水下气体射流噪声产生机理与控制研究

项目名称： 水下气体射流噪声产生机理与控制研究

项目编号： No.51206101

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 工程热物理与能源利用学科

项目作者： 郝宗睿

作者单位： 山东省科学院

项目金额： 25万元

中文摘要： 水下排气过程涉及了复杂的多相流动，伴有层流转捩、旋涡运动和流态变化等复杂现象，其噪声产生机理有别于空气排气噪声机理，因此在水下排气消声器设计前应首先掌握其噪声的频谱特性及影响因素。本项目将在已有工程管路水下排气噪声研究的基础上，研究水下气体射流场的流动演化规律，分析其辐射噪声与两相流场流动特征之间的内在联系，探索水下气体射流辐射噪声的产生机理。项目以水下气体射流的辐射声场为研究对象，展开水下气体射流场及辐射声场的试验及数值模拟研究，揭示水下两相射流场流动演化机理及辐射噪声特性；研究水下气体射流过程中辐射声场的描述方法，建立水下气体射流两相流场及辐射声场的数值模拟方法；通过试验和数值方法研究喷管结构、环境被压、掺水量等影响因素对水下气体射流辐射噪声的影响，建立各个参数间的无量纲关系，完善水下气体射流噪声控制理论及方法，为水下排气消声装置的设计及优化提供依据，为水下射流噪声的控制提供理论基础。

中文关键词： 水下喷气；气液流场；辐射噪声；噪声控制；消声器

英文摘要： Underwater exhaust process involves complex multiphase flows, which accompanied by associated complex phenomenon of layer flow transition, vortex motion and flow pattern changes. The noise generation mechanism is different from the generation mechanism of air exhaust noise. Therefore, in order to design the underwater exhaust muffler, spectrum characteristics of noise and its influence factors must be well studied. This project is proposed based on the former study of project pipeline underwater exhaust noise. In this project, the evolution of underwater gas jet flow will be analyzed, and the intrinsic link between the radiation noise and flow characteristics of two-phase flow field will be researched, then, the underwater the generation mechanism of gas jet radiated noise will be explored. The radiated sound field of underwater gas jet is the main study object of this project. Experiments and numerical simulation on the underwater gas flow field and radiated sound field are combined to reveal the evolution mechanism of underwater two-phase flow field flow and the radiation noise. The numerical simulation methods of underwater jet gas phase flow field and radiation sound field will be established based on the study of description methods of radiation sound field during the underwater gas jet process. The influen

英文关键词： underwater gas jet；gas-fluid flow；radiated noise；noise control；muffler