中国电机工程学报2018，Vol.38Issue(3)：832-839,后插18,9.DOI:10.13334/j.0258-8013.pcsee.161837
组合弯头内气固两相流动磨损特性的数值模拟与结构优化
Numerical Simulation of the Erosion Characteristics and Structure Optimization of Elbows Connection for Gas-solid Flow
摘要
Abstract
In pulverized coal power plants, the flow in flue ducts and pulverized coal piping is gas-solid flow with high Reynolds number. The flow and erosion characteristics in the pipelines influence the performance of flue and pulverized coal system. Continuous layout of elbows is often necessary due to the restriction of outer space. And connection length between elbows is short at this point. The interaction between two elbows can influence the flow field and erosion pattern in elbows connection structure. In present paper, discrete phase model (DPM) model and Tulsa Erosion/ Corrosion Research Center (E/CRC) erosion model were adopted to simulate the flow and erosion characteristics in two kinds of elbows connection. The flow field, erosion distribution and the most eroded position in these two elbows connection were obtained. Moreover, the influence of connection length on erosion rate was also analyzed. Structure optimization was conducted based on the erosion pattern of pipe wall. Results suggest that for Z-type elbows connection,L/D=2 can yield small erosion rate. But forΠ-type elbows connection, direct connection (L/D=0) is most recommended.关键词
组合弯头/气固两相流/冲蚀磨损/结构优化/数值模拟Key words
elbows connection/gas-solid flow/erosion/structure optimization/numerical simulation分类
通用工业技术引用本文复制引用
王宇,何琪,于飞,刘明,严俊杰..组合弯头内气固两相流动磨损特性的数值模拟与结构优化[J].中国电机工程学报,2018,38(3):832-839,后插18,9.基金项目
国家重点基础研究发展计划项目(2015CB251504) （2015CB251504）
国家自然科学基金项目(51406006). The National Basic Research Program of China (2015CB251504) （51406006）
Project Supported by National Natural Science Foundation of China (51436006). （51436006）
