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中文摘要：
为研究1000 MW级核电站用安全壳喷淋泵的热冲击特性,对热冲击作用下泵内部流场进行了数值计算。热冲击工况下泵内径向力逐渐变大,波动更为剧烈;轴向力逐渐变小;径向力和轴向力的波动趋势与常温工况的一致。将内流场模拟得到的热载荷及压力载荷加载到结构体上,分析热冲击下转子系统过流部件的温度分布,并分析其热应力与机械应力分布规律。结果表明：热应力对结构的破坏占主要作用;最大的热应力集中在轮毂上,最大的机械应力在轮毂与叶片的交界处;叶片上热应力和机械应力分布均满足叶根至叶顶依次减小的规律。
英文摘要：
In order to research thermal shock characteristics of the containment spray pump in a 1 000 MW nuclear power plant,the internal flow field of the containment spray pump under thermal shock was calculated numerically.The radial force becomes larger and larger gradually,the fluctuation of radial force is acute,and the axial force becomes smaller and smaller gradually.The fluctuation trends of the radial force and axial force under thermal shock are accorded to the forces in the normal isothermal condition.The temperature loadings which were solved by the internal flow field simulation and the pressure loadings were loaded on the pump＇s structure to analyze temperature distribution of the rotor system under thermal shock,and the rules of the thermal stress and mechanical stress distributions.The results show that the thermal stress is predominant destruction factor of the structure.The destruction of the structure caused bythermal stress focuses on the hub,but the mechanical stress destruction concentrates on the boundary of the hub and the vane.From the blade root to blade tip,the thermal stress and mechanical stress of impeller blade decrease gradually.
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