【摘要】 根据一维自然循环比例分析理论模型推导的试验装置与实际电站热工水力特性的相似准则,对整体性能试验装置主要参数的确定方法进行了深入讨论。结果表明:采用小尺度、等压力、同工质的实验装置模拟实际系统自然循环现象更为准确实际,单相和两相自然循环比例准则可同时满足,不存在复杂比例变化带来的失真,不利因素是试验成本偏高。同工质非等物性(不等压)模拟能够降低试验成本,但比例参数不能满足从单相自然循环到两相自然循环的平滑过渡。如保持功率连续,其速度比和特征时间比会有所差异。更多还原

【Abstract】 Based on the similarity criteria derived in theoretical model in scaling analysis for one-dimensional natural circulation,the methodology to determine the characteristics parameters of an integral facility was discussed.The results show that it is more reasonable to simulate the natural circulation phenomena using an integral facility of smallscaled,same pressure,and same working fluid.Both the similarity criteria of singlephase and two-phase natural circulation can be preserved and there is no obvious scaling distortion due to the transition of the scaling ratios.However,the cost of this kind of facility will be high.If using low-pressure facility to simulate high-pressure phenomena, the cost will be lower,and the test can be carried out more easily.But the transition of some scaling ratios from single-phase to two-phase natural circulation will not be smooth.For example,if keeping the same power ratio,the velocity ratio and the time ratio will be different.更多还原