端部周期加热下管内气温奇异分布的实验研究  

EXPERIMENTAL STUDY ON SINGULAR TEMPERATURE PROFILES IN A TUBE TO PERIODICAL HEATING AT END

作　　者：张小波[1] 刘继平[1] 王凯[1] 严俊杰[1] 胡党辉 

机构地区：[1]西安交通大学动力工程与多相流重点实验室,陕西西安710049 [2]陕西银河榆林发电有限公司,陕西榆林719000

出　　处：《工程热物理学报》2011年第2期281-283,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50506024);教育部新世纪人才支持计划(No.NCET-08-0441)

摘　　要：设计搭建了端部周期加热时管内气体热声对流的实验平台,对端部周期加热引起的气体热声对流作用下管内气体的温度分布进行了实验研究。该实验以氩气为工质,利用三极管控制加热电路实现周期性加热;测量了不同加热频率下管内的气体温度,并与常热流加热时的温度分布进行对比,结果表明端部周期加热时管内气体的温度分布与同功率下常热流加热时存在明显的差异,并且在某些测点出现了温度的奇异分布。本实验验证了超温现象的存在,为管内气体热声对流现象的进一步研究奠定了基础。The temperature profiles of thermoacouistic convection in a tube under periodical heating at end were investigated experimentally. The periodical heating system was controlled by a triode and the heating frequency could be adjusted by altering the signal of the signal source. Argon was used as working substance; its temperature in every heating frequency was measured and compared to the value under the condition of continuous heating. The results showed that excess temperature existed at every measuring point because of thermoacoustie waves propagating in the tube, singular temperature distributions appeared at some measuring points. These results verified the existence of excess temperature experimentally, could lay foundations for the further study of the thermal effect of thermoaeoustic waves.

关 键 词：热声波 周期性加热 超温 

分 类 号：TK124[动力工程及工程热物理—工程热物理]