Influences of Rotational Speed and Flow Rate on Pressure Pulsations of a Rim-driven Axial Flow Pump

doi:10.3969/j.issn.1004-132X.2025.10.005

China Mechanical Engineering ›› 2025, Vol. 36 ›› Issue (10): 2198-2206.DOI: 10.3969/j.issn.1004-132X.2025.10.005

Influences of Rotational Speed and Flow Rate on Pressure Pulsations of a Rim-driven Axial Flow Pump

Mengjie CHEN¹(), Zhuo ZHANG², Wu OUYANG²^,³^,⁴(), Chenxing SHENG¹^,³^,⁴, Bao LIU²^,³^,⁴, Wei LIU⁵

^1.School of Naval Architecture，Ocean and Energy Power Engineering，Wuhan University of Technology，Wuhan，430063
^2.School of Transportation and Logistics Engineering，Wuhan University of Technology，Wuhan，430063
^3.State Key Laboratory of Maritime Technology and Safety，Wuhan University of Technology，Wuhan，430063
^4.National Engineering Research Center for Water Transport Safety，Wuhan University of Technology，Wuhan，430063
^5.China Ship Development and Design Center，Wuhan，430064

Received:2024-10-25 Online:2025-10-25 Published:2025-11-05
Contact: Wu OUYANG

转速和流量对轮缘驱动轴流泵压力脉动的影响

陈孟杰¹(), 张琢², 欧阳武²^,³^,⁴(), 盛晨兴¹^,³^,⁴, 刘报²^,³^,⁴, 刘伟⁵

^1.武汉理工大学船海与能源动力工程学院, 武汉, 430063
^2.武汉理工大学交通与物流工程学院, 武汉, 430063
^3.武汉理工大学水路交通控制全国重点实验室, 武汉, 430063
^4.武汉理工大学国家水运安全工程技术研究中心可靠性与新能源研究所, 武汉, 430063
^5.中国舰船研究中心, 武汉, 430064

通讯作者: 欧阳武
作者简介:陈孟杰，女，2000年生，硕士研究生。研究方向为绿色高效推进技术。E-mail：cccmagic@qq.com
欧阳武^*（通信作者），男，1987年生，教授、博士研究生导师。研究方向为绿色高效推进技术及推进系统摩擦与润滑技术。E-mail：ouyangw@whut.edu.cn。
基金资助:
国家重点研发计划(2022YFB4300802)

Abstract

Abstract:

A novel RDP generated pressure pulsations during operations， which might negatively impact pump performance and system stability. The numerical simulation was employed to analyze the external characteristics and internal flow patterns of RDP under different rotational speeds and flow conditions. Utilizing POD， the main energy modes were extracted through spatiotemporal feature decomposition to investigate the influences of rotational speed and flow rate on the pressure pulsation at the trailing edges of the impeller blades， revealing the relationship between nonlinear dynamics and fluid-structure interaction phenomena. The results show that each rotational speed corresponds to a distinct optimal operating point， with the optimal point shifting towards lower flow rates as the rotational speed decreases. Moreover， the pressure pulsations are predominantly governed by nonlinear dynamics behavior， with nonlinear interaction effects between the impeller blades and guide vanes becoming more pronounced at lower rotational speeds and higher flow rates.

Key words: rim-driven axial flow pump（RDP）, pressure pulsation, proper orthogonal decomposition （POD）, rotor-stator interaction, rotational speed, flow rate

摘要：

新型轮缘驱动轴流泵（RDP）在运行过程中存在压力脉动现象，影响泵的运行性能和系统稳定性。采用数值模拟方法分析了不同转速和流量工况下RDP的外特性与内部流动特性。结合本征正交分解（POD）方法，通过时空特征分解提取主要能量模态，研究了转速和流量对叶轮叶片尾缘压力脉动的影响，揭示了非线性效应与动静干涉现象之间的关系。研究结果表明，不同转速对应不同最佳工况点，随着转速的降低，RDP的最佳工况点向低流量方向偏移；压力脉动主要受非线性动力学行为影响，叶轮叶片和导叶叶片之间的非线性干涉效应在低转速和大流量工况下更加显著。

关键词: 轮缘驱动轴流泵, 压力脉动, 本征正交分解, 动静干涉, 转速, 流量

CLC Number:

U664.58

Mengjie CHEN, Zhuo ZHANG, Wu OUYANG, Chenxing SHENG, Bao LIU, Wei LIU. Influences of Rotational Speed and Flow Rate on Pressure Pulsations of a Rim-driven Axial Flow Pump[J]. China Mechanical Engineering, 2025, 36(10): 2198-2206.

陈孟杰, 张琢, 欧阳武, 盛晨兴, 刘报, 刘伟. 转速和流量对轮缘驱动轴流泵压力脉动的影响[J]. 中国机械工程, 2025, 36(10): 2198-2206.

Figures/Tables 16

Fig.1 Schematic diagram of RDP structure

Tab.1 Key design parameters of the RDP

参数	数值	参数	数值
叶轮叶片数z_i	4	额定流量q_e	450 m³/h
导叶叶片数z_g	7	额定转速n_e	1450 r/min
叶轮直径D	0.2 m	额定扬程H_e	3.4 m
轮毂比d	0.5	额定功率P_e	7.5 kW
定转子间隙δ	2 mm

Fig.2 Test bench diagram

Fig.3 Computational domain decomposition

Fig.4 Grid distribution

Fig.5 Results of grid independence analysis

Fig.6 Validity analysis of numerical models

Fig.7 RDP performance curve

Fig.8 Schematic of the blade trailing edge

Fig.9 Energy distribution corresponding to the first 10 modes

Fig.10 Spectral distribution of the first three spatial modes

Fig.11 Time coefficient variation of the first mode

Fig.12 Pressure contour map of RDP along the

Fig.13 Velocity vector field on the axial cross-section of RDP

Fig.14 Schematic of the axial velocity cross-section

Fig.15 Axial velocity contour map at the trailing edge of RDP impeller blades

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Influences of Rotational Speed and Flow Rate on Pressure Pulsations of a Rim-driven Axial Flow Pump

转速和流量对轮缘驱动轴流泵压力脉动的影响

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