摘要
依据稳态圆筒壁法测量导热系数的原理 ,推导出颗粒导热系数测量公式 ,通过试验确定颗粒粒径、材料密度、材料温度与导热系数的关系。采用将细热电偶丝的两极拉成直线 ,直接固定在圆筒上下端面的测温方法 ,保持了物料中温度场的真实性。采用单片机简化了检测电路 ,减少了过多元件的器件噪音 ,系统的可靠性和稳定性高。
The equation for measuring thermal conductivity of particles is derived based on the principle of thermal conductivity measuring with steady cylinder method. A n d the relationship of thermal conductivity of particles to various parameters, s uch as radius, density, temperature is established by experimental data. The st r aightened compensative lead of thermocouple is settled to the side wall of the c ylinder, so the reality of the temperature field is ensured. The reliability an d stability of the measuring system is increased by using of the monolithic proce ssor in order for simplification of the detecting circuit and the noise suppress ion from excessive device.
出处
《有色金属》
CSCD
2004年第41期146-149,共4页
Nonferrous Metals
基金
国家自然科学基金资助项目 (5 96760 3 5 )
