CAJ | 학술논문

基于有限元热分析法，建立了黑体腔三维有限元模型，分析了黑体腔结构参数、热物性参数、黑体腔初始预热温度对黑体腔测温过程中动态特性的影响。研究结果表明：黑体腔结构参数的改变直接影响黑体腔动态测温误差、动态响应时间、腔体发射率，进而影响黑体腔性能。黑体腔动态测温误差随着比热或密度的增大而增大。黑体腔初始预热温度对黑体腔动态测温影响较大，初始预热温度每增加100℃，最大测温误差减小50℃左右，动态响应时间减少5 s左右。
기우유한원열분석법，건립료흑체강삼유유한원모형，분석료흑체강결구삼수、열물성삼수、흑체강초시예열온도대흑체강측온과정중동태특성적영향。연구결과표명：흑체강결구삼수적개변직접영향흑체강동태측온오차、동태향응시간、강체발사솔，진이영향흑체강성능。흑체강동태측온오차수착비열혹밀도적증대이증대。흑체강초시예열온도대흑체강동태측온영향교대，초시예열온도매증가100℃，최대측온오차감소50℃좌우，동태향응시간감소5 s좌우。
Based on finite element analysis method,three dimensional(3D)finite element model for blackbody cavity is established,analyze effect of structural parameters of blackbody cavity,thermal physical property parameters,initial preheating temperature on dynamic characteristics of blackbody cavity temperature measuring process. The result shows that change of blackbody cavity structure parameters directly influence on cavity dynamic temperature measurement error, dynamic response time,cavity emissivity,and then affects performance of blackbody cavity. The cavity dynamic measurement error increases with the increasing of heat capacity or density. Influence of blackbody cavity initial preheating temperature on dynamic temperature measuring of blackbody cavity is great,when the preheating temperature increases 100℃,the maximum dynamic measurement error reduces 50℃,dynamic response time reduces about 5 s.