数值模拟秸秆热解过程影响要素及其应用分析

Influencing factors and their application analysis in numerical simulation of straw pyrolysis

为进一步明确秸秆热解过程的影响因素及其相互作用,本研究系统分析2000—2018年国内外秸秆热解研究的相关文献,总结秸秆热解研究中存在的问题。从数值模拟分析的角度对影响秸秆热解过程的因素进行归纳分类,分析数值模拟中需要考虑的因素及其应用,如基于非稳态数值模拟可实时监测秸秆热解过程中装置内部瞬时温度分布、挥发分流动路径、秸秆颗粒流动规律及浓度分布等瞬态物理量变化。阐述将CFD数值模拟与试验测试、理论推导相结合来研究秸秆热解的必要性,并分析此种研究方式的可行性。

In order to further clarify the influencing factors of straw pyrolysis process and their interactions,this study systematically analyzed the current literatures on straw pyrolysis at home and abroad,and summarized the problems existing in the research of straw pyrolysis.From the perspective of numerical simulation analysis,the factors affecting the straw pyrolysis process were summarized and classified,and the factors that need to be considered in the numerical simulation and their applications were analyzed.For example,the instantaneous temperature distribution,volatile flow path,straw particle regular flow path and concentration distribution,and other transient physical quantity changes during the straw pyrolysis process can be monitored in real time based on unsteady numerical simulation.The necessity of combining CFD numerical simulation with experiments and theoretical derivation to study the pyrolysis of straw is expounded,and the feasibility of this research method is analyzed.