CAJ | 학술논문

细水雾对热辐射有着强烈的散射和吸收，可用于舰船等军事目标的红外隐身。将水雾视为吸收、发射、各向异性散射介质，通过谱带离散处理水雾的非灰特性，利用Mie氏理论计算离散谱带内的平均光学系数，建立了8~14μm红外辐射在细水雾中的传输模型，并利用有限体积法进行了分析计算。研究发现，采用均值粒径假设计算辐射透射率时会有一定误差，应用数量矩均值粒径时Sauter粒径误差最小，线性平均粒径误差最大；水雾自身辐射与内散射对透射率的影响较大，计算中应考虑；提高水雾浓度，减小均值粒径，可有效抑制透射率。
세수무대열복사유착강렬적산사화흡수，가용우함선등군사목표적홍외은신。장수무시위흡수、발사、각향이성산사개질，통과보대리산처리수무적비회특성，이용Mie씨이론계산리산보대내적평균광학계수，건립료8~14μm홍외복사재세수무중적전수모형，병이용유한체적법진행료분석계산。연구발현，채용균치립경가설계산복사투사솔시회유일정오차，응용수량구균치립경시Sauter립경오차최소，선성평균립경오차최대；수무자신복사여내산사대투사솔적영향교대，계산중응고필；제고수무농도，감소균치립경，가유효억제투사솔。
For strongly attenuating the heat radiation through scattering and absorbing effect, fine water sprays are used in military object infrared stealth. The 8-14μm infrared radiation attenuation model by water sprays was established, in which water sprays were treated as absorbing, emitting, and anisotropic scattering medium and non-grey properties were dealt with bands discretion method. The average optical parameters in the discrete spectral bands were got by Mie theory and the radiation transfer process was carried out with finite volume method. It is found that there would be some errors when the polydisperse sprays are treated as monodispersion. The errors resulting from Sauter radius is minimum, where as that from the linear average radius is maximum. The inner radiation and scatter of the sprays have biggest influence on the transmission, so it should be considered during calculations. For restraining the radiative transmission effectively, the measures of increasing the sprays concentration and decreasing the geometry average radiuses should be done.