离心泵作透平倾斜叶片主动降噪

发布时间：2018-03-09 12:16

本文选题：离心泵作透平　切入点：倾斜叶片　出处：《上海交通大学学报》2016年04期 　论文类型：期刊论文

【摘要】：为降低离心泵作透平流体诱发的内外场噪声,从同相位脉动水动力作用面积与辐射噪声的关系出发,建立了叶片倾斜角度关系式,提出了在保证性能前提下倾斜叶片的主动控制降噪方法.利用透平实验平台,对2组不同倾斜角度的透平进行了水力性能、内场噪声实验;在验证壳体有限元模型的基础上,基于有限元/自动匹配层进行了外场噪声数值研究.结果表明:倾斜叶片可以保持离心泵作透平的原有水力性能,大流量工况效率最高增加1.09个百分点;同时能够降低整体频段的总声能,内场总声压级降低0.07%~3.02%,外场总声功率级大流量工况降幅最大,降低约11.97%;内外场主要频率处的声压级也得到了不同程度的降低.
[Abstract]:In order to reduce the internal and external field noise induced by centrifugal pump acting as turbine fluid, the relationship of blade inclination angle was established based on the relationship between the in-phase pulsating hydrodynamic action area and the radiation noise. In this paper, an active noise reduction method for inclined blades with guaranteed performance is proposed. Based on the turbine experimental platform, the hydraulic performance and internal field noise of two sets of turbines with different tilting angles are tested, and the finite element model of the shell is verified. Based on the finite element / automatic matching layer, the external field noise numerical study is carried out. The results show that the tilted blade can keep the original hydraulic performance of centrifugal pump as turbine, and the efficiency of large flow condition can be increased by 1.09 percentage points. At the same time, the total sound energy of the whole frequency band can be reduced, the total sound pressure level of the inner field is reduced by 0.07and 3.02, the total sound power level of the external field decreases by 11.97, and the sound pressure level at the main frequency of the internal and external field is reduced to varying degrees.
【作者单位】：江苏大学能源与动力工程学院;江苏大学流体机械工程技术研究中心;
【基金】：国家自然科学基金项目(51309119,51509111) 中国博士后科学基金项目(2015M581734) 江苏高校优势学科建设工程项目(PAPD) 江苏大学高级人才科研启动基金(12JDG082,15JDG052) 西华大学流体及动力机械教育部重点实验室开放课题(szjj2015-017) 过程装备与控制工程四川省高校重点实验室开放基金项目(GK201403) 浙江省重大科技专项重大工业项目(2014C01004-1) 浙江省博士后科学基金项目资助
【分类号】：TH311

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