化工学报 ›› 2022, Vol. 73 ›› Issue (6): 2649-2661.doi: 10.11949/0438-1157.20211701
李铁男1,2(),赵碧丹2,3,赵鹏2,3,张永民1(
),王军武2,3,4(
)
Tienan LI1,2(),Bidan ZHAO2,3,Peng ZHAO2,3,Yongmin ZHANG1(
),Junwu WANG2,3,4(
)
摘要:
流化床启动阶段内构件会受到较大的破坏性载荷冲击,为了保障流化床内构件的长周期可靠性,需要掌握这个阶段内构件在流化床内的受力特性。首先提出了一种统计内构件表面受力的方法,将微观颗粒-挡板作用信息转换为宏观挡板受力载荷信息。在此基础上采用CFD-DEM方法,统计分析了流化床启动阶段床层中水平挡板内构件的受力载荷特性。研究结果表明:CFD-DEM方法可半定量复现实验中启动阶段内构件表面受到的动态载荷信号,并复现了表观气速和颗粒粒径对挡板峰值载荷强度的影响规律。本研究证明了内构件表面受力载荷强度统计方法的正确性和CFD-DEM统计分析受力载荷的可行性。
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