谢枭炀,齐高华,陈立,沈中杰,许建良,代正华,刘海峰

• 1:华东理工大学国家能源煤气化技术研发中心
• 2:新疆山能化工有限公司
• 3:辽宁石油化工大学

摘要(Abstract)：

气流床气化是生物质废弃物资源化利用的有效方式，破碎制粉的大尺度非球形生物质颗粒在气化炉内流动行为对气化性能影响显著。文中以工业制备的秸秆生物质颗粒为对象，采用数值模拟对气化炉内大尺度生物质颗粒的曳力特性进行研究，考察了长径比(2～10)、颗粒雷诺数(10～1 000)以及攻角(0°～90°)对曳力系数的影响。结果表明，长径比对曳力的影响受攻角与颗粒雷诺数的严格耦合控制：除特定大雷诺数小攻角工况外，长径比增大会导致曳力系数增大，且随着攻角增大或雷诺数减小，长径比的影响增强。基于模拟结果，本研究提出了包含长径比的多参数耦合生物质颗粒曳力系数模型。该模型与传统曳力系数模型相比，具有更高的精度和更宽的适用范围，对指导生物质气流床气化炉结构开发具有重要意义。

关键词(KeyWords)： 非球形颗粒;长径比;曳力系数;数值模拟;气流床气化;气固两相流

Abstract:

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基金项目(Foundation): 2023年度新疆维吾尔自治区重点研发计划（2023B01013）

作者(Author): 谢枭炀,齐高华,陈立,沈中杰,许建良,代正华,刘海峰

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