| ZHOU Da-peng,MA Xue-dong,DU Yu-lin,ZHANG Fan,CHEN Yan,WANG Hai-ling.Study on EDEM-Fluent Coupling Simulation of Nozzle Structure Parameters in Sandblasting Process[J],51(1):192-201, 211 |
| Study on EDEM-Fluent Coupling Simulation of Nozzle Structure Parameters in Sandblasting Process |
| Received:March 15, 2021 Revised:June 23, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.01.020 |
| KeyWord:structure of nozzle EDEM-Fluent coupling average sand production speed total sand production amount variance analysis F test |
| Author | Institution |
| ZHOU Da-peng |
School of Mechanical Engineering and Automation, University of Science and Technology, Anshan , China |
| MA Xue-dong |
School of Mechanical Engineering and Automation, University of Science and Technology, Anshan , China |
| DU Yu-lin |
School of Mechanical Engineering and Automation, University of Science and Technology, Anshan , China |
| ZHANG Fan |
School of Mechanical Engineering and Automation, University of Science and Technology, Anshan , China |
| CHEN Yan |
School of Mechanical Engineering and Automation, University of Science and Technology, Anshan , China |
| WANG Hai-ling |
Anshan Changhe Metallurgical Equipment Manufacturing Co.Ltd., Anshan , China |
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| Abstract: |
| This paper aims to study the influence rule and reason of the contraction angle, throat radius and diffusion angle of the nozzle on the average sand production speed and total sand production amount during the process of sandblasting. The EDEM-Fluent coupling model was used to simulate the gas-solid two-phase movement in the sandblasting nozzle, and the correctness of the model was verified by experiments. The simulation experiment was carried out by setting the orthogonal table with different structure sizes of nozzles. The analysis of variance method (F test) was used to analyze the variation rule of average sand production speed and total sand production amount at each factor level. The influence reason of throat radius on average sand production speed and total sand production amount was further explored by using the control variable method. From the variance analysis of the average sand production speed, the F value of throat radius to 3716.044 and the F value of contraction angle to 380.102, the average sand production speed increased rapidly with the increase of throat radius, but decreased with the increase of contraction angle; From the variance analysis of the total sand production amount, the F value of throat radius to 103.695 and the F value of contraction angle to 13.101, the total sand production amount decreased rapidly with the increase of throat radius, but increased slowly with the increase of contraction angle; When the contraction angle and diffusion angle were invariable, the negative pressure increased with the increase of throat radius, resulting in the increase of gas phase flow speed, and then the average sand production speed increased. When the throat radius increased to 8 mm, the average sand production speed no longer increased and slightly decreased, and its peak value was 184.65 m/s; In the case of the same sand generation rate, it is concluded that the larger the throat radius, the greater the sand speed, the shorter the residence time of the sand in the nozzle, and the less the mass of sand to be ejected from the contraction section and the more sparse the distribution state. It was verified that EDEM-Fluent coupling simulation of gas-solid two-phase flow field in nozzle was feasible and reasonable. Based on this simulation model, the relationship between average sand production speed and total sand production amount and different nozzle structural parameters was obtained, among which the throat radius had the most significant effect on the two. The larger the throat radius, the greater the average sand production speed, the less the total amount of sand counted at the nozzle outlet per unit time. |
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