导叶相对距离对S形轴伸式贯流泵压力脉动特性的影响
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摘要
为了分析不同导叶相对距离对S形轴伸式贯流泵装置压力脉动特性的影响,采用ANSYS CFX软件对4种不同导叶相对距离的泵装置进行了三维定常与非定常计算,并通过模型试验验证数值模拟计算的可靠性。结果表明:泵装置扬程与效率随导叶相对距离的增大先增加后减小,导叶相对距离对扬程的影响趋势更明显;导叶相对距离对监测点主频频率没有影响而对幅值影响较大;当导叶相对距离增大时,在导叶进口处,主频幅值逐渐减小,断面高压力脉动强度面积逐渐减小,近轮缘侧压力脉动强度变化比近轮毂侧更明显;在导叶出口处,各频幅值先减小后增大,断面高压力脉动强度面积先减小后增大;导叶相对距离为16 mm时,泵装置综合性能最优。
To study the influence of different relative distances of guide vanes on the pressure pulsation characteristics of a S-shaped extension tubular pumping system,three-dimensional steady calculation and unsteady calculation were applied under 4 different relative positions of guide vanes by using ANSYS CFX software and the reliability of the numerical simulation was verified by a model test. The results show that the pump head and efficiency increase first and then decrease with the increasing of the guide vanes' relative distance,and the pump head can be affected much more obviously. The relative distance of the guide vanes has no influence on the dominant frequency of the monitoring points,but it has greater impact on the amplitude. With an increase of the relative distance at the guide vanes' inlet position,the amplitudes of dominant frequency and cross section area of high pressure pulsation strength can decrease. The pressure pulsation strength variation near the flange side is more obvious than that near the hub side. The amplitude of the dominant frequency decreases first and then increases at the guide vanes' outlet and the cross-section area of high pressure fluctuation strength decreases first and then increases. The performance of the pump is optimum when the relative position of the guide vanes is set to be 16 mm.
To study the influence of different relative distances of guide vanes on the pressure pulsation characteristics of a S-shaped extension tubular pumping system,three-dimensional steady calculation and unsteady calculation were applied under 4 different relative positions of guide vanes by using ANSYS CFX software and the reliability of the numerical simulation was verified by a model test. The results show that the pump head and efficiency increase first and then decrease with the increasing of the guide vanes' relative distance,and the pump head can be affected much more obviously. The relative distance of the guide vanes has no influence on the dominant frequency of the monitoring points,but it has greater impact on the amplitude. With an increase of the relative distance at the guide vanes' inlet position,the amplitudes of dominant frequency and cross section area of high pressure pulsation strength can decrease. The pressure pulsation strength variation near the flange side is more obvious than that near the hub side. The amplitude of the dominant frequency decreases first and then increases at the guide vanes' outlet and the cross-section area of high pressure fluctuation strength decreases first and then increases. The performance of the pump is optimum when the relative position of the guide vanes is set to be 16 mm.
引文
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[14]刘厚林,杜辉,董亮,吴贤芳,刘东喜.离心泵蜗壳内压力脉动特性数值分析[J].水利水电科技进展,2013,33(1):18-21.(LIU Houlin,DU Hui,DONG Liang,et al.Numerical analysis of pressure fluctuation in the volute of centrifugal pump[J].Advances in Science and Technology of Water Resources,,2013,33(1):18-21.(in Chinese))
[15]顾延东,袁寿其,裴吉.导叶安装位置对混流泵压力脉动特性的影响[J].排灌机械工程学报,2017,35(2):93-99.(GU Yandong,YUAN Shouqi,PEI Ji,et al.Effects of diffuser installation position on pressure fluctuation in mixed flow pump[J].Journal of Drainage and Irrigation Machinery Engineering,2017,35(2):93-99.(in Chinese))
[16]李伟,竺晓程,王惠斌.时序效应对涡轮叶片非定常作用力影响的数值研究[J].推进技术,2012,33(1):47-53.(LI Wei,ZHU Xiaocheng,WANG Huibin,et al.Numerical simulation of clocking effect on turbine blade unsteady force[J].Journal of Propulsion Technology,2012,33(1):47-53.(in Chinese))
[17]裴吉,袁寿其,袁建平.单叶片离心泵压力脉动强度多工况对比研究[J].华中科技大学学报(自然科学版),2013,41(12):29-33.(PEI Ji,YUAN Shouqi,YUANJianping,et al.Comparative study of pressure fluctuation intensity for a single-blade pump under multiple operating conditions[J].Huazhong University of Science and Technology(Natural Science Edition),2013,41(12):29-33.(in Chinese))
[18]王文杰,袁寿其,裴吉.时序效应对导叶式离心泵内部压力脉动影响的数值分析[J].机械工程学报,2015,51(4):185-192.(WANG Wenjie,YUAN Shouqi,PEI Ji,et al.Numerical analysis of the clocking effect on the pressure fluctuation in the centrifugal pump with vaned diffuser[J].Chinese Journal of Mechanical Engineering,2015,51(4):185-192.(in Chinese))
[2]张德胜,耿琳琳,施卫东,等.轴流泵水力模型压力脉动和振动特性试验[J].农业机械学报,2015,46(6):66-72.(ZHANG Desheng,GENG Linlin,SHI Weidong,et al.Experimental investigation on pressure fluctuation and vibration in axial-flow pump model[J].Transactions of The Chinese Society of Agricultural Machinery,2015,46(6):66-72.(in Chinese))
[3]王福军,张玲,张志民,等.轴流式水泵非定常湍流数值模拟的若干关键问题[J].机械工程学报,2008,44(8):73-77.(WANG Fujun,ZHANG Ling,ZHANGZhimin,et al.Some key issues of unsteady turbulent numerical simulation in axial-flow pump[J].Chinese Journal of Mechanical Engineering,2008,44(8):73-77.(in Chinese))
[4]赵浩儒,杨帆,吴俊欣,等.立式轴流泵装置压力脉动特性的试验[J].流体机械,2017,45(7):12-16.(ZHAOHaoru,YANG Fan,WU Junxin,et al.Experimental analysis on pressure fluctuation of multiple conditions in axial-flow pumping system[J].Fluid Machinery,2017,45(7):12-16.(in Chinese))
[5]杨帆,刘超,许旭东,等.S形贯流泵装置水力模型非定常水动力特性分析[J].应用基础与工程科学学报,2016,24(3):442-453.(YANG Fan,LIU Chao,XUXudong,et al.Unsteady hydrodynamic performance of hydraulic model in s-shaped shaft extension tubular pumping system[J].Journal of Basic Science and Engineering,2016,24(3):442-453.(in Chinese))
[6]颜红勤.梅梁湖泵站竖井贯流泵装置主要参数的确定[J].水利水电科技进展,2005,25(6):91-94.(YANHongqin.Determination of main parameters for shaft tubular pumping system[J].Advances in Science and Technology of Water Resources,2005,25(6):91-94.(in Chinese))
[7]SCHENNACH O,WOISETSCHGER J,MARN A,et al.Laser-doppler-velocimetry measurements in a one and a half stage transonic test turbine with different angular stator-stator positions[J].Experiments in fluids,2007,43(2/3):385-393.
[8]CHEN E,MA Z,ZHAO G,et al.Numerical investigation on vibration and noise induced by unsteady flow in an axialflow pump[J].Journal of Mechanical Science and Technology,2016,30(12):5398-5403.
[9]LIU Y,TAN L,LIU M,et al.Influence of prewhirl angle and axial distance on energy performance and pressure fluctuation for a centrifugal pump with inlet guide vanes[J].Energies:Part A,2017,10(5):454-465.
[10]张德胜,施卫东,王川,等.斜流泵叶轮和导叶叶片数对压力脉动的影响[J].排灌机械工程学报,2012,30(2):167-170.(ZHANG Desheng,SHI Weidong,WANGChuan,et al.Influence of impeller and guide vane blade number on pressure fluctuation in mixed-flow pump[J].Journal of Drainage and Irrigation Machinery Engineering,2012,30(2):167-170.(in Chinese))
[11]王玲花,刘大恺,陈德新.双向贯流泵导叶设置与原动机布置的研究[J].河海大学学报(自然科学版),2002,30(1):106-108.(WANG Linghua,LIU Dakai,CHENDexin.Study on arrangement of guide blade and prime motor for bidirectional tubular axial-flow pumps[J].Journal of Hohai University(Natural Science),2002,30(1):106-108.(in Chinese))
[12]史广泰,杨军虎,苗森春,等.不同导叶数下液力透平蜗壳内压力脉动计算[J].航空动力学报,2015,30(5):1228-1235.(SHI Guangtai,YANG Hujun,MIAOSenchun,et al.Calculation of pressure fluctuation within volute of hydraulic turbine under different guide vane numbers[J].Journal of Aerospace Power,2015,30(5):1228-1235.(in Chinese))
[13]程效锐,贾程莉,杨从新.导叶周向布置位置对核主泵压力脉动的影响[J].机械工程学报,2016,52(16):197-204.(CHENG Xiaorui,JIA Chengli,YANG Congxin,et al.Influence of circumferential position of guide vane on unsteady flow characteristics in reactor coolant pump[J].Chinese Journal of Mechanical Engineering,2016,52(16):197-204.(in Chinese))
[14]刘厚林,杜辉,董亮,吴贤芳,刘东喜.离心泵蜗壳内压力脉动特性数值分析[J].水利水电科技进展,2013,33(1):18-21.(LIU Houlin,DU Hui,DONG Liang,et al.Numerical analysis of pressure fluctuation in the volute of centrifugal pump[J].Advances in Science and Technology of Water Resources,,2013,33(1):18-21.(in Chinese))
[15]顾延东,袁寿其,裴吉.导叶安装位置对混流泵压力脉动特性的影响[J].排灌机械工程学报,2017,35(2):93-99.(GU Yandong,YUAN Shouqi,PEI Ji,et al.Effects of diffuser installation position on pressure fluctuation in mixed flow pump[J].Journal of Drainage and Irrigation Machinery Engineering,2017,35(2):93-99.(in Chinese))
[16]李伟,竺晓程,王惠斌.时序效应对涡轮叶片非定常作用力影响的数值研究[J].推进技术,2012,33(1):47-53.(LI Wei,ZHU Xiaocheng,WANG Huibin,et al.Numerical simulation of clocking effect on turbine blade unsteady force[J].Journal of Propulsion Technology,2012,33(1):47-53.(in Chinese))
[17]裴吉,袁寿其,袁建平.单叶片离心泵压力脉动强度多工况对比研究[J].华中科技大学学报(自然科学版),2013,41(12):29-33.(PEI Ji,YUAN Shouqi,YUANJianping,et al.Comparative study of pressure fluctuation intensity for a single-blade pump under multiple operating conditions[J].Huazhong University of Science and Technology(Natural Science Edition),2013,41(12):29-33.(in Chinese))
[18]王文杰,袁寿其,裴吉.时序效应对导叶式离心泵内部压力脉动影响的数值分析[J].机械工程学报,2015,51(4):185-192.(WANG Wenjie,YUAN Shouqi,PEI Ji,et al.Numerical analysis of the clocking effect on the pressure fluctuation in the centrifugal pump with vaned diffuser[J].Chinese Journal of Mechanical Engineering,2015,51(4):185-192.(in Chinese))
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