往复压缩机管路中T型三通的气流脉动动力学特征研究

摘要

往复压缩机间歇性吸、排气的工作特性,使管网内形成压力和速度呈周期性变化的气流脉动成为激发管网振动的主要原因,严重影响了压缩机组的平稳运行.以平面波动理论为基础,研究了T型分流三通这一重要管件对压缩机管网内部气流脉动的影响,建立了包含T型分流三通的管路气流脉动传递矩阵.运用CFX进行流体动力学仿真,通过分析管路内的压力分布与流场分布,研究了分流三通主干管路与分支管路直径比的变化对管路内气流脉动的影响.%The gas pulsation caused by intermittent operation of reciprocation compressor severely affects stable operation of the compressor and it is the main reason of the piping vibration.Based on the plane wave theory,the tee junction's effect on the gas pulsation within compressor's pipe network was discussed and the transfer matrix of the air pulsation in the pipeline's tee junction was established.Through making use of CFX to do the computational fluid dynamics simulation and analyzing both pressure distribution and flow field distribution within the pipeline,the influence from the change of diameter ratio of tee junction's main pipeline and branch pipeline on the gas pulsation within the pipeline was discussed.