摘要
考虑了羽流组分间的化学反应,应用Roe-FDS格式求解羽流场,再用羽流场参数作为输入条件,采用离散坐标法和谱带近似法对固体火箭发动机羽流在光谱2～5μm内的红外辐射特性进行了计算,羽流气相辐射强度随波长变化规律的计算结果与实验值基本一致。计算结果表明,不同羽流位置点的光谱辐射强度随波长变化规律一致,纯气相辐射强度在2.7μm和4.3μm处出现峰值,随羽流场轴向和径向尺寸的增大而减小,在其他波段无明显变化规律;气相与粒子总辐射强度随波长的增大而减小,其辐射强度远大于纯气相的辐射强度;观测方向与羽流轴线夹角的方位角增大,红外辐射强度减小。
In consideration of the reaction between the components of solid rocket motor（SRM） exhaust plume,the fluid field of plume was calculated using Roe-FDS ways.With the fields of pressures,temperatures and main components（H2O,CO2,CO,Al2O3）of the ground SRM exhaust plume as input data,the discrete ordinate method（DOM）was used to calculate the 2~5 μm infrared spectral radiation properties of the plume.The calculation result of change rule of the gas-radiant intensity with wavelength is basically agreed with that of experiment.The result shows that the change rule of the radiant intensity with wavelength at different place of plume is identical.The peak values of gas-radiant intensity appear at 2.7 μm and 4.3 μm spectral band,which decreases with the distance increasing along axis and radial direction.The gas particle-radiant intensity,which is far greater than gas-radiant intensity,decreases with the increasing of wavelength.The infrared radiant intensity decreases with increasing of azimuth angle between observation direction and axis direction of plume.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2010年第2期176-181,共6页
Journal of Solid Rocket Technology
关键词
固体火箭发动机
羽流
离散坐标法
红外特性
solid rocket motor（SRM）
exhaust plume
discrete ordinate method
infrared radiation
