船舶汽轮机蒸汽管路流动噪声源的声类比计算研究  

Aeroacoustics Simulation of Flow Induced Noise Sources inside the Steam Pipeline of Marine Turbine System

作　　者：强旭 许伟龙 王鹏[3] 刘应征[3] QIANG Xu;XU Wei-long;WANG Peng;LIU Ying-zheng(China-UK Low Carbon College,Shanghai Jiao Tong University,Shanghai,China,Post Code:201306;China Ship Research&Design Center,Wuhan,China,Post Code:430064;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai,China,Post Code:200240)

机构地区：[1]上海交通大学中英国际低碳学院,上海201306 [2]中国舰船研究设计中心,湖北武汉430064 [3]上海交通大学机械与动力工程学院,上海200240

出　　处：《热能动力工程》2023年第4期7-15,共9页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(11802177)。

摘　　要：针对某船舶动力系统蒸汽调节管路在不同阀门启闭状态下的流动噪声源空间分布,开展了详细的计算气动声学数值研究工作。采用剪切应力输运湍流模型(SST,shear stress transport)获取了管内复杂三维蒸汽流场分布;结合Curle声类比模型和Proudman声类比模型分别计算得到管路壁面偶极子噪声源和管内流体域四极子噪声源分布特性。研究结果表明:相比于阀门关闭状态下的一进一出“T型”和“Z型”管路,阀门开启后的两进一出“h型”管路内流动噪声源强度上升明显;偶极子噪声源主要分布在管路汇聚处与出口弯管区域壁面,与此区域流体剪切应力相关;由于出口弯管直径突然变小,且流体流向发生变化,导致此处管内流场湍流度较高,故而产生了较为强烈的四极子噪声源。Aiming at the spatial location of the aerodynamic noise sources in the steam regulating pipe of a marine power system under different valve opening and closing conditions,a detailed numerical study of computational aeroacoustics was carried out.Shear stress transport(SST)turbulence model was used to obtain the complex three-dimensional steam flow field distribution in the pipe;combined with Curle acoustic analogy model and Proudman acoustic analogy model,the distribution characteristics of dipole noise source on the pipe wall and quadrupole noise source in the fluid domain of the pipe were calculated respectively.The research result shows that compared with T type and Z type pipelines with one inlet and one outletwhen the valve is closed,the intensity of aerodynamic noise source"h"type pipeline with two inlets and one outlet increases significantly after the valve is open.Among them,the dipole noise source is mainly distributed in the pipeline convergence and the wall of outlet elbow area,which is closely related to the local fluid shear stress.The quadrupole noise source is mainly located in the outlet elbow,which is strongly related to higher turbulent kinetic energy distribution of flow field in pipe caused by suddenly becoming small of elbow diameter and the change of flow direction.

关 键 词：蒸汽动力管路 流动噪声源 计算气动声学 Curle声类比模型 Proudman声类比模型 

分 类 号：TH134[机械工程—机械制造及自动化]