Contrast Analysis of Thermal-Hydraulic Qualities of Helical Tube Steam Generator between One and Two Dimensional Models
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摘要: 充分研究了国内、外对螺旋管蒸汽发生器内流动工质的热工水力特性所做的实验与理论研究,针对清华大学核能技术设计研究院建造的10MW高温气冷堆中所采用的小螺旋管式蒸汽发生器,提出了计算二维模型,并与一维模型计算结果及实验结果进行了对比验证。一维模型方程简单,计算方便,但目前针对螺旋管,尤其是小螺旋管的结构关系式还不充分,需要根据实验进行修正;二维模型可以更好地模拟流场实际情况,直接采用直管结构关系式,计算误差在10%以内,动态计算结果较好地描述了功率等因素对系统稳定性的影响。Abstract: Based on the study of theoretical and experimental research on thermal-hydraulic qualities of fluid in helical tube steam generator in the world, two-dimensional model is proposed for generator used in high-temperature gas cooling reactor （HTR-10） in this paper, and the results are compared with experiment results and results from one-dimensional model. The equations in one-dimensional model are simple, and calculation is convenient, yet the empirical formula for helical tube, especially for small banding radius helical tube are not sufficient, and so modification based on the experiments is necessary. Fluid field can be simulated better on two-dimensional model, and the empirical formula for straight tube can be used directly, the calculation error are within 10%, and the effect of power and inlet throttle for system stable can be described by the results of dynamic program.
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