This paper describes the experimental study of twophase density wave oscillation in natural circulation loop. The oscillation curves under different conditions are obtained.
在自然循环水回路上进行了两相流密度波不稳定性的实验研究，得到了不同工况下的实时脉动曲线。
2
Furthermore, the results based on different models are compared, which may provide some references for the practical design and operation of twophase natural circulation loop.
并将结果与漂移模型计算结果进行比较，结果可为两相自然循环回路设计、运行提供参考。
3
We have mainly researched two FM signal demodulation techniques called Frequency Spectrum Separation and Phase Lock Loop in the first part.