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| 1 | 自吸泵内能量损失及非定常流动特性研究显示文摘自吸泵由于其特有的气液分离腔和回流孔结构使得其内部流动更为复杂,本文针对自吸泵内能量损失及非定常流动特性开展实验和数值研究。通过开展模型泵水力性能实验,发现数值计算结果与实验结果具有较好一致性。利用熵产理论和Q准则定量分析了不同工况下自吸泵内不同区域的能量损失特性及涡核分布特征,结果表明:泵内熵产分布特征与水力损失分布特征基本一致,叶轮、蜗壳和气液分离腔是自吸泵内能量损失的主要区域。蜗壳内部的压力脉动强度在靠近隔舌区域较大,蜗壳中段处变弱,蜗壳出口扩散段处又进一步增强。在小流量工况下,叶轮和蜗壳内部涡核分布面积较大,涡核主要分布在叶轮的进口处和出口处。 | 舒欣 任芸 吴登昊 祝之兵 牟介刚 | 2019 | 水利学报2019，50，8： | 12 |
| 2 | 双叶片离心泵内固液两相流径向力特性研究显示文摘径向力特性是泵运行稳定性的一个重要指标。为了研究固体颗粒物性对固液两相流泵径向力的影响,采用Mixture多相流模型对双叶片泵内部流动进行三维非定常模拟计算,并分析了不同工况和颗粒物性下泵径向力特性的变化规律。研究结果表明:固液两相流工况时的叶轮径向力峰值及其峰峰值均比对应流量的清水工况时要大,最大增幅分别达到7.8%和8.2%;两相流条件下,一个叶轮旋转周期内前后半个周期的叶轮径向力分布重合部分均较少;随颗粒密度、体积分数和粒径的增大,叶轮径向力大小和方向波动的越来越剧烈,叶轮径向力矢量中心有从坐标系第二象限向第四象限移动的趋势。 | 邱勇 张可可 唐晓晨 吴贤芳 谈明高 | 2019 | 中国农村水利水电2019，，6： | 9 |
| 3 | 离心泵动静干涉的试验及数值研究显示文摘为了更好地揭示离心泵偏工况运行时其内部压力和速度的分布规律,本文采用试验与数值模拟相结合的方法研究离心泵内压力和速度耦合作用。数值模拟采用基于SST湍流模型的尺度自适应模拟方法进行数值计算。结果表明:受蜗壳不对称作用影响,小流量下蜗壳压力由隔舌至出口逐渐增大,大流量下与之相反,导致叶轮流道过流量出现与压力波动趋势相反的变化;偏工况时由于蜗壳压力分布不均匀导致隔舌处存在冲角,小流量下隔舌内侧存在低压区,大流量下隔舌外侧存在低压区,设计流量下蜗壳压力分布较为均匀,但在隔舌前部存在高压滞止区;偏工况下隔舌处不同的压力分布趋势,对经过隔舌的叶轮流道的流量及出口压力波动产生不同的影响。研究结果为离心泵多工况优化提供参考,具有一定的工程应用价值。 | 朱相源 赖芬 谢昌成 李国君 ROMUALD.S | 2020 | 哈尔滨工程大学学报2020，41，8： | 4 |
| 4 | Effect of the volute tongue cut on pressure pulsations of a low specific speed centrifugal pump显示文摘The volute tongue,as the crucial component inducing rotor-stator interaction,is detrimental to unsteady pressure pulsations of centrifugal pumps.In the present paper,to investigate the effect of the volute tongue cut on pressure pulsations of a low specific speed centrifugal pump,three volute tongues are obtained through twice cuts,named cases 1,2,3.Twenty measuring points are evenly mounted on periphery of the volute casing to obtain unsteady pressure signals using high response transducers.Pressure amplitudes at the blade passing frequency fBPF and root mean square(rms)values in 0 Hz-500 Hz frequency band are applied to evaluate the cutting effect.Results show that pressure spectrum is significantly affected by the volute tongue cut,especially for the component at fBPF.For different measuring points,influences of the volute tongue cut on three cases are not identical.From nns values,it is evident that cutting the volute tongue will lead to pressure energy increasing for most of the concerned measuring points,especially for the points at the far away region from the volute tongue.Finally,from comparison with the original shape case 1,the averaged increment of the twenty points is more than 20%.So it is concluded that for this type centrifugal pump,cutting the volute tongue is not reasonable considering low pressure pulsation requirement. | Ning Zhang Bo Gao Bin Xia Qi-feng Jiang | 2020 | Journal of Hydrodynamics2020，32，4： | 3 |
| 5 | 低比转速离心泵压力脉动特性研究显示文摘为了降低压力脉动对低比转速离心泵产生的不利影响,在固液两相流条件下,对离心泵内的压力脉动(尤其是隔舌处的压力脉动)以及径向力进行了研究。首先,以一台n_(s)为66的低比转速离心泵为研究对象,利用软件构建了离心泵三维仿真模型,并对模型进行了网格划分;然后,选用了Mixture多相流模型和RNG k-ε湍流模型作为计算模型,在离心泵叶片、蜗壳以及隔舌处设置了监测点,并设置了计算方案;最后,采用ANSYS CFX软件,通过数值模拟的方法,对低比转速离心泵内部各监测点的压力脉动和径向力规律进行了研究,以得到离心泵内颗粒粒径、颗粒浓度和离心泵流量对离心泵压力脉动特性的影响规律。研究结果表明:当d=1.0%时,随着颗粒粒径增大,各监测点的压力脉动幅值减小,叶轮处径向力总体下降,蜗壳处径向力总体上升;当d=0.5 mm时,随着液体浓度增加,离心泵内压力脉动幅值整体呈上升趋势,但隔舌处略有减小,叶轮处所受径向力不断增加,蜗壳处径向力减小;离心泵隔舌处监测点的压力脉动主要出现在叶频及其倍频处,叶片监测点处的压力脉动主要出现在小频率区间内,因此,适当减小离心泵内颗粒粒径,增加颗粒浓度及流量可以降低隔舌处的压力脉动。 | 任蔼琳 宋文武 周月 | 2022 | 机电工程2022，39，12： | 2 |
| 6 | Application of the hybrid RANS/LES method on the hydraulic dynamic performance of centrifugal pumps显示文摘The nonlinear hybrid RANS/LES method has been developed considering the simulation efficiency and accuracy to simulate the hydraulic dynamic characteristics of the centrifugal pump. It has been proved that the nonlinear hybrid RANS/LES method could effectively capture the unsteady flow structure and pressure pulsation in 2?D centrifugal pumps. To further investigate the hydraulic dynamic performance of a redesigned 3-D-gap drainage centrifugal pump, the nonlinear hybrid RANS/LES method is employed. Both numerical simulation and experimental results show that the hydraulic performance and pressure pulsation characteristics of the 3-D-gap drainage impeller centrifugal pump are significantly enhanced. | Zheng-chuan Zhang Hong-xun Chen Zheng Ma Qun Wei Jian-wu He Hui Liu Chao Liu | 2019 | Journal of Hydrodynamics2019，31，3： | 1 |
| 7 | 非设计工况下带分流叶片半开式离心叶轮内部流动特性数值研究显示文摘In order to investigate the complex flow characteristics inside an unshrouded centrifugal impeller with splitter blades at off-design conditions,and analyze its influence on pump operation stability,a numerical simulation study was carried on using the curvature-corrected SST-CC turbulence model;the head and efficiency accorded with experimental results.The pressure fluctuation,unsteady radial force and velocity were analyzed quantitatively and the numerical results indicate this:the peak to peak value of pressure fluctuation in the impeller channel gradually increases in the flow direction and at 0.49Qn,the slope of peak to peak value to normalized impeller channel behind the splitter blade is 8.57 times greater than that before the splitter blade.The greater the flow rate deviates from the design condition,the larger the peak to peak value of the pressure fluctuation and radial force;in particular at 0.27Qn,the maximum radial force is 194.29%greater than that of the design condition.When the operating flow rate is smaller than 0.83Qn,the stall occurs and the stall vortex could block the impeller discharge;as the flow rate decreases further,the pressure amplitude at rotational frequency gradually increases in the impeller channel and the prevailing frequency changes from the blade passage frequency(BPF)to the rotating stall frequency in the diffuser.The tip leakage vortex(TLV)is generated in the tip region and rotated move downstream in the impeller flow channel,and the backflows appear on the blade suction side and in the tip and the tongue regions;the smaller the flow rate,the more serious the TLV and backflow phenomenon.The rotating stall causes uneven flow in the impeller channel,increasing the pressure fluctuation and the radial force,and resulting in an imbalance of the impeller rotation. | 曾永顺 刘连强 郝晓林 姚志峰 王福军 杨敏 | 2021 | 风机技术2021，63，2： | 1 |
| 8 | 离心泵仿生叶片的降噪特性研究显示文摘采用仿生学思维对离心泵叶片出口进行仿生改造,结合CFD和噪声计算对设计工况下的流场和声场信息进行对比分析,用数值模拟方法验证其结构改进后的降噪效果。计算结果表明:采用仿生结构叶片能够有效的降低隔舌、蜗壳出口和叶轮流道内的湍流脉动强度,同时使流场中的涡结构尺度减小,控制流场中涡结构的分布范围,降低了离心泵内噪声源强度,达到降低噪声的目的。原模型和仿生叶片模型的压力脉动特征频率均为叶频及其低阶倍频,仿生叶片模型在各监测位置的压力脉动均比原模型有明显的降低;仿生叶片使各监测点噪声源强度降低,其出口3倍管径处的降噪效果最佳,总声压级下降3.62 dB,降噪率为3.20%;在隔舌处的总声压级下降1.15 dB,降噪率为0.67%,总体降噪率在0.67%~3.20%,达到了降噪的目的。 | 成涛 符杰 金永鑫 朱俊桦 | 2023 | 热能动力工程2023，38，10： | 0 |
| 9 | 诱导轮对紧凑型磁力泵压力脉动的影响显示文摘为了探究诱导轮对紧凑型磁力泵压力脉动的影响,在叶轮和蜗壳流域内设置9个监测点,通过CFD非定常数值模拟,依据在叶片进口处是否前置诱导轮,分别得到叶轮、蜗壳流域的压力脉动时域图和频域图,并对脉动特性进行对比研究.研究结果表明:前置诱导轮后在第一个叶片通过频率内脉动幅值低于未安装诱导轮时的幅值;在有诱导轮的情况下,叶片进口附近区域脉动幅值比未安装诱导轮时有较大提高;在蜗壳流域内,前置诱导轮后,蜗壳隔舌处压力脉动变化规律及幅值发生明显改变,且减小了叶轮叶片扫掠过隔板起始位置形成的射流尾迹对压力脉动的影响.因此,前置诱导轮在一定程度上有利于泵的安全运行与降低紧凑型磁力泵内的振动. | 孔繁余 张坤 童凯 钱文飞 汪家琼 | 2021 | 排灌机械工程学报2021，39，3： | 0 |
| 10 | 电机转速变化对输油泵内部流场影响的仿真研究显示文摘旨在利用ANSYS Fluent研究电机转速对输油泵蜗壳内液体动力噪声特性的影响。以ZA150-4400输油泵为研究对象,采用RNGk-ε模型模拟不同转速下的流体静压分布和内部流场的流动瞬态特性。结果表明,电机转速是影响输油泵蜗壳内静压分布和流体瞬态特性的主要因素。不同粘度蜗壳内部流场呈现不同的分布状态,粘度越大,静压值越小,当原油粘度一定时,电机转速越低,蜗壳内的静压力波动越小。当电机转速下降到临界值时,蜗壳内壁上的静压力大致相等。 | 刘祥楼 曲晶 张雅茹 刘昭廷 | 2023 | 自动化与仪器仪表2023，，8： | 0 |
| 11 | 原油含水率变化对输油泵蜗壳内部流场影响数值分析与仿真显示文摘为了确定高含水原油集输过程中输油泵流体动力噪声与流体含水率之间的关系,以ZA150-400型离心泵为输油泵机组研究对象,针对设计流量状态下原油含水率变化对输油泵蜗壳内部流场影响开展研究。采用RNGk-ε模型,通过Fluent软件针对含水率0.8-0.98之间6组参数进行数值分析。仿真研究结果表明:随着原油含水率增加,原油流体密度增大、黏度下降;在保持设计流量状态下,蜗壳内流场相应点随原油含水率越高其内压越大;离心泵蜗壳内部流场隔舌处压差最大。 | 刘祥楼 孔汉 刘昭廷 | 2021 | 自动化与仪器仪表2021，，9： | 0 |
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