西华大学学报（自然科学版）2026，Vol.45Issue(4)：21-30,38,11.DOI:10.12198/j.issn.1673-159X.5898
发电机组通风系统风速场分析
Analysis of Airflow Velocity Field in Generator Unit Ventilation System
摘要
Abstract
To evaluate the overall flow field characteristics of a generator unit,a calculation model of the external flow field of the entire generator unit was established based on the CFD method using the fluid analysis software STAR-CCM+,and the air volume distribution,component velocity field,and cross-sec-tion velocity field were comprehensively analyzed.The results indicate that the air velocity at the fan outlet is relatively high,and the cooling air is guided to the cylinder head and the crankcase air duct through the air-guiding effect of the fan cover to cool the engine.The maximum airflow velocity at the engine heat sink can reach 10 m/s,and the airflow velocity distribution at the bottom of the crankcase is relatively uniform,with an airflow velocity of 6-8 m/s.The overall flow field velocity distribution of the generator unit is uni-form,and there is no obvious flow dead zone.The airflow velocity on the surface of the engine(cylinder head,crankcase bottom,and crankcase body)is evenly distributed,without hot air backflow.The airflow velocity distribution on the surfaces of the electronic stator and muffler is relatively good,which is condu-cive to the cooling of high-temperature components.The layout of air inlets of the generator unit is dis-cussed.After the five air inlets are changed to two,the total air intake volume of the generator unit de-creases from 75.07 g/s to 62.12 g/s,with a reduction of 12.95 g/s(decreasing by 17.3%).The airflow velo-city on the surfaces of the frequency converter and motor stator increases significantly,while that on the surfaces of the engine and muffler decreases.The layout of air inlets and outlets has a significant impact on the overall flow field.Therefore,the positions of the air inlets and outlets should be reasonably selected based on the design requirements of the cooling system of the generator unit to ensure its cooling.The re-search results can provide simulation data support and method reference for the design and structural im-provement of the cooling system of the generator unit.关键词
发电机组/风速场分布/数值模拟/总风量/结构改进/冷却性能Key words
generator unit/airflow velocity field distribution/numerical simulation/total air volume/structural improvement/cooling performance分类
能源科技引用本文复制引用
谭礼斌,王张钰,袁越锦..发电机组通风系统风速场分析[J].西华大学学报（自然科学版）,2026,45(4):21-30,38,11.基金项目
四川轻化工大学人才引进项目(2025RCZ068) （2025RCZ068）
国家自然科学基金项目(51876109). （51876109）
