| 苏晓珍,姚金玲,张晨,解文辰.变角调节斜流泵振动特性试验测试及数值模拟[J].安徽建筑大学学报,2017,25(2):31-35 |
| 变角调节斜流泵振动特性试验测试及数值模拟 |
| Experimental Testing and Numerical Simulation on Vibration Characteristics of the Core Pulling Diagonal-flow Pump |
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| DOI：10.11921/j.issn.2095-8382.20170207 |
| 中文关键词: 斜流泵，双向FIS，现场测试，脉动频谱 |
| 英文关键词: diagonal-flow pump, bidirectional FSI, field test, vibration spectrum, |
| 基金项目:/ |
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| 中文摘要: |
| 大型斜流泵广泛应用于给水排水等重点水利工程中，振动大是影响其稳定运行的关键因素。本文首先对其实际运行过程进行测试，结合数值模拟技术对不同叶片角度下泵内部不稳定流动特性进行分析，结果发现：数值模拟监测点与实测点的脉动频谱变化规律基本相同，脉动主要发生在低频区，转频为主因，通过频率为次因；在小流量区域均有一段不稳定区域，且叶片角度从-80到+20的调度过程中，不稳定区域逐渐增大，在80%以上效率区间，流量范围可以从8 m3/s达到21m3/s；叶片角为+10时，有效扬程在误差最大，达到6.92%，而其他误差均在5% 以内，最大效率误差均小于5%；叶片角为“+”的压力脉动大于叶片角为“-”角时的压力脉动，且最大值均出现在导叶与叶轮耦合交界面处。上述研究成果能够为同类变角调节叶片泵振动特性分析提供参考。 |
| 英文摘要: |
| Large core pulling diagonal-flow pump is widely used in water supply and drainage projects. The severe vibration of large diagonal-flow pump is the major factor of stability of operation. In this research, the researcher tests the process of the actual operation combining with the analysis of the numerical simulation technology for different angle pump internal unsteady flow characteristic. The results of this research show that he numerical simulation of the fluctuation spectrum changes of monitoring points and the measured point is basically identical. The pulsation mainly occurs in the low frequency region, and rotating frequency is the main factor, and passing frequency is secondary factor. There is an unstable region in the small flow area and the blade angle is from -80 to +20 in the scheduling process. For the entire curve the efficiency range in more than 80%, the flow may be from 8 m3/s up to 21 m3/s. When the blade angle appears +10, the maximum error of effectively head is 6.92% at 10and the others’ error are in less than 5%. The maximum efficiency error is less than 5% in all angles. The pulsation of "+" blade angles are generally greater than "-" blade angles’, and mainly occurs in coupling interface between the guide vanes and impellers. The results of this research may provide the analysis of the vibration characteristics of the same kind of variable angle regulating vane pump with some references. |
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