Steady and Transient Pool Boiling CHF at Various Pressures in a Pool of Water

摘要：

The steady CHF data under saturated and subcooled conditions at various pressures for the subcoolings ranging from zero up to 40 K in a pool of water are described in comparison with conventional correlations such as Kutateladze and Zubersˇ one based on hydrodynamic instability. Those CHF were found to be switched to the ones resulting from another CHF mechanism. The transient CHF due to exponentially increasing heat inputs Q0exp(t/ 冧) with the e-folding time ( 冧) ranged from 20 s down to 10 ms at various pressures for the subcoolings ranging from zero up to 40 K were measured. Here, e-folding time is the time interval in which exponential heat input increases by a factor of e(∽2.71828). The Transient pool boiling CHF values for exponential e-folding time first increase with the decrease in e-folding time up to the maximum CHF then those decrease down to the minimum one and again increase with the decrease in e-folding time. The transient CHF values under various pressures for the e-folding times are separated into three groups in relation to exponential e-folding time respectively.

关键词： Transient Boiling Heat Transfer Critical Heat Flux Various Pressures Subcooling Pool Boiling

作者: Yantao Li Katsuya Fukuda Qiusheng Liu

作者单位: School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan Department of Marine Engineering, Kobe University, Kobe 658-0022, Japan

会议类型: 国际会议

会议名称: 4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)

会议地点: 广州

会议语种:英文

页码: 1-5

在线出版日期: 2012-01-06（万方平台首次上网日期，不代表论文的发表时间）