为研究不同工况下喷水推进泵的内流性能，以轴流式喷水推进泵为研究对象，运用Ansys18.2流体计算软件模拟了不同转速和不同航速下喷水推进泵内的内流场，分析了喷水推进泵的转速和航速变化对其能量特性和内部流动的影响。数值计算结果表明：喷水推进泵的推力与航速呈负相关，与转速呈正相关；随着船舶航速的增大，喷水推进泵进水流道内的流速逐渐增大，叶轮进口速度的高速区面积有所增大，导叶出口速度分布的周期性逐渐减弱；随着转速的增加，叶轮进口处更容易发生空化，导叶出口压力上升，速度增大；喷水推进泵进水流道的唇部区域存在小范围的高压区，且航速越高，转速越低，该区域面积越大。
In order to study the performance of water jet pump under different working conditions, the axial flow water jet pump as the research object, the internal flow field of water jet pump under different rotation speeds and ship speeds was simulated and analyzed by using Ansys 18.2. The effects of rotation speeds and ship speeds on its external characteristics and internal flow performance are analyzed. The results show that the thrust of water jet pump is positively correlated with rotation speeds and negatively correlated with ship speeds; With the increase of ship speed, the flow velocity in the water jet pump increases, the range of high-speed zone increases, and the periodicity of diffuser outlet decreases gradually; With the increase of rotation speed, cavitation is more likely to occur at the impeller inlet, the pressure at the diffuser outlet increases and the speed increases; There is a local high pressure area in the pressure distribution of propulsion pump. The higher rotation speed, the smaller the range of the high pressure area, and the higher ship speed, the high pressure area is opposite.
2021,43(12): 88-93 收稿日期：2020-08-31
DOI：10.3404/j.issn.1672-7649.2021.12.016
分类号：U664.34;S277.9
基金项目：国家自然科学基金资助项目（51779108）
作者简介：李明慧(1996-),女,硕士研究生,研究方向为喷水推进泵的性能优化
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