| 叶片数变化对轴流泵流体激励力影响 |
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| 引用本文： | 陈长盛,杨爱玲,李国平,周 璞,王 强. 叶片数变化对轴流泵流体激励力影响[J]. 噪声与振动控制, 2013, 33(3): 55-59. DOI: 10.3969/j.issn.1006-1335.2013.04.012 |
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| 作者姓名： | 陈长盛 杨爱玲 李国平 周 璞 王 强 |
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| 作者单位： | ( 1. 上海船舶设备研究所， 上海 200031；2. 上海理工大学, 上海 200093 ) |
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| 摘 要： | 泵的振动有一部分是由泵内的非稳定流动引起的，叶片数的改变会引起泵内非稳态流场的变化，从而对泵的振动特性产生影响。通过流体力学计算软件FLUENT对某台立式轴流泵内流场进行仿真计算，先通过定常计算得出泵的性能与叶片数的关系，并以定常计算结果为初场进行非定常计算，得出分别在3、4、5叶片下，作用在泵壳及叶轮上的流体激励力的变化情况。结果表明额定工况下4叶片设计的扬程和效率最高，随着叶片数减少，1倍叶频处的压强系数峰值逐渐增大，泵内流体激励力脉动变强，会使流动诱导的振动增加。
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| 关 键 词： | 振动与波 叶片数 轴流泵 压力脉动 |
| 收稿时间： | 2013-01-17 |
Fluid Excitation Forces of Axial Flow Pumps with Different Number of Blades |
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| Abstract: | Vibration of the pump is partly caused by the pressure pulsation of the unsteady fluid in the pump, the change of flow field within the pump caused by the change of the number of blades, and the vibration characteristics of the pump will be affected. The flow field of an axial flow pump is simulated under the condition of that the steady calculation results is made as the initial field. The results of excitation force of flow on pump and impeller is calculated and analyzed under different number of blades. The results show that the head and efficiency of the pump with 4 blades is highest, with the reduction of the number of blades, the peak of pressure coefficient at 1 times frequency is gradually increased, the pulsation of excitation force of flow in pump is stronger, the vibration of pump caused by flow is stronger. |
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