CAJ | 학술논문

基于实验室测试，在考虑比热容与环境温度关系的基础上，通过有限元数值模拟，采用二分法对松散煤体在不同环境温度下的导热系数进行研究。研究结果表明：在已知煤样挥发分的条件下，煤样的比热容与环境温度呈线性关系。根据煤样的热传导模型，通过二分法选取热传导系数，将数值模拟煤样温度随时间的变化规律与实测结果进行对比分析，逐步逼近确定煤样在不同环境温度时的导热系数。煤样导热系数随环境温度升高而线性增大。
기우실험실측시，재고필비열용여배경온도관계적기출상，통과유한원수치모의，채용이분법대송산매체재불동배경온도하적도열계수진행연구。연구결과표명：재이지매양휘발분적조건하，매양적비열용여배경온도정선성관계。근거매양적열전도모형，통과이분법선취열전도계수，장수치모의매양온도수시간적변화규률여실측결과진행대비분석，축보핍근학정매양재불동배경온도시적도열계수。매양도열계수수배경온도승고이선성증대。
Based on the laboratory tests and the relation of the specific heat capacity with the ambient temperature,study was made on the heat conductivity coefficient of the loose coal at different ambient temperature through finite element numerical simulation and with the dichotomy. The results showed that when the volatile matter of coal samples was known,the specific heat capacity of the coal sample had a linear relation with ambient temperature. With the heat transfer model of coal samples,the heat conductivity coefficient was selected by the dichotomy, the numerical simulation results of the variation law of coal sample temperature with time were compared with the measured results, which was gradually close to the determination of the heat conductivity coefficient of coal samples at different ambient temperature. Heat conductivity coefficient of coal sample increased linearly with the increase of the ambient temperature.