Xu Cuicui, Jia Xinyu, Jing Jingjing, Wang Junpeng, Mi Qingyi, Zhou Gang, Wu Lirong
College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology-Beijing, Beijing, 102206, China.
Sci Rep. 2024 Nov 6;14(1):27002. doi: 10.1038/s41598-024-75615-7.
The droplet breakup and distribution of the internal flow field and external spray field of a nozzle were obtained under different pressures. The thickness of the liquid film increased with pressure as a quadratic function. The maximum value of 0.281 mm at 2 MPa decreased to 0.172 mm at 10 MPa, equivalent to 38.8% decrease. The MATLAB was used to obtain the particle size distribution characteristics of the droplets under different pressures. At 2 MPa, droplet breakup dominated the axial interval [0-700 mm]. With the increase of pressure, D distribution as a whole continues to decrease, 2-6 MPa change, the particle size reduction is larger, every increase of 2 MPa reduced by about 15%. 6-10 MPa change, the particle size reduction is smaller, every increase of 2 MPa reduced by about 8%. A model to predict the optimal dust reduction areas under varying pressures was developed. The prediction results indicate that at pressures of 5 MPa and 9 MPa, the target dust removal areas were [344 mm, 710 mm] and [424 mm, 942 mm] along the axial direction, respectively.
在不同压力下获得了喷嘴内部流场和外部喷雾场的液滴破碎及分布情况。液膜厚度随压力呈二次函数增加。在2MPa时最大值为0.281mm，在10MPa时降至0.172mm，相当于减少了38.8%。使用MATLAB获得了不同压力下液滴的粒径分布特征。在2MPa时，液滴破碎主要发生在轴向区间[0 - 700mm]。随着压力增加，D分布整体持续下降，在2 - 6MPa变化时，粒径减小较大，每增加2MPa约减小15%。在6 - 10MPa变化时，粒径减小较小，每增加2MPa约减小8%。建立了一个预测不同压力下最佳降尘区域的模型。预测结果表明，在5MPa和9MPa压力下，沿轴向的目标除尘区域分别为[344mm, 710mm]和[424mm, 942mm]。
