防腐型弯管前置扰流子的数值模拟  

Numerical Simulation of Anticorrosive Elbow Pipe Prepositive Turbolator

作　　者：任丽丽[1] 陆晓峰[1] 

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816

出　　处：《轻工机械》2014年第1期28-31,41,共5页Light Industry Machinery

摘　　要：流动加速腐蚀现象广泛地存在于过程工业装置的流体输运管路中，通过在弯管前加装扰流子可以改善弯管内壁面的压力系数分布。降低弯管的流动加速腐蚀速率。文章应用CFD软件FLUENT6．3，对弯管前置扰流子进行数值模拟，研究其结构参数和安装尺寸对弯管内壁外弯侧面压力系数的影响，结果表明：加装扰流子之后，弯管中心面的最大压力系数随着叶片弦长的减小而降低；当安装攻角a在1°～2°之间，压力系数减小，当a大于2°时，弯管中心面的最大压力系数随着攻角的的增大而增大，从2°到6°增大了约100Pa；当安装距离Z在0—10mm之间，弯管中心面外侧的最大压力系数减小，呈现良好的趋势。之后，随着安装距离的增大，最大压力系数反而增大了约90Pa。The phenomenon of flow accelerated corrosion widely exists in pipeline of fluid conveying of process industry equipment. It can reduce the flow accelerated corrosion rate of elbow pipe by the way of improving the distribution of wall pressure coefficient through installing a prepositive turbolator for the elbow pipe. In order to study the effect of structure parameters and mounting dimension on the pressure coefficient of outer of a mid-plane of elbow pipe, the numerical simulation using CFD software FLUENT6. 3 was carried out. The results show that： After installing a prepositive turbolator for the elbow pipe, the maximum pressure coefficient of a mid-plane of elbow pipe decrease with the decrease of the blade chord; When the installation Angle of attack a is from 1° to 2°, the maximum pressure coefficient decreases, as the a is greater than 2°, the maximum pressure coefficient increases as the increase of the Angle of attack, and the incensement is about 100 Pa from 2° to 6° ;When the mounting distance l is between 0 mm and 10 mm, the maximum pressure coefficient of a mid-plane of elbow pipe decreases, and displays a good trend. Later, with the increase of mounting distance, the maximum pressure coefficient increases and the increasement is about 90 Pa.

关 键 词：弯管 扰流子 防腐 数值模拟 

分 类 号：TG172.2[金属学及工艺—金属表面处理]