In this paper, a new combustor with an output of 5 t/h is designed based on a computational particle fluid dynamics (CPFD) model. The flow field simulation is combined with the combustion simulation to analyze the internal two-phase flow, temperature field, and combustion products. The combustor structure was optimized. The simulation results show that the recovery efficiency of the waste sand and the energy utilization of the combustor can be improved under the original structure. The sand bed has a significant effect on flow field characteristics. The increase in particle temperature in the combustor increases the efficiency of waste sand recovery by increasing the height of the sand bed by 50 mm. The utilization rate of natural gas is increased and the economic efficiency is improved. The feasibility of the CPFD method can simulate the flow field characteristics inside the combustor very effectively.

中文翻译：

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3D打印砂回收系统燃烧室结构数值模拟与改进

本文基于计算粒子流体动力学（CPFD）模型设计了一种输出量为 5 t/h 的新型燃烧器。流场模拟与燃烧模拟相结合，分析内部两相流、温度场和燃烧产物。优化了燃烧室结构。模拟结果表明，在原有结构下，可以提高废砂的回收效率和燃烧室的能量利用率。砂床对流场特性有显着影响。燃烧室中颗粒温度的升高通过增加砂床高度50毫米来提高废砂回收效率。提高天然气利用率，提高经济效益。CPFD方法的可行性可以非常有效地模拟燃烧室内部的流场特性。