| 王磊，马建，杨志刚，张文博，侯峨明.旋流式进气系统性能分析及设计方法[J].内燃机工程,2017,38(1):88-93. |
| 旋流式进气系统性能分析及设计方法 |
| Performance Analysis and Design Method of Whirl-Type Inlet System |
| DOI： |
| 关键词:内燃机 商用车 进气系统 流动特性 数值模拟 旋流管 两相流 |
| Key Words:IC engine commercial vehicle inlet system flow characteristics simulation swirl-type tube two phase flow |
| 基金项目:国家“八六三”高技术研究发展计划项目（2012AA111106） |
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| 摘要:针对国产重型商用车辆旋流式进气系统进行研究分析，了解其内部气流特性并使其可视化。模拟车辆行驶时驾驶室后侧流场，发现车体外侧压力区域稳定，内侧区域压力比外侧低，气流存在向内部流动的趋势；侧向进气管道主流道顶部直角设计会造成气流在此区域旋流，气流流动性差，进行圆角过渡设计后流动明显顺畅且无旋流产生；与四叶片相比，六叶片旋风筒的中心低压区域较大，其内部粒子运动趋势与管内压力分布基本一致，中心存在无粒子区，六叶片旋风筒内粒子旋转区域更靠近壁面且区域较薄；百叶窗在正面投影全封闭状态下阻隔粒子性能最好。 |
| Abstract:The air flow characteristics in the whirl-type inlet system of a domestic heavy commercial vehicle were studied and its visualization was made. Through the simulation of rear side flow field of a moving vehicle cab, it is discovered that there is a stable pressure region outside the vehicle body， in which the inner pressure is lower than the outer pressure， and the air flow has a tendency to flow inward. A right angle design at the top of the main duct of lateral inlet pipe can cause whirl flow in this area， which makes the flowability of air flow worse， while the fillet transition design can make the flow of airflow smoothly without whirl flow. Compared with the four-blade cyclone， the central low-pressure area of six-blade cyclone is relatively large， and the movement trend of internal particles is basically consistent with that of the in-pipe pressure distribution， and there is no particle area at the center while the particle-rotation area is relatively thin and closer to the wall. The shutter can provide the best particle-obstructing performance in the fully closed state of front projection. |
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