基于 CFD 的闭式机舱通风系统三维数值模拟

摘要

In order to pre-determine the ventilation effectiveness of the closed cabin ventilation system and to identify the potential problems in airflow organization or temperature distribution in the preliminary design,the steady three-dimensional turbulent flow inside the ventilation system is simulated via CFD. Then,several substantial improvements on the system are made,which includes the addition of inlet and outlet vents in the front wall of the engine rooms and changing the airflow direction on both sides. The test result is highly consistent with the estimation from empirical formulas and shows that the proposed optimi⁃zation scheme significantly improves the airflow organization and ventilation effectiveness.%　　为预先确定工程设计中闭式机舱通风系统的通风效果，找出初步设计方案中气流组织与温度分布存在的问题，对系统内部三维湍流进行基于 CFD 的三维数值模拟。在此基础上，于机舱前壁合理增设布风口与排风口，并将舷侧的进、排气方向予以合理改进，形成良好的气流组织。计算结果表明，改进后的通风方案效果良好，消除了初步设计方案中存在的问题。