力学与实践 ›› 2022, Vol. 44 ›› Issue (4): 820-826.DOI: 10.6052/1000-0879-22-196

• 生物质流化床热化学转化模拟研究专题 • 上一篇    下一篇

化学链分级气化燃料反应器气固流动数值模拟

郭月*, 崔颖, 宋涛*, 卢平*, 殷上轶*()   

  1. *. 南京师范大学能源与机械工程学院,南京 210023
    †. 东南大学能源与环境学院,南京 210096
  • 收稿日期:2022-03-31 出版日期:2022-08-08 发布日期:2022-08-17
  • 作者简介:殷上轶,副教授,研究方向为气固两相流动及数值模拟。E-mail: syyin@njnu.edu.cn
  • 基金资助:
    国家自然科学基金(51906113)和江苏省自然科学基金(BK20190707)资助项目。

NUMERICAL SIMULATION OF GAS-SOLID FLOW IN CHEMICAL LOOPING GRADED GASIFICATION FUEL REACTOR

GUO Yue*, CUI Ying, SONG Tao*, LU Ping*, YIN Shangyi*()   

  1. *. School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China
    †. School of Energy and Environment, Southeast University, Nanjing 210096, China
  • Received:2022-03-31 Online:2022-08-08 Published:2022-08-17

摘要:

本文基于多相粒子单元法对化学链分级气化燃料反应器(下部为气化反应器,上部为重整反应器)开展了气固流动数值模拟研究,验证了曳力模型、模型参数(法向和切向颗粒–壁面碰撞恢复系数ewne)对计算结果的敏感性,并确定了合适的曳力模型及模型参数。探究了表观气速和两床接口处狭缝尺寸对颗粒连通量的影响规律,研究结果表明:颗粒连通量随表观气速的增加而增加,随狭缝尺寸的增加而减小。

关键词: 化学链分级气化, 气固流动, 多相粒子单元法, 敏感性分析

Abstract:

A numerical simulation of the gas-solid flow in a chemical looping gasification fuel reactor (the lower and upper part is designed as gasification and reforming reactor respectively) was carried out in this paper based on the multiphase particle-in-cell (MP-PIC) method. The sensitivity of the drag force model and the model parameters (normal-to-wall and tangent-to-wall momentum retention ewn and e) to the simulation results were verified, and appropriate models along with model parameters are determined. The effect of gas velocity and slit size at the interface between the two beds on the particle flux was investigated. The results show that the particle flux increases with gas velocity but decreases with slit size.

Key words: chemical looping graded gasification, gas-solid flow, multiphase particle-in-cell method, sensitivity analysis

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