固体火箭羽流中Al_2O_3粒子的辐射特性

Radiation characteristics of Al_2O_3 particles in solid rocket plume

基于Lorentz-Mie电磁理论，建立了计算Al2O3粒子辐射特性，包括散射截面、吸收截面、散射系数、吸收系数、散射相函数的计算方法，并在假设粒子散射为单次、独立散射的基础上，推导了粒子系辐射特性的计算方法。采用此方法计算了含铝推进剂固体发动机尾喷流在2～5μm光谱范围内Al2O3粒子的辐射特性。结果表明，用Lorentz-Mie电磁理论计算Al2O3粒子的辐射特性是有效的、可靠的。

Based on the Lorentz-Mie theory, the computation methods for radiation characteristics of Al2O3 particles, including scattering cross-section, absorption cross-section, scattering coefficient and absorption coefficient, were established. Then the computation methods for radiation characteristics of particle clouds were derived on the assumption that the particle scattering was single and independent. Radiation characteristics of Al2O3 particles within 2 - 5μm spectrum in the exhaust system of aluminized solid motor propellant were calculated by the method. The results show that the computation methods for radiation characteristics of Al2O3 particles on the basis of Lorentz-Mie theory are effective and reliable.