【摘要】 用热块技术对低压、低质量流速下垂直环形通道中水的过渡沸腾传热进行实验研究，实验范围是：压力Ｐ＝２．５－１０．９ｂａｒ，质量流速Ｇ＝７４．２－２２３．９ｋｇ／ｍ２ｓ，进口过冷度△Ｔｓｕｂ＝５．５－３２．４℃。用一维和二维模型对实验数据分析处理，得到许多不同工况下的过渡沸腾曲线，并对影响过渡沸腾传热的主要因素进行了分析。实验发现，管壁的热流密度值在过渡沸腾区域有较大波动，表明过渡沸腾这种传热方式所固有的不稳定性。得到了一个预测过渡沸腾传热的公式，并和其他关系式进行了比较。更多还原

【Abstract】 Using the hot patch technic, an experimental study of transition boiling heat transfer in vertical annulus at low pressure and mass flux has been carried out. The experimental ranges were:P= 2 . 476 - 10 . 904 bar; G = 74 . 17 - 223 . 93 kg/m2s; △Tsub = 5 . 5 - 32 . 4℃ . An one - dimensional model and two - dimensional model was adopt to handle experimental data. Many beiling curves under different condition have been obtained. And the factor which affect transition boiling heat transfer were also analysed . The experiment indicates that the heat flux of the wall can flucture considerably. This confirmed the inherent unstability of transition boiling. In this paper, a predicting correlation on transition boiling heat transfer was obtained. And comparison with other correlation was also introduced.更多还原