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实验研究了低压低干度汽水两相混合物在自然循环条件下产生密度波不稳定性时的流量振荡特性。实验在大型热工水力学实验回路ＨＲＴＬ－２００上以水为工质进行，压力为１．０—４．０ＭＰａ，加热功率为２７—１９０ｋＷ，人口欠热度为５—８０℃，加热段出口质量含汽率小于５％。实验参数范围包括了２００ＭＷ核供热堆微沸腾工况运行的参数。获得了有关自然循环流量振荡模式、相对振幅、振荡周期等振荡特性参数随系统压力、加热功率和冷却剂入口欠热度等热工参数变化的实验结果
The experimental results show that the flow oscillation characteristics of two-phase mixture of low-pressure and low-dryness soda and water under natural circulation condition produce density wave instability. Experiments in the large thermal hydraulics experimental loop HRTL-200 with water as working fluid, the pressure of 1.0-4.0MPa, heating power of 27-190kW, the population owes heat is 5-80 ℃, the heating section of the export quality Steam content of less than 5%. The experimental parameters include the parameters of the micro-boiling operation of a 200MW nuclear reactor. The experimental results about the change of oscillation parameters such as natural circulation flow oscillation mode, relative amplitude and oscillation period with the change of thermal parameters such as system pressure, heating power and underheat of coolant inlet were obtained