CAJ | 학술논문

研究了温度环境试验中试件温度稳定时间的估算方法.以非稳态传热学理论为基础,分别用集中参数法和有限元法计算、分析试件的温度稳定时间.给出了集中参数法确定试件温度稳定时间的计算公式,确定了集中参数法的适用范围.研究了试件外表面与试验介质之间的传热系数确定方法,考虑风速、试件外形和试验介质性质对传热的影响.将集中参数法与有限元法计算、分析结果进行比较,相符性较好.
연구료온도배경시험중시건온도은정시간적고산방법.이비은태전열학이론위기출,분별용집중삼수법화유한원법계산、분석시건적온도은정시간.급출료집중삼수법학정시건온도은정시간적계산공식,학정료집중삼수법적괄용범위.연구료시건외표면여시험개질지간적전열계수학정방법,고필풍속、시건외형화시험개질성질대전열적영향.장집중삼수법여유한원법계산、분석결과진행비교,상부성교호.
Based on transient heat transfer theory, temperature stabilization time was analyzed by lumped parameter method and finite element method respectively. The calculation formula of lumped parameter method and is application limitation was put forward. Considering the effect of wind speed, sample medium, and outer surface, the method to determine the heat transfer coefficient between sample medium and outer surface was studied. The results of lumped parameter method were compared with that of finite element method, and it was founded that they are consistent with each other.