Investigation of the role of non-uniform suction flow in the performance of water-jet pump
Investigation of the role of non-uniform suction flow in the performance of water-jet pump
复制标题
非均匀吸入流对喷水泵性能影响的研究
DOI：
10.1016/j.oceaneng.2017.05.034
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发表时间：
2017-08
影响因子：
5
通讯作者：
Zhang Xiang
中科院分区：
文献类型：
--
作者：
Cao Puyu;Wang Yang;Kang Can;Li Guidong;Zhang Xiang
对均匀和非均匀吸力流之间的性能偏差认识不足是喷水泵设计和应用中遇到的主要问题。本研究通过数值研究来说明性能偏差并解释其产生机理。通过稳态仿真，比较了两种不同计算域下泵的性能。一种是均匀入流条件下的单个喷水泵，另一种是非均匀入流条件下的完整喷水推进系统。结果表明，较大的吸流不均匀性导致泵扬程大幅度下降。全面讨论了系统中的流动细节，以描述不均匀流入。它的主要特征是在顶部附近有明显的涡流畸变，并演变成一个周向涡。旋涡和叶片载荷也进行了探讨。从而揭示了非均匀流入与性能偏差之间的内在联系。由于非均匀扰动，从轮毂处沿展向脱落的涡引发轮毂段叶片载荷急剧下降的峰值。此外，一个集中的旋涡偏离吸力面，导致叶冠部分叶片载荷的整体降低。这些显著减少的叶片负荷最终产生一个头部偏差。
Insufficient understanding of performance deviation between the uniform and non-uniform suction flows is a major problem encountered in the design and application of water-jet pumps. In this study, numerical investigation is conducted to illustrate the performance deviation and explain its generating mechanism. Steady simulations are performed to compare the pump performance with two different computational domains. One is a single water-jet pump under uniform inflow and the other is a complete water-jet propulsion system with non-uniform inflow. Results indicate that large non-uniformity of suction flow causes a substantial drop in the pump head. Flow details in the system are comprehensively discussed to describe the non-uniform inflow. Its primary feature is a distinct swirl distortion near the top which evolves into a circumferential vortex. Vortices and blade loadings are also explored. Consequently, the internal correlation between the non-uniform inflow and performance deviation is revealed. Due to non-uniform disturbances, a spanwise vortex shedding from the hub triggers a sharp downward peak of blade loading in the hub section. Moreover, a concentrated vortex deviates from the suction surface and induces an entire reduction in blade loading of the shroud section. These remarkable reductions in the blade loading eventually generate a head deviation.
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影响因子：
1.7
作者：
Furukawa, M;Inoue, M;Yamada, K
通讯作者：
Yamada, K
影响因子：
1.7
作者：
A. Zemp;A. Kammerer;R. Abhari
通讯作者：
A. Zemp;A. Kammerer;R. Abhari
DOI：
10.1243/0957650011538550
发表时间：
2001-01
期刊：
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
影响因子：
--
作者：
Yunbae Kim;A. Engeda;R. Aungier;Gregory L. Direnzi
通讯作者：
Yunbae Kim;A. Engeda;R. Aungier;Gregory L. Direnzi
影响因子：
8.2
作者：
N. Bulten
通讯作者：
N. Bulten
DOI：
10.1115/gt2007-27438
发表时间：
2007-11
期刊：
--
影响因子：
--
作者：
Yantao Yang;Hong Wu;Qiushi Li;Sheng Zhou;Jiezhi Wu
通讯作者：
Yantao Yang;Hong Wu;Qiushi Li;Sheng Zhou;Jiezhi Wu