雷诺实验的创新性教学  

Innovative teaching of Reynolds experiment

作　　者：曹桂萍[1] 孙杰[1] 潘亮[1] 闫亭亭[1] 

机构地区：[1]常州工学院化工系,江苏常州213022

出　　处：《高师理科学刊》2011年第2期110-112,共3页Journal of Science of Teachers＇College and University

基　　金：常州工学院重点课程建设项目(J080148);常州工学院精品课程(J100710)

摘　　要：针对雷诺实验传统教学方法的缺陷,从临界速度测定后设法观察导管内层流和湍流的速度分布图,使用稀KMnO4溶液代替红墨水作示踪剂,清洗体系残留的示踪剂等3个方面对教学进行创新性改革.实验结果表明,通过调整操作方法能够观察到层流和湍流的速度分布图,0.01 mol/L KMnO4溶液适宜作示踪剂,用草酸钠和3 mol/L硫酸配制的清洗剂能有效去除残留示踪剂的影响.通过创新性教学改革,有助于调动学生的学习主动性,培养学生的创新能力和综合素质.To overcome the shortcomings of traditional teaching methods for Reynolds experiment,innovative teaching reforms are made in the three aspects as following,velocity distribution diagram of laminar flow and turbulent flow must be observed in the duct after the critical velocity of laminar flow and turbulent flow is determined,dilute KMnO4 solution is used as a tracer instead of red ink in the experiment,and the residual tracer in the system must be cleaned out.Experimental results show that velocity distribution diagram of laminar flow and turbulent flow can be observed by adjusting the operation method,0.01 mol/L KMnO4 solution is suitable for the tracer in the Reynolds experiment,and the cleaning agent,which is made of sodium oxalate and 3 mol/L sulfuric acid,can remove the residual tracer effectively.The innovative teaching reforms help the students to mobilize their motivation to learn,and cultivate students’innovation capability and overall quality.

关 键 词：雷诺实验 速度分布图 示踪剂 清洗剂 

分 类 号：TQ02[化学工程] G642.423[文化科学—高等教育学]