矩形窄缝通道轴向非均匀加热临界热流密度实验研究

Test of Critical Heat Flux with Non-Uniform Axial Power Shapes in Rectangle Narrow Channel

对矩形窄缝通道轴向非均匀加热临界热流密度进行了研究。轴向加热方式为光滑的截尾余弦型,流动工质为去离子水。实验结果证明轴向非均匀加热临界热流密度低于轴向均匀加热临界热流密度。实验数据分析采用"F修正因子法",得到了轴向非均匀修正因子的半经验关系式。将该修正因子关系式同国际上已有的各种修正因子进行了比较分析,证明本文得到的修正因子预测的矩形窄缝通道轴向非均匀加热临界热流密度值更准确。

Critical heat flux for axial non-uniform heat flux distribution in rectangle narrow channel was studied in this report. During the test, electric heating were adopted, and the axial direction power loaded were truncation cosine distribution. The de-ionized water was heated. The test result indicated that CHF with non-uniform axial heat flux distribution was lower than CHF with uniform axial heat flux distribution. A correction factor was used to analyze the test data. The semi-empirical relation of correction factor of CHF with axial non-uniform heat flux distribution had been obtained. Comparing to the existing correction factor mod- els, it revealed that the proposed semi-empirical relation predictive CHF with axial non-uniform heat flux distribution in rectangle narrow channel was most accurate.