equations. The used chemical kinetic model includes 21 chemical reactions and 10 chemical species. In computation, it is assumed that the flow is laminar and the water vapor condensation due to the supersonic cooling is ignored. By comparison with computation results of reference, it is cleared that material parameters, chemical reaction rate constants and boundary conditions affect the species concentration very much. Thus, in order to increase the laser power, the small signal coefficient would be increased by enhancing the relying. At last, the present computation results agree with the reference satisfactorily, it is suggested that the present research has developed an effective calculation method for COIL flow.
出处
《空气动力学学报》
EI
CSCD
北大核心
2006年第4期444-449,共6页
Acta Aerodynamica Sinica
基金
国家自然科学基金资助项目(10572145
10502055)
关键词
COIL
总压边界条件
组分输运
化学反应
数值模拟
Boundary conditions
Chemical reactions
Computer simulation
Condensation
Cooling
Iodine
Navier Stokes equations
Oxygen
Rate constants
Reaction kinetics
Supersonic flow
