绝热膨胀法测量空气比热容比实验的探讨  

Experiment of air specific heat capacity ratio using adiabatic expansion method

作　　者：李宏康 孙国川 邱菊 薛红玲 LI Hong-kanga, SUN Guo-chuana, QIU Jub, XUE Hong-lingb(a. College of Architecture and Civil Engineering; b. College of Applied Sciences, Beijing University of Technology, Beijing 100022, Chin)

机构地区：[1]北京工业大学建筑工程学院,北京100022 [2]北京工业大学应用数理学院,北京100022

出　　处：《物理实验》2018年第8期51-55,共5页Physics Experimentation

摘　　要：绝热膨胀法测量空气比热容比实验,通过实验探讨听声与看压差关阀门、放气时间、充气压差值、是否安装隔热装置对实验的影响.发现对测量结果影响主要来自于"绝热膨胀"过程的实现和测量.通过减少该过程的热传递,并调整充气压差延缓绝热过程的持续时间,能够有效地提高测量结果的准确性.The air specific heat capacity ratio was measured by adiabatic expansion method.The influence of the listening sound,the time of air release,the air pressure difference and the installation of the insulation device were investigated experimentally.The analysis showed that the main influence on the measurement came from the process of the adiabatic expansion and the detection.By reducing thermal transmission within the adiabatic expansion process and adjusting air inflation pressure difference to delay the duration time of adiabatic process,the accuracy of the measuring result was enhanced.

关 键 词：比热容比 压差 绝热膨胀 空气 

分 类 号：O551.3[理学—热学与物质分子运动论]