Song Bo, Chen Hongliang, Sun Long, Xu Kunpeng, Ren Xiaoyong
Digital and Intelligent Industry Center, CCTEG Shenyang Engineering Company, Shenyang 110013, China.
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110013, China.
Materials (Basel). 2024 Dec 9;17(23):6020. doi: 10.3390/ma17236020.
The air film thickness is an important parameter of an air cushion belt conveyor, which directly affects the compressed air supply power and operating resistance of the system. Therefore, it is important to calculate the bottom thickness of the gas film accurately in the design stage. A calculation method for the thickness of a conveyor air cushion was derived based on the mathematical model of the air cushion flow field for a multi row uniformly distributed air cushion structure. Meanwhile, the algorithm was validated based on a Fluent 3D flow field numerical simulation and experiments. Through verification, it was found that due to the algorithm's assumption that the increase in the gas flow rate only existed at the axis of the gas hole, there was a sudden change in the calculation results of the gas flow rate at the axis of the gas hole. The sudden change in the gas flow rate had caused the calculation results of the air cushion thickness to experience abrupt and discontinuous changes. Furthermore, the calculation method for air cushion thickness was revised based on the verification results. Compared with the experimental test results, the average error of the calculation results of the algorithm proposed in this paper was 14.27%.
气膜厚度是气垫带式输送机的一个重要参数，它直接影响系统的压缩空气供应功率和运行阻力。因此，在设计阶段准确计算气膜底部厚度很重要。基于多排均匀分布气垫结构的气垫流场数学模型，推导了输送机气垫厚度的计算方法。同时，基于Fluent三维流场数值模拟和实验对该算法进行了验证。通过验证发现，由于该算法假设气体流速的增加仅存在于气孔轴线上，导致气孔轴线处气体流速的计算结果出现突变。气体流速的突变使得气垫厚度的计算结果出现突然且不连续的变化。此外，根据验证结果对气垫厚度的计算方法进行了修正。与实验测试结果相比，本文提出的算法计算结果的平均误差为14.27%。
