空气比热容比的实验测量方法的比较探讨  

Comparison and Study on Measuring Air Specific Hear Ratio Experiment

作　　者：杨琴[1] 张海军[2] YANG Qin;ZHANG Haijun(School of Mathematics and Information Engineering,Jiaxing University,Jiaxing 314001,China;College of Mechanical and Electrical Engineering,Jiaxing 314001,China)

机构地区：[1]嘉兴学院数理与信息工程学院,浙江嘉兴314001 [2]嘉兴学院机电工程学院,浙江嘉兴314001

出　　处：《大学物理实验》2020年第6期47-50,共4页Physical Experiment of College

基　　金：嘉兴学院教改课题(2019A7-108);嘉兴学院教改课题:《控制工程基础》教学引入“雨课堂”混合教学模式的研究。

摘　　要：首先详细讨论了FB212型气体比热容比测定仪利用谐振动测量的空气比热容比的实验原理和方法,其次利用声速公式的理论推导,提出了用声速测量方法测空气比热容比的实验方法。最后将两种方法测得的结果进行了比较,结果表明,声速测量方法测得的空气比热容比误差比用FB212型空气比热容比测定仪测得的误差小,精度高。在此基础上,对实验过程中的实验现象进行了数学分析。Firstly the FB212 type air-specific heat ratio detector measurement method was discussed in detail.Then based on the theoretical derivation of the formula speed of sound,using sound velocity to measure air specific heat ratio was proposed.The two methods were compared.As a result,the sound velocity measure was more accurate.Some phenomena in the experiment were analyzed in a mathematical way.

关 键 词：空气比热容比 振动法 声速公式 相位比较 

分 类 号：O414.1[理学—理论物理]