悬浮叶轮对旋涡泵内流特性及轴向力的影响研究

doi:10.3901/JME.2024.14.378

摘要/Abstract

摘要： 设计三种进出口轴向间隙厚度不同的旋涡泵模型(C1J3、C1J1和C3J1)，采用SST k-ω湍流模型对悬浮叶轮式旋涡泵内部流动进行数值模拟，计算叶轮悬浮在不同轴向位置时旋涡泵的外特性和全三维流场，探讨旋涡泵各部件的压力分布特点和质量交换机理，并进一步揭示悬浮叶轮所受轴向力的变化规律。结果表明，三个模型中泵壳流道和轴向间隙内的压力增长模式一致，均从流动发展区逐渐过渡到流动发展加速区再进入阻隔面区域。流动发展区内流体流动尚不稳定，发展加速区内叶轮和泵壳流道内流体的交换流动稳定而充分，而阻隔面区内压力剧烈变化以阻止液体泄漏。与轴向间隙厚度相同的泵模型C1J1相比，模型C1J3和C3J1的扬程和水力效率较低，且受叶轮偏离影响，叶轮和泵壳流道内流体的能量交换强度相对较弱，各部件内监测点的压力增速也较为缓慢。此外，叶轮所受轴向力与叶轮悬浮位置有关，且有偏向轴向间隙厚度较大方向的趋势。

关键词: 悬浮叶轮式旋涡泵, 内流特性, 能量交换, 轴向力, 间隙厚度

Abstract: Three regenerative flow pumps with floating impeller(RFP), different in the thickness of inlet/outlet axial clearance, are designed. The SST k-ω turbulence model is employed in the numerical simulation of RFP’s inner flow characteristics. The external characteristics and full three-dimensional flow field of RFP with the impeller floating in different axial positions are calculated. The pressure distribution characteristics in each component and mass exchange mechanism in RFP are discussed, and the varying rules of the axial force exerting on the floating impeller is further revealed. The results show that the growth pattern of pressure in pump channel and axial clearance are consistent in three pump models, where the fluid flows from the flow development region to flow acceleration region and then enters into the stripper region. The flow in development region is not stable, but in acceleration region, the exchange flow between the impeller and channel is stable and sufficient. Besides, in stripper region, the flow pressure changes rapidly to prevent the flow leakage. Compared with the pump model C1J1 taking equal clearance thickness, the head and hydraulic efficiency of pump models C1J3 and C3J1 are relatively lower. Under the effect of the impeller deviation, the intensity of energy exchange between the impeller and channel is weaker, and the pressure growth rate on the monitoring points of each component is comparatively slow. Additionally, the axial force of impeller is related to the impeller’s floating position, and the impeller tends to deviate to the direction with larger thickness of axial clearance.

Key words: regenerative flow pump with floating impeller, inner flow characteristics, energy exchange, axial force, clearance thickness

中图分类号:

TH314

李倩倩, 汤德利, 葛检, 陆怡, 别锋锋, 朱晓渠. 悬浮叶轮对旋涡泵内流特性及轴向力的影响研究[J]. 机械工程学报, 2024, 60(14): 378-386.

LI Qianqian, TANG Deli, GE Jian, LU Yi, BIE Fengfeng, ZHU Xiaoqu. Effect of Floating Impeller on the Inner Flow Characteristics and Axial Force in Regenerative Flow Pump[J]. Journal of Mechanical Engineering, 2024, 60(14): 378-386.

参考文献

[1] ZHANG Fan，ADU-POKU K A，HU Bo，et al. Flow theory in the side chambers of the radial pumps：A review[J]. Physics of Fluids，2020，32(4)：041301.
[2] APPIAH D，ZHANG Fan，et al. Effect of geometrical conditions on the performance of a side channel pump: A review[J]. International Journal of Energy Research，2018，42(2)：416-428.
[3] ZHANG Fan，APPIAH D，ZHANG Jinfeng，et al. Transient flow characterization in energy conversion of a side channel pump under different blade suction angles[J]. Energy，2018，161：635-648.
[4] SHIRINOV A，OBERBECK S. High vacuum side channel pump working against atmosphere[J]. Vacuum，2011，85(12)：1174-1177.
[5] 张帆，魏雪园，陈轲，等. 带凸形叶片侧流道泵内部旋涡特性研究[J]. 农业机械学报，2020，51(3)：115-122. ZHANG Fan，WEI Xueyuan，CHEN Ke，et al. Internal vortex characteristics of side channel pump with convex blade[J]. Transactions of the Chinese Society for Agricultural Machinery，2020，51(3)：115-122.
[6] 张露，武鹏，吴大转，等. 燃油系统旋涡泵压力脉动的控制研究[J]. 工程设计学报，2017，24(4)：395-402. ZHANG Lu，WU Peng，WU Dazhuan，et al. Study on pressure fluctuation control of a regenerative pump for fuel system[J]. Chinese Journal of Engineering Design，2017，24(4)：395-402.
[7] 张帆，MARTIN B，裴吉，等. 侧流道泵叶轮轴径向间隙内流动特性数值模拟与验证[J]. 农业工程学报，2015，31(10)：78-83. ZHANG Fan，MARTIN B，PEI Ji，et al. Numerical simulation and verification on flow characteristics of impeller axial and radial gaps in side channel pump[J]. Transactions of the Chinese Society of Agricultural Engineering，2015，31(10)：78-83.
[8] NEJADALI J. Analysis and evaluation of the performance and utilization of regenerative flow pump as turbine (PAT) in Pico-hydropower plants[J]. Energy for Sustainable Development，2021，64(10)：103-117.
[9] PEI Ji，ZHANF Fan，APPIAH D，et al. Performance prediction based on effects of wrapping angle of a side channel pump[J]. Energies，2019，12(1)：1-20.
[10] CANTINI G，SALVADORI S. Numerical characterization of the performance curve of a regenerative pump-as-turbine[J]. Journal of Fluids Engineering，2021，143(5)：051001.
[11] QUAIL F，SCANLON T，STICKLAND M. Design optimisation of a regenerative pump using numerical and experimental techniques[J]. International Journal of Numerical Methods for Heat and Fluid Flow，2009，21(1)：95-111.
[12] MAITY A，CHANDRASHEK V，AFZAL M. Experimental and numerical investigation of regenerative centrifugal pump using CFD for performance enhancement[J]. International Journal of Current Engineering and Technology，2015，5(4)：2347-5161.
[13] CHOI W C，YOO I S，PARK M R，et al. Experimental study on the effect of blade angle on regenerative pump performance[J]. Proceedings of the Institution of Mechanical Engineers，Part A：Journal of Power and Energy，2013，227(5)：585-592.
[14] CHEN K，ZHANG Fan，APPIAH D，et al. Effect of blade tip cutting angle on energy conversion mechanism of side channel pumps[J]. Physics of Fluids，2022，34(2)：025107.
[15] FLEDER A，BÖHLE M. A systematical study of the influence of blade length，blade width，and side channel height on the performance of a side channel pump[J]. Journal of Fluids Engineering，2015，137(12)：121102.
[16] FLEDER A，BÖHLE M. A systematical study of the influence of blade number on the performance of a side channel pump[J]. Journal of Fluids Engineering，2019，141(11)：111109.
[17] 张帆，袁寿其，魏雪园，等. 基于熵产的侧流道泵流动损失特性研究[J]. 机械工程学报，2018，54(22)：137-144. ZHANG Fan，YUAN Shouqi，WEI Xueyuan，et al. Study on flow loss characteristics of side channel pump based on entropy production[J]. Journal of Mechanical Engineering，2018，54(22)：137-144.
[18] ZHANG Fan，APPIAH D，HONG Feng，et al. Energy loss evaluation in a side channel pump under different wrapping angles using entropy production method[J]. International Communications in Heat and Mass Transfer，2020，113(4)：104526.
[19] WANG Yefang，ZHANG Fan，YUAN Shouqi，et al. Effect of unrans and hybrid Rans-Les turbulence models on unsteady turbulent flows inside a side channel pump[J]. Journal of Fluids Engineering，2020，142(6)：061503.
[20] ZHANG Fan，APPIAH D，CHEN Ke，et al. Dynamic characterization of vortex structures and their evolution mechanisms in a side channel pump[J]. Journal of Fluids Engineering，2020，142(11)：111502.
[21] ZHANG Fan，CHEN Ke，APPIAH D，et al. Description of unsteady flow characteristics in a side channel pump with a convex blade[J]. Journal of Fluids Engineering，2020，143(4)：041201.
[22] BADAMI M，MURA M. Theoretical model with experimental validation of a regenerative blower for hydrogen recirculation in a PEM fuel cell system[J]. Energy Conversion and Management，2010，51(3)：553-560.
[23] BADAMI M，MURA M. Comparison between 3D and 1D simulations of a regenerative blower for fuel cell applications[J]. Energy Conversion and Management，2012，55：93-100.
[24] BADAMI M，MURA M. Leakage effects on the performance characteristics of a regenerative blower for the hydrogen recirculation of a PEM fuel cell[J]. Energy Conversion and Management，2012，55：20-25.
[25] BADAMI M，MURA M. Setup and validation of a regenerative compressor model applied to different devices[J]. Energy Conversion and Management，2011，52(5)：2157-2164.
[26] KUMAR M，VENKATESHWARAN A，KUMAR M，et al. Strength analysis of a regenerative flow compressor and a pump based on fluid-structure coupling[J]. Materials Today：Proceedings，2022，51(3)：1619-1624.
[27] MORADI R，HABIB E，BOCCI E，et al. Investigation on the use of a novel regenerative flow turbine in a micro-scale organic rankine cycle unit[J]. Vacuum，2020，210(12)：118519.
[29] LI Qianqian，ZHAO Guoshou，WU Chengshuo，et al. Investigation on the energy exchange characteristics of the regenerative flow pump in an automobile fuel system[J]. Journal of Fluids Engineering，2020，142(11)：111206.
[30] LI Qianqian，WU Chengshuo，QIAN Bo，et al. Investigation of the matching relation between impeller and flow channel of regenerative flow pumps[J]. Journal of Fluids Engineering，2021，143(6)：061209.
[31] LI Qianqian，ZHU Dongsheng，LUO Minghao，et al. Investigation on the pressure fluctuation characteristics for a regenerative flow pump under different blade arrangements[J]. Journal of Fluids Engineering，2022，144(10)：101208.