摘要
本实验使用热线法测量气体的热导率,主要研究气体流量大小对气体热导率测量结果的影响。实验结果表明,测量误差随着气体流量增加而增加,而所需要的测量时间随着气体流量增加而减小。从测量误差和学生课时两方面综合考虑,最佳的气体流量大小是13 ml/min至20 ml/min之间。
In this experiment,the thermal conductivity of gas was measured by hot wire method,and the influences of the gas flow on the measurement errors and the experiment time are mainly studied.The optimum flow rate is studied from several aspects ,such as the test time and the percentage difference of the experiment.The experimental results show that the measurement error increases with the increase of gas flow, and the required measurement time decreases with the increase of gas flow. Considering the measurement error and the students＇ class time, the optimum gas flow rates are between 13 ml/min and 20 ml/min.
作者
周勇
胡伟利
刘伯堂
李雪梅
ZHONG Yong;HU Wei-li;LIU Bo-tang;LI Xue-mei(Zhejiang Ocean University,Zhejiang Zhoushan 316022)
出处
《大学物理实验》
2018年第5期36-38,共3页
Physical Experiment of College
基金
浙江海洋大学大学生科技创新项目
浙江省自然科学基金资助(LQ16A050001)
广西自然科学基金资助(2014GXNSFAA118008)
关键词
热线法
气体热导率
气体流量
测量误差
hot wire
thermal conductivity of gas
gas flow
measurement error
