摘要
采用数值模拟的方法研究了烟气轮机内的催化剂颗粒沉积过程。在计算流体力学软件Fluent中,采用RNG k-ε湍流模型计算烟气轮机内气相流场。在流场模拟的基础上,应用自定义函数修正了固有的沉积模型,模拟不同Stokes数颗粒的沉积特性。模拟结果表明,小Stokes数的催化剂颗粒沉积速率较大,静叶吸力面、动叶压力面及动叶吸力面轮毂和机壳附近是颗粒沉积的主要区域;大Stokes数的催化剂颗粒沉积区域主要分布在静叶压力面和动叶压力面,分布比较均匀,但沉积速率较小。工业条件下应尽量避免小Stokes数颗粒进入烟气轮机,保障烟气轮机安全长周期运行。
The catalyst particles deposition process in the flue gas turbine was studied by numerical simulation.In this paper,the Fluent software was used to simulate the gas phase movement in a flue gas turbine with the RNG k-εturbulence model.And then,user defined function was loaded to modify the default deposition model in Fluent solver.The deposition characteristics of particles with different Stokes numbers were analyzed.Simulation results show that particles with small Stokes number are easily deposited;suction surface of vanes and pressure surface of blades are main areas where deposition occurs;high deposition rate takes place on zones near the hub and casing on suction surface of blades.Particles with large Stokes number are mainly deposited on the pressure surface of vanes and blades,and deposits distribute uniformly with a low deposition rate.Small Stokes number particles should be avoided to enter the flue gas turbine to ensure its safe and long-term operation.
作者
潘静娜
王建军
陈帅甫
徐书根
PAN Jingna;WANG Jianjun;CHEN Shuaifu;XU Shugen(College of Chemical Engineering,China University of Petroleum,Qingdao 266580,China)
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2018年第5期967-974,共8页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
山东省自然科学基金项目(ZR2015EM026)资助
关键词
沉积特性
烟气轮机
数值模拟
气-固两相流
deposition characteristics
flue gas turbine
numerical study
gas-solid two-phase flow
