【摘要】 在 ２００ ＭＷ供热堆实验回路（ＨＲＴＬ－２０Ｑ）上，以水为工质，在压力 １． ０～４． ５ ＭＰａ，加 热功率 ２７～１９０ｋＷ，入口欠热度 ５～８０℃，加热段出口质量含汽率小于 ５％的实验参数范围（包 含了２００ＭＷ供热堆参数的运行工况），研究了加热功率对低压、低干度汽水两相自然循环系统 的循环流量、流量相对振幅、流量振荡周期等的影响。结果表明随加热功率的增加流量呈非线 性增加，振荡周期逐渐减小，最大流量相对振幅变化不大，发生流量振荡的冷却剂入口欠热度范 围向大欠热度方向移动。更多还原

【Abstract】 Using water as coolant, the effect of heating power on the flow rate, relative oscilatory amplitude and oscillatory period of flow rate in a natural circulation system with low pressure and low steam quality has been carried out on the test loop HRTL-200(heating reactor test loop). Test pressures ranged from 1. 0 to 2. 5 MPa,heating powers 27~ 190 kW, inlet subcoolings 5~80℃,and steam quality at the outlet of test section was less than 5% (the test conditions covered the parameters which were typical for 200 MW nuclear heating reactor). The experiment results showed that as the heating power increased the mass flow rate increased non-linearly, the oscillatory period decreased, the maximum relative oscilatory amplitude changed a little, and the subcooling region in which the flow was instable moved toward the direction of the larger subcooling value.更多还原