不同温度下空气比热容比测量装置的研究  

Investigation of experimental instrument measuring specific heat ratio of air at different temperatures

作　　者：常相辉[1] 冯先富[1] 张永文[1] 刘斌[1] 

机构地区：[1]西南交通大学物理科学与技术学院物理实验中心,四川成都610031

出　　处：《物理实验》2011年第4期21-23,共3页Physics Experimentation

基　　金：西南交通大学科技发展基金及实验教学与实验技术项目(2009-19);SRTP项目(091304)

摘　　要：针对大学物理实验现有测量空气比热容比装置存在的不足,研制了可测量不同温度下空气的比热容比的装置,包括贮气瓶、压力传感器、温度传感器及水浴系统.该装置可使贮气瓶内空气保持在30~90℃之间的任一温度.每隔10℃测量空气的比热容比值,实验结果表明空气比热容比随温度上升而下降.Due to the shortcomings of instrument that was used to measure the air specific heat ratio in physics experiments,a device to measure the air specific heat ratio under different temperatures was developed,which consisted of the air bottle,pressure sensors,temperature sensors and water bath system.The air could be stored at any temperature between 30 ℃ and 90 ℃.The air specific heat ratios were measured at 30 ℃~90 ℃ stepped by 10 ℃ in experiment,and a conclusion came that air specific heat ratio increased with the dropping temperature.

关 键 词：温度 空气 比热容比 

分 类 号：O551.3[理学—热学与物质分子运动论]