摘要
利用FLUENT对某挖掘机消声器的设计制造进行仿真分析,研究了该消声器内部流场的温度、压力、速度的分布,分析了不同的入口速度下压力损失的变化。发现消声器内部流速较均匀,气流速度变化比较缓和,没有变化剧烈的区域。每个扩张腔内气流撞击壁面后有反射,有利于削弱噪声能量,达到消声效果;消声器各扩张腔内部温度变化比较大,第一腔内温度变化最大;消声器各扩张腔内部压力维持不变,压力损失比较大的区域为2个内插管入口处,这说明扩张腔在整个消声器中造成的压力损失是比较小的。随着入口速度增加,消声器的压力损失呈抛物线增大。
The internal flow field of the muffler the distribution of temperature, pressure and velocity is studied by simulation analysis by FLUENT. Found that the internal flow velocity is relatively uniform, the change of the air velocity is relatively moderate, no change in the region. Each of the expansion chamber of the air impact of the wall after the reflection, is conducive to weaken the noise energy, to achieve the effect of noise elimination, the internal temperature changes is large in the muffler expansion chamber, the first chamber temperature change the most large, the internal pressure of the expansion chamber is unchanged, the pressure loss relatively large is two internal insert pipe inlet, which shows that the pressure loss caused by the entire muffler is relatively small. With the increase of the inlet velocity, the pressure loss of the muffler increases.
出处
《柴油机设计与制造》
2016年第2期14-18,共5页
Design and Manufacture of Diesel Engine
