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以水为工质 ,在常压下对垂直和倾斜环隙流道内的自然对流沸腾临界热负荷进行了实验研究和理论分析 ,得到了计及进出口局部阻力的计算公式 ,讨论了流道几何尺寸、几何形状、倾角、压力和进出口局部阻力等因素对临界热负荷的影响 ,最后提出了一个新的 ,可用于计算竖直环隙、圆管及长方形流道内自然对流沸腾临界热负荷的半经验公式 ,其计算精度和适用范围较现有的计算公式有显著提高 ,原则上不受H/De 值大小的限制。
Using water as the working fluid, the experimental study and theoretical analysis of the natural convection boiling critical heat load in the vertical and inclined annular channel were carried out at atmospheric pressure. The formulas for calculating the partial resistance of inlet and outlet were obtained. Size, geometry, dip angle, pressure and local resistance of inlet and outlet to the critical heat load. Finally, a new method is proposed to calculate the critical heat load of natural convection boiling in vertical annulus, circular pipe and rectangular flow channel Semi-empirical formula, the calculation accuracy and scope of application than the existing formula has significantly improved, in principle, not subject to the size of the H / De limit.