非光滑结构叶轮对离心泵降噪的影响研究

TH311; 利用仿生学原理,对叶片工作面的前中后部分别进行半球形非光滑结构处理,结合流场CFD和声场LMS进行模拟计算,对某离心泵设计流量的流场及声场结果进行对比分析.结果表明:非光滑结构使叶片受到的摩擦阻力更小,进而有效减小叶片表面的剪切应力和湍动能,在叶片进出处削弱效果最明显;同时使叶轮流道中的涡强度明显降低,泵的内部涡流分布更加均匀,在整体上能够有效降低其湍流脉动强度,稳定流场流动并有效地降低流动噪声.非光滑结构叶片能有效降低总声压级,其中在叶轮出口处最优降噪为3.28 dB,降噪率为1.9%;隔舌处的总声压级下降3.11 dB,降噪率为1.82%.综上所述,非光滑叶片相比于光滑叶片有...

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Published in中国农村水利水电 no. 12; pp. 241 - 247
Main Authors 张秋, 宋洁, 宋文武, 杨绍坵, 赵宇轩
Format Journal Article
LanguageChinese
Published 四川水利职业技术学院,四川 成都 611830 15.12.2023
西华大学能源与动力工程学院,四川 成都 610039%西华大学流体及动力机械教育部重点实验室,四川 成都 610039
西华大学流体及动力机械教育部重点实验室,四川 成都 610039
Subjects
离心泵
noise reduction optimization
降噪优化
centrifugal pump
非光滑结构叶轮
non-smooth impeller
Online AccessGet full text
ISSN1007-2284
DOI10.12396/znsd.230323

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Abstract TH311; 利用仿生学原理,对叶片工作面的前中后部分别进行半球形非光滑结构处理,结合流场CFD和声场LMS进行模拟计算,对某离心泵设计流量的流场及声场结果进行对比分析.结果表明:非光滑结构使叶片受到的摩擦阻力更小,进而有效减小叶片表面的剪切应力和湍动能,在叶片进出处削弱效果最明显;同时使叶轮流道中的涡强度明显降低,泵的内部涡流分布更加均匀,在整体上能够有效降低其湍流脉动强度,稳定流场流动并有效地降低流动噪声.非光滑结构叶片能有效降低总声压级,其中在叶轮出口处最优降噪为3.28 dB,降噪率为1.9%;隔舌处的总声压级下降3.11 dB,降噪率为1.82%.综上所述,非光滑叶片相比于光滑叶片有着不错的降噪效果,总体降噪率大约在0.81%～1.90%.
AbstractList TH311; 利用仿生学原理,对叶片工作面的前中后部分别进行半球形非光滑结构处理,结合流场CFD和声场LMS进行模拟计算,对某离心泵设计流量的流场及声场结果进行对比分析.结果表明:非光滑结构使叶片受到的摩擦阻力更小,进而有效减小叶片表面的剪切应力和湍动能,在叶片进出处削弱效果最明显;同时使叶轮流道中的涡强度明显降低,泵的内部涡流分布更加均匀,在整体上能够有效降低其湍流脉动强度,稳定流场流动并有效地降低流动噪声.非光滑结构叶片能有效降低总声压级,其中在叶轮出口处最优降噪为3.28 dB,降噪率为1.9%;隔舌处的总声压级下降3.11 dB,降噪率为1.82%.综上所述,非光滑叶片相比于光滑叶片有着不错的降噪效果,总体降噪率大约在0.81%～1.90%.
Abstract_FL By using the principle of bionics,this paper treats the front,middle and rear parts of the blade working surface with hemispherical non-smooth structure,combined with the flow field CFD and acoustic field LMS for simulation calculation.The flow field and sound field re-sults of the design flow of a centrifugal pump are compared and analyzed.The results show that the non-smooth structure makes the frictional resistance of the blade smaller,and then effectively reduces the shear stress and turbulent kinetic energy on the blade surface,and the weak-ening effect is most obvious at the blade entry and exit.At the same time,the vortex strength in the impeller flow channel is significantly re-duced,and the internal vortex distribution of the pump is more uniform,which can effectively reduce its turbulent pulsation intensity as a whole,stabilize the flow field and effectively reduce the flow noise.The non-smooth structure blade can effectively reduce the total sound pressure level,among which the optimal noise reduction at the impeller outlet is 3.28 dB and the noise reduction rate is 1.9%.The total sound pressure level at the diaphragm is reduced by 3.11 dB,and the noise reduction rate is 1.82%.In summary,non-smooth blades have a good noise reduction effect compared with smooth blades,and the overall noise reduction rate is about 0.81%～1.90%.
Author 张秋
赵宇轩
杨绍坵
宋洁
宋文武
AuthorAffiliation 西华大学流体及动力机械教育部重点实验室,四川 成都 610039;西华大学能源与动力工程学院,四川 成都 610039%西华大学流体及动力机械教育部重点实验室,四川 成都 610039;四川水利职业技术学院,四川 成都 611830
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Author_FL SONG Wen-wu
ZHANG Qiu
ZHAO Yu-xuan
SONG Jie
YANG Shao-qiu
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DocumentTitle_FL Research on the Influence of Non-smooth Structure Impeller on Noise Reduction of Centrifugal Pump
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Issue 12
Keywords 离心泵
noise reduction optimization
降噪优化
centrifugal pump
非光滑结构叶轮
non-smooth impeller
Language Chinese
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PublicationTitle 中国农村水利水电
PublicationTitle_FL China Rural Water and Hydropower
PublicationYear 2023
Publisher 四川水利职业技术学院,四川 成都 611830
西华大学能源与动力工程学院,四川 成都 610039%西华大学流体及动力机械教育部重点实验室,四川 成都 610039
西华大学流体及动力机械教育部重点实验室,四川 成都 610039
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Title 非光滑结构叶轮对离心泵降噪的影响研究
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