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自然循环载热系统由密度差引起的重位压差驱动,驱动压头小且受冷热源位置和冷热流体温度影响,因此摇摆等海洋工况会对自然循环载热系统的载热能力产生较大影响。在固连坐标系内,采用理论分析和数值计算方法对自然循环载热系统的流量及载热能力进行了研究。理论分析给出了摇摆产生的各项附加力对自然循环载热系统的流量及载热能力的影响机理,并得到了摇摆条件下自然循环系统流量的常微分控制方程。数值计算方法中针对动量方程添加了由于摇摆产生的各种附加作用力项。数值计算得到的系统流量波动结果与理论分析结果吻合得很好,并且数值计算还给出了由于摇摆使系统载热能力下降的幅度。
Natural circulation heat transfer system driven by the density difference caused by the re-positioning differential pressure, driving a small head and cold and hot by the location of cold fluid temperature and fluid temperature, so swing and other ocean conditions will heat transfer system of natural circulation capacity Have a greater impact. In the solid coordinate system, the theoretical analysis and numerical calculation are used to study the flow and heat transfer capacity of the natural circulation heating system. The theoretical analysis shows the influence mechanism of various additional forces generated by the rocking on the flow and heat carrying capacity of the natural circulation heat transfer system and obtains the ordinary differential flow control equations of the natural circulation system under the rocking conditions. In the numerical method, various additional force terms due to rocking are added to the momentum equation. Numerical results show that the system flow fluctuation is in good agreement with the theoretical analysis, and the numerical calculation also gives the magnitude of the system heat load drop due to the rocking.