离心泵流动噪声的测量研究
文献类型：学位论文
| 作者 | 冯涛 |
| 学位类别 | 博士 |
| 答辩日期 | 2004 |
| 授予单位 | 中国科学院声学研究所 |
| 授予地点 | 中国科学院声学研究所 |
| 关键词 | 离心泵流动噪声 声源特性参数 四端网络线性叠加模型 数值仿真 |
| 其他题名 | The Measurement Study of the Flow-induced Noise in Centrifugal Pumps |
| 中文摘要 | 降低沿通海管路向水中辐射噪声最根本的措施是抑制声源本身在通海管路中产生的流动噪声。准确地测量出通海管路中流动噪声的特性参数是船用机电设备噪声机理研究、低噪声设计、降噪措施验证以及设备选型的基本保证。船用机电设备在管路中的流动噪声是由声源本身的运行工况及外接管路系统的声学特性共同决定，在运行工况和外接管路系统确定的情况下，管路中的流动噪声具有确定的特性参数。本论文的研究目的是提出能正确测量和准确描述这一确定声学特性参数的测试理论和方法；建立相应实验系统以验证测试理论及方法的正确性，进而将测试理论、方法及实验系统应用于降低离心泵流动噪声的实验研究中。本论文首先对相关领域的研究工作进行了回顾，对能够描述管道系统中声源特性的各种测试理论进行比较，确定了可对离心泵流动噪声进行准确描述的四端网络线性叠加模型；研究了管路系统中声源与边界条件之间的拙合关系，提出了声源辐射特性与边界条件只存在弱机合的准则；研究了管路系统中声源子系统声学特性的数值仿真结果与无源条件下四端网络矩阵参数之间的关系；基于四端网络线性叠加模型对声源特性参数提取算法进行了研究，建立了以空气和水为介质的管道实验系统，实验测量和数值仿真得到了一致的结果；以离心泵为实验载体，建立了离心泵流动噪声实验研究专用系统，以四端网络线性叠加模型测得的声源特性参数为基础对离心泵系统的流动噪声进行了实验研究，得到了离心泵流动噪声与水力学参数（包括泵轴转速、出口压力及运转不平衡）之间的相互关系，为离心泵流动噪声的机理研究提供了实验手段及依据。本论文所进行的工作对离心泵噪声机理的研究、低噪声泵的设计及改进、通海管路中声传播特性的研究以及船用机电设备流动噪声检测规程的建立，提供了实验研究依据和实现手段。本文最后对此方面的研究工作，今后的研究方向及要解决的问题提出建议。 |
| 英文摘要 | One of the ultimate methods to lower the radiation sound from the sea pipe is to lower the level of the flow-induced noise in it, and measuring its characteristic parameter exactly is the basic insurance to accomplish the noise mechanism research, noise design, verification of the noise control methods and the selection of the equipments. The flow-induced noise of the nautical mechanical-electrical equipments is determined by their operation states and the pipe systems, and if both of them are determined, the characteristic parameter of the flow-induced noise is also determined. The research objective of this dissertation is to study the theory and method which can be used to measure such determinate acoustical characteristic parameter, to establish an experimental system for the verification of the measurement theory and method, and then to apply them in the experimental research of the flow-induced noise of the centrifugal pump. The research work in the relative fields are reviewed at first, all kinds of measurement theories are compared with each other, the linear superposition two-port model(LSTPM) which can be used to describe the flow-induced noise of the centrifugal pump exactly is determined, the coupling relationship between the sound source and the boundary condition in the pipe system is studied and the criterion of less couple between them is also referred, the relationship between the numerical result and the elements of the passive two-port matrix of the sound source subsystem and the arithmetic to extract the characteristic parameter of the sound source based on the LSTPM are studied, the experimental pipe systems filled with air and water are established respectively and the experimental results are in consistent with the theoretical ones. Finally considering the centrifugal pump, one of the typical nautical mechanical-electrical equipments, as a research subject, an appropriative experimental system on which the flow-induced noise can be measured is established, the relationship between the characteristic parameter of the centrifugal pump and the hydraulic parameters, such as the shaft rotation speed, the pressure in discharge and the imbalance of the rotation shaft are also studied, all of these supply the experimental theory and method to the mechanism research of the flow-induced noise in centrifugal pumps. Researches in this dissertation supply the experimental theory and method to solve the problem of measuring the characteristic parameter of the flow-induced noise in the theoretical research, noise design and refinement, they are also essential in the study of the sound propagation in pipe system and the establishment of the measurement criterion of the flow-induced noise of the nautical mechanical electrical equipments. Finally some proposals including the research direction in the future and the problems which still need to be studied are referred as well. |
| 语种 | 中文 |
| 公开日期 | 2011-05-07 |
| 页码 | 111 |
| 源URL | [http://159.226.59.140/handle/311008/942]  |
| 专题 | 声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文 |
| 推荐引用方式 GB/T 7714 | 冯涛. 离心泵流动噪声的测量研究[D]. 中国科学院声学研究所. 中国科学院声学研究所. 2004. |
入库方式： OAI收割
来源：声学研究所
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