Design and Optimization of High-Pressure Water Jet for Coal Breaking and Punching Nozzle Considering Structural Parameter Interaction
The technology of increasing coal seam permeability by high-pressure water jet has significant advantages in preventing and controlling gas disasters in low-permeability coal seam. The structural parameters of a nozzle are the key to its jet performance. The majority of the current studies take stri...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Machines |
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| Online Access: | https://www.mdpi.com/2075-1702/10/1/60 |
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| author | Lihuan Chen Muzheng Cheng Yi Cai Liwen Guo Dianrong Gao |
| author_facet | Lihuan Chen Muzheng Cheng Yi Cai Liwen Guo Dianrong Gao |
| author_sort | Lihuan Chen |
| collection | DOAJ |
| description | The technology of increasing coal seam permeability by high-pressure water jet has significant advantages in preventing and controlling gas disasters in low-permeability coal seam. The structural parameters of a nozzle are the key to its jet performance. The majority of the current studies take strike velocity as the evaluation index, and the influence of the interaction between the nozzle’s structural parameters on its jet performance is not fully considered. In practice, strike velocity and strike area will affect gas release in the process of coal breaking and punching. To further optimize the structural parameters of coal breaking and punching nozzle, and improve water jet performance, some crucial parameters such as the contraction angle, outlet divergence angle, and length-to-diameter ratio are selected. Meanwhile, the maximum X-axis velocity and effective Y-axis extension distance are used as evaluation indexes. The effect of each key factor on the water jet performance is analyzed by numerical simulation using the single factor method. The significance and importance effect of each factor and their interaction on the water jet performance are quantitatively analyzed using the orthogonal experiment method. Moreover, three optimal combinations are selected for experimental verification. Results show that with an increase in contraction angle, outlet divergence angle, and length-to-diameter ratio, the maximum X-axis velocity increases initially and decreases thereafter. The Y-direction expansion distance of the jet will be improved significantly with an increase in the outlet divergence angle. Through field experiments, the jet performance of the improved nozzle 3 is the best. After optimization, the coal breaking and punching diameter of the nozzle is increased by 118%, and the punching depth is increased by 17.46%. |
| first_indexed | 2024-03-10T01:05:18Z |
| format | Article |
| id | doaj.art-47ed277181b54ad59758f4e28792c4c9 |
| institution | Directory Open Access Journal |
| issn | 2075-1702 |
| language | English |
| last_indexed | 2024-03-10T01:05:18Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj.art-47ed277181b54ad59758f4e28792c4c92023-11-23T14:26:53ZengMDPI AGMachines2075-17022022-01-011016010.3390/machines10010060Design and Optimization of High-Pressure Water Jet for Coal Breaking and Punching Nozzle Considering Structural Parameter InteractionLihuan Chen0Muzheng Cheng1Yi Cai2Liwen Guo3Dianrong Gao4School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, ChinaSchool of Mechanical and Electrical Engineering, North China Institute of Aerospace Engineering, Langfang 065000, ChinaSchool of Mechanical and Electrical Engineering, North China Institute of Aerospace Engineering, Langfang 065000, ChinaCollege of Mining Engineering, North China University of Science and Technology, Tangshan 063210, ChinaSchool of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, ChinaThe technology of increasing coal seam permeability by high-pressure water jet has significant advantages in preventing and controlling gas disasters in low-permeability coal seam. The structural parameters of a nozzle are the key to its jet performance. The majority of the current studies take strike velocity as the evaluation index, and the influence of the interaction between the nozzle’s structural parameters on its jet performance is not fully considered. In practice, strike velocity and strike area will affect gas release in the process of coal breaking and punching. To further optimize the structural parameters of coal breaking and punching nozzle, and improve water jet performance, some crucial parameters such as the contraction angle, outlet divergence angle, and length-to-diameter ratio are selected. Meanwhile, the maximum X-axis velocity and effective Y-axis extension distance are used as evaluation indexes. The effect of each key factor on the water jet performance is analyzed by numerical simulation using the single factor method. The significance and importance effect of each factor and their interaction on the water jet performance are quantitatively analyzed using the orthogonal experiment method. Moreover, three optimal combinations are selected for experimental verification. Results show that with an increase in contraction angle, outlet divergence angle, and length-to-diameter ratio, the maximum X-axis velocity increases initially and decreases thereafter. The Y-direction expansion distance of the jet will be improved significantly with an increase in the outlet divergence angle. Through field experiments, the jet performance of the improved nozzle 3 is the best. After optimization, the coal breaking and punching diameter of the nozzle is increased by 118%, and the punching depth is increased by 17.46%.https://www.mdpi.com/2075-1702/10/1/60nozzlehigh-pressure water jetstructural parameternumerical simulationinteractionstructure optimization |
| spellingShingle | Lihuan Chen Muzheng Cheng Yi Cai Liwen Guo Dianrong Gao Design and Optimization of High-Pressure Water Jet for Coal Breaking and Punching Nozzle Considering Structural Parameter Interaction Machines nozzle high-pressure water jet structural parameter numerical simulation interaction structure optimization |
| title | Design and Optimization of High-Pressure Water Jet for Coal Breaking and Punching Nozzle Considering Structural Parameter Interaction |
| title_full | Design and Optimization of High-Pressure Water Jet for Coal Breaking and Punching Nozzle Considering Structural Parameter Interaction |
| title_fullStr | Design and Optimization of High-Pressure Water Jet for Coal Breaking and Punching Nozzle Considering Structural Parameter Interaction |
| title_full_unstemmed | Design and Optimization of High-Pressure Water Jet for Coal Breaking and Punching Nozzle Considering Structural Parameter Interaction |
| title_short | Design and Optimization of High-Pressure Water Jet for Coal Breaking and Punching Nozzle Considering Structural Parameter Interaction |
| title_sort | design and optimization of high pressure water jet for coal breaking and punching nozzle considering structural parameter interaction |
| topic | nozzle high-pressure water jet structural parameter numerical simulation interaction structure optimization |
| url | https://www.mdpi.com/2075-1702/10/1/60 |
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