摘要
对某型船重点舱室大会议室通风系统进行精细化提升,基于Lighthill声学理论推导出的适合流体边界中运动固体边界条件的FW-H方程得出噪声研究理论,并通过计算流体软件,对低流速流场中的噪声主要来源偶极子声源的气流流场、流速、流动均匀性和压力变化等进行分析。通过23次模型提升与仿真计算,挑选其中几代典型模型优化方案进行仿真分析与验证。结果表明:在送风量不变的情况下,送风装置末端最大出风速度降低22.2%,气流均匀性方差值降低99.6%,装置性能有了极大的提升。
Refined improvement of ventilation system for key cabins and large conference rooms of a certain type of ship is made.Based on the FW-H equation derived from Lighthill acoustic theory,which is suitable for the boundary conditions of moving solids in fluid boundaries,a noise research theory is derived.Through computational fluid software,the main sources of noise in low velocity flow fields are analyzed,including the airflow field,velocity,flow uniformity,and pressure changes of the dipole sound source.Through 23 generations of model upgrading and simulation calculations,several typical model optimization schemes are selected for simulation analysis and verification.The results show that the max current speed at the end of ventilating device declined 22.2%,variance of flow even declined 99.6%under the condition of same air supply volume.The performance of the device has been greatly improved.
作者
唐高锋
李超
张金龙
TANG Gaofeng;LI Chao;ZHANG Jinlong(Jiangnan Shipyard(Group)Co.,Ltd.,Shanghai 201913,China;The First Military Representative Office of the Shanghai Bureau of the Naval Equipment Department in Nanjing,Nanjing 210000,China)
出处
《机电设备》
2023年第2期63-68,共6页
Mechanical and Electrical Equipment
关键词
计算流体力学
通风系统
气流噪声
仿真验证
computational fluid dynamics(CFD)
ventilation system
airflow noise
simulation verification
