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在先进压水堆核电站的设计中将蒸汽发生器和主泵直接连接,取消了蒸汽发生器和主泵之间过渡段,并在蒸汽发生器下封头出口腔室设置了改进的出口挡板,使蒸汽发生器出口接管的流场变得十分复杂。因此对蒸汽发生器下封头/主泵连接处的流动特性进行了试验研究,进行了无挡板的风洞试验和有档板的水回路试验。研究表明采用自行设计的出口挡板可以消除出口接管的轴向回流,使出口流场均匀。
In the design of advanced PWR nuclear power station, the steam generator is directly connected with the main pump, the transition section between the steam generator and the main pump is canceled, and an improved exit baffle is arranged in the outlet chamber of the head of the steam generator , The flow field at the outlet of the steam generator becomes very complicated. Therefore, the flow characteristics of the lower head of the steam generator / the connection of the main pump were studied, and the wind tunnel test without baffles and the water circuit test with baffles were carried out. The research shows that the self-designed outlet baffle can eliminate the axial backflow of the outlet nozzle and make the outlet flow field uniform.