碳钢-水热虹吸管内部强化沸腾换热

研究了分流管结构对碳钢－水热虹吸管蒸发段内沸腾换热的影响,选择７种不同结构的分流管进行大量的实验和理论研究。结果表明：分流管结构尺寸对蒸发段沸腾换热有很大的影响,在相同的传输功率下,分流管的开孔率在３３％左右、管间隙在４．５ｍｍ左右强化沸腾换热的效果最佳,沸腾换热系数大约提高２～３倍。综合了大量试验数据利用多元线性回归分析整理出分流管强化沸腾换热的准则方程式。

STUDY OF INTERNAL ENHANCING BOILING HEAT TRANSFER MECHANISM OF CONCENTRIC PERFORATED PIPE IN THERMOSYPHON

Seven invariable structures of perforated pipes were studied. The results showed that structures of perforated pipe have been significant influence on the boiling heat transfer. In the some rang of the heat flux density, the optimized boiling heat transfer is achieved when the perforated pipe is about 33%, and the tube gap is about 4.5 mm. The boiling heat transfer correlation is increased by 2-3 times. The equation for an enhancing boiling heat transfer is obtained by multiparameter of a large amount of experimental data. The experimental results agree well with the regressive equation.