Numerical Investigation of the Impact of SES-Waterjet Interactions and Flow Non-uniformity on Pump Performance
Numerical Investigation of the Impact of SES-Waterjet Interactions and Flow Non-uniformity on Pump Performance
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发表时间：
2011
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通讯作者：
Y. L. Young;B. R. Savander;M. Kramer
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作者：
Y. L. Young;B. R. Savander;M. Kramer
本文的目的是研究SES水射流相互作用和流量不均匀性对泵性能的影响，通过完全耦合的计算流体动力学（CFD）模拟。重点是非设计条件，如接近驼峰速度。CFD求解器首先通过比较数值预测与模型规模的实验测量的水射流和SES作为单独的组件进行验证，然后介绍SES水射流系统的全尺寸响应的结果。结果表明，在入口处和整个水射流高度不均匀的流动。预测的轴向速度等值线内的水射流是在良好的一般协议与发表的实验研究船体水射流相互作用。目前正在进行的工作是扩大建模工作，以考虑浅水和柔性密封件对耦合SES-喷水推进响应的影响，以及由此产生的水流不均匀性对喷水推进系统水弹性响应的影响。
The objective of this paper is to investigate the impact of SES-waterjet interactions and flow non-uniformity on pump performance via fully coupled computational fluid dynamics (CFD) simulations. The focus is on off-design conditions, such as near the hump speed. The CFD solver is first validated by comparing the numerical predictions with model-scale experimental measurements of a waterjet and an SES as separate components, followed by presentation of results for the full-scale response of an SES-waterjet system. The results show highly non-uniform flow at the inlet and throughout the waterjet. The predicted axial velocity contours inside the waterjet are in good general agreement with published experimental studies of hull-waterjet interactions. Work is currently underway to extend the modeling effort to consider the effect of shallow water and flexible seals on the coupled SES-waterjet response, and the resultant impact of flow non-uniformity on the hydroelastic response of the waterjet propulsion system.