摘要
为了研究6 kW静音型柴油发电机组排风通道结构对空气流动阻力的影响,通过计算流体力学方法(CFD)分析排风通道内流体模型的压力场和流场分布,研究了排风通道内风阻的影响因素。通过改变阻风板、消声器相对位置和排风出口形状、尺寸,对比风阻变化及流体流速变化。结果表明移动阻风板,扩大排风通道体积及移动消声器相对阻风板的距离可以减小风阻,同时增大排风出口处U型挡板宽度可以减小风阻,当不考虑排风出口处吸音海绵表面粗糙度时其厚度对风阻影响不大。为排风通道结构设计和优化提供理论依据。
In order to study the impacts on the air resistance which from the structural parameters of exhaust chan- nel in 6 kW silent canopy diesel generator set, the pressure field and flow field of the exhaust channel are analyzed with the help of the Computational fluid dynamics （CFD） method to study the factors which affect the air resist- ance. By changing the location of the wind resistance board or the muffler, the size of exhaust export shape, air flu- id model in the exhaust channel is numerically simulated and the results of air resistance and flow field are com- pared. The results show that air resistance can be reduced by moving the wind resistance board to expand the ex- haust channel＇s volume, adjusting the location of muffler, increasing the distance between intakes and the U- shaped baffle can reduce air resistance; when the surface roughness of the sound-absorbing sponge isn＇t consid- ered ; changing the thickness has little effect on air resistance. sign and parameter optimization of exhaust channel. And it provides the theoretical basis for structure de-
出处
《机械科学与技术》
CSCD
北大核心
2013年第7期1006-1012,共7页
Mechanical Science and Technology for Aerospace Engineering
关键词
阻力
计算流体力学
模型
优化
computer simulation
optimization
flow fields
air resistance
computational fluid dynamics
model
exhaust channel
silent canopy diesel generator
