Study on the influence of the moonpool on the smooth water resistance performance of the ship

Zhang, Xiuyuan; Sun, Liping; Sun, Cong; Wang, Chao; Chen, Cheng

doi:10.1016/j.oceaneng.2021.109590

Cited by 11 publications

(1 citation statement)

References 13 publications

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“…Xu et al [1] carried out transient characteristics and internal flow characteristics of RCP under power failure were studied by numerical simulation method and the flow field analysis model of RCP was established, which revealed the flow characteristics in the RCP. Zhang et al [2] research and analysis of transient power-off accidents and numerical simulation characteristics of internal flow field of RCP under different moment of inertia, the influence of moment of inertia on idling of RCP is obtained. The calculation results show that the greater the moment of inertia of unit pump, the more favorable it is to reduce the consequences of the accident and improve the safety performance of the RCP.…”

Section: Introductionmentioning

confidence: 99%

Effects of guide vane angle on internal flows and vortex characteristic of reactor coolant pump passage under flow coastdown

Ye,

Wen,

Luo

et al. 2024

J. Phys.: Conf. Ser.

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In order to explore the effects of guide vane angle on internal flows of reactor coolant pump during flow coastdown, the law of vortex evolution and vortex intensity change in the impeller and guide vanes was analyzed. Based on the second generation vortex identification method: Q criterion, the unsteady evolution law and vortex intensity change of impeller guide vane during flow coastdown were analyzed by numerical simulation. The results show with the flow coastdown, fluctuation law of pressure and velocity in the impeller keeps consistent, while the pressure gradually approaches the outlet pressure and the speed decreases. When the vortex identification’s threshold value is Q=24000 s-2, the vortex area in impeller is small and vortex structure is clear. In a rotation period, the shape and area of vortex structure at the inlet with different guide vane angles are the same. The outlet’s vortex structure is affected by dynamic-static interference, resulting the vortex structure is the same but the vortex area is different. The law of guide vane placement angle changes from “convex-vortex” to “concave -vortex”, and vortex area decreases gradually. In the guide vane, horseshoe vortex is dominant, and structure of blocked vortex and shear layer decreases during flow coastdown.

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Section: Introductionmentioning

confidence: 99%