加热系统间歇泉流动现象初步实验研究

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基金项目:

高等学校博士学科点专项科研基金资助课题(20090073110034)

Preliminary Experimental Study on Geysering Phenomena in Heating System

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

摘要: 开展了各组合工况(不同竖直段长度、不同竖直段直径和不同加热功率)下的间歇泉流动实验,对实验现象和实验数据进行分析。结果表明,在间歇泉流动中,系统内的液体会周期性地沸腾,且多种流动形态循环出现;液体的冷却回流过程中会产生较大的温度和压力变化;加大竖直段长度、减小竖直段管径更有利于形成间歇泉流动,加大加热功率将使得间歇泉流动更加明显,其他系统相关参数对间歇泉流动的影响需要作进一步研究。
- 间歇泉 /
- 周期性沸腾 /
- 自然循环
Abstract: The geysering phenomena is studied experimentally under several cases with different height of upper plenum,diameter of vertical column and heating power,to investigate the effects on the geysering phenomenon.According to the analysis of experimental phenomenon and data,it is found that the liquid pe-riodically boils and various flow patterns alternately occur in the heating system.The refilling of cooler liquid causes significant change of temperature and pressure in the system.The geysering phenomena is more obvi-ous under greater height of upper plenum,less diameter of vertical column and greater heating power.The effect of other system parameters on geysering requires further study in the future work.
- Geysering /
- Periodical boiling /
- Natural circulation