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针对卧式火管式蒸汽发生器的结构特点 ,对水平加热管束间的三维汽液两相流特性进行了实验研究。用单探头和三探头单纤光导探针分别测定了加热管束间的空泡份额分布和汽相速度分布。开发了三维汽液两相低雷诺数湍流漂移数学模型和相应的数值计算方法。为计算漂移数学模型中的汽相速度 ,综合考虑了重力和流体本身的加速作用对汽相漂移速度的影响 ,故该漂移数学模型可用于分析多维汽液两相流。计算结果与实验测量值符合良好 ,证明该数学模型是正确可靠的。
In view of the structural characteristics of horizontal fire tube steam generator, the characteristics of three-dimensional vapor-liquid two-phase flow between horizontal heated tube bundles were studied experimentally. The bubble volume distribution and vapor phase velocity distribution between the heating tubes were measured with single probe and three probe single fiber probe respectively. A three-dimensional low-Reynolds number turbulent drift mathematical model of vapor-liquid two-phase and corresponding numerical calculation method are developed. In order to calculate the vapor phase velocity in the drift mathematical model, the influence of gravity and the acceleration of the fluid itself on the vapor phase drift velocity is considered. Therefore, the drift mathematical model can be used to analyze the multi-dimensional vapor-liquid two-phase flow. The calculated results are in good agreement with the experimental measurements, which proves that the mathematical model is correct and reliable.