大学物理 ›› 2005, Vol. 24 ›› Issue (9): 61-61.

• 著者文摘 • 上一篇    

对测量气体热导率实验中压强影响的分析

何晓晓 邵鹏 钱广锐 苏为宁 于瑶   

  1. 南京大学物理系,江苏南京,210093
  • 出版日期:2005-09-25 发布日期:2005-09-20

The effect of pressure in the experiment measuring heat conductivity of air

  • Online:2005-09-25 Published:2005-09-20

摘要: 在测量气体热导率的实验中,发现气压在0.133~1.33kPa内1/Q和1/p并不完全符合线性关系,分析发现这是由于分子定向运动所致.随着测量室内气压的升高,测量室内气体分子温度也随之升高,当p>1.33kPa时,1/Q再次偏离1/p的一次函数关系.

关键词: 热丝法, 热导率, 传导, 对流, 准静态过程

Abstract: In the experiment measuring heat conductivity of air, We find that the 1/Q is not always linear dependent with lip in the range of 0. 133--1.33 kPa. This derives from the effect of the airflow. As soon as the air pressure increases the temperature rises. While p p〉 1. 33 kPa, 1/Q is in departure from linear with 1/ p again.

Key words: hot line method, heat conductivity, heat conduction, airflow, quasi-statlc process

中图分类号: 

  • O551.3