海洋条件下U型管蒸汽发生器传热管倒流特性研究
doi: 10.13832/j.jnpe.2021.03.0037
Investigation on Reversed Flow Characteristics of U-Tube Steam Generator under Ocean Conditions
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摘要:
对海洋条件下U型管蒸汽发生器(SG)传热管倒流特性进行研究,以RELAP5程序为基础,建立了典型海洋条件的动态仿真模型并验证了模型的正确性。针对反应堆启堆阶段,研究了不同的摇摆条件对低流量强迫循环工况下SG内 U型管内流动的影响。结果表明:强迫循环开始后持续的时间越长再引入海洋条件后越不易发生倒流;绕与SG管束弯管轴线平行的轴线摇摆更容易发生倒流。
Abstract: Based on RELAP5 program, a dynamic simulation model of U-tube steam generator (SG) under typical ocean conditions is established and verified. In the reactor start-up period, the effect of different rolling conditions on the flow in the U-tube of SG under low flow forced cycle condition is studied. The results show that the reversed flow can be suppressed by delaying the introduction of ocean conditions. It is easier to reverse flow under rolling motion condition around the axis that parallel to the axis of SG tube bundle elbow.-
Key words:
- Steam generator (SG) /
- Forced circulation /
- Thermalhydraulics /
- Flow instability
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