CAJ | 학술논문

基于雷诺平均纳维-斯托克斯方程与Realizableκ-ε双方程湍流模型，利用CFD软件建立了某大型涡轮增压器离心式压气机内部气体的可压缩流动仿真模型。分析了不同工况下压气机内部气流的速度、压力等流动特性，利用宽带噪声模型对压气机进行了气动噪声源数值研究。结果表明，叶轮区域是压气机的主要气动噪声源；压气机内扰动强度和叶轮转速是气动噪声声功率的主要影响因素；宽带噪声与湍流强度的分布趋势一致。研究结果对分析压气机的气动噪声源产生机理及其控制具有参考价值。
기우뢰낙평균납유-사탁극사방정여Realizableκ-ε쌍방정단류모형，이용CFD연건건립료모대형와륜증압기리심식압기궤내부기체적가압축류동방진모형。분석료불동공황하압기궤내부기류적속도、압력등류동특성，이용관대조성모형대압기궤진행료기동조성원수치연구。결과표명，협륜구역시압기궤적주요기동조성원；압기궤내우동강도화협륜전속시기동조성성공솔적주요영향인소；관대조성여단류강도적분포추세일치。연구결과대분석압기궤적기동조성원산생궤리급기공제구유삼고개치。
Based on the Reynolds-averaged Navier-Stokes equation and Realizable two-equation turbulence model ,the com-pressible flow model of internal air in a large turbocharger compressor was built by CFD software .The flow characteristics of internal flow velocity and pressure were analyzed in different operating conditions and aerodynamic noise source of compressor was studied by broadband noise model .The results show that the impeller region is the main source of aerodynamic noise .The disturbance intensity and the impeller speed are the dominant influential factors of aerodynamic noise sound power .Besides ,the distribution trend of broadband noise is the same as that of turbulence intensity .The research results provide the important ref-erence for the mechanism analysis and control of aerodynamic noise source .