汽车空调流体管路的气动噪声分析与优化
Numerical Analysis and Optimization of Aerodynamic Noise of Automotive Air Conditioning Duct
万里翔 1闵海娇 1刘晓昂 2王新玲2
作者信息
- 1. 西南交通大学机械工程学院,四川 成都 610031
- 2. 雪龙集团有限公司,浙江 宁波 315806
- 折叠
摘要
以汽车空调风道为研究对象,在Fluent中采用RNG模型和LES模型对管路进行稳态和瞬态计算,对风道出口风量进行试验验证,并采用声类比法计算风道出风口的噪声.根据仿真分析结果,采用响应面法,以出风口1管路的转角半径、出风口2管路左、右管壁的移动距离为设计变量,以出风口2的风量占比为优化目标对空调管路的结构进行优化.最后对优化前、后的管路进行了流场和声场对比分析.结果表明,与原模型相比,优化后风道出风口2的风量比例由20.75%提升到了25.25%,出风口的噪声下降最大值为5.15dB.
Abstract
Taking the automobile air-conditioning duct as the research object,the RNG model and LES model are used in Flu-ent to calculate the steady-state and transient state of the duct,the air volume at the outlet of the duct is tested and verified,and the acoustic analogy method is used to calculate the noise at the outlet of the duct.According to the results of the simulation analy-sis,the structure of air-conditioning duct is optimized by response surface method which took the corner radius of the air outlet 1 pipeline,the movement distance of the left and right pipe walls of the air outlet 2 pipeline as design variables,and considered the air volume ratio of the outlet 2 as the optimized purpose.the prototype and improvement duct are compared and analyzed.The re-sults show that compared with the original model,the air volume ratio of the optimized pipeline at outlet 2 has been increased from20.75%to25.25%,and the maximum noise reduction at the outlet is5.15dB.
关键词
空调风道/气动噪声/计算流体力学/响应面法Key words
Air Conditioning Duct/Aerodynamic Noise/Computational Fluid Dynamics/Response Surface Method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据